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NTSE Class 10 Chemistry

Obj.(contd.)

80 Qs

Related Questions to study

Neutral solution in the following is:

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ml will be neutralized by:

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A hydrocarbon gas decolourises alkaline potassium permanganate and gives precipitate with ammonical silver nitrate. The gas is :

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How many grams of methanol must be added to moles of to make a solution containing equal numbers of molcules of and ?

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The number of molecules in gram of ammonia will be:

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The number of neutrons in element '' will be-

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Which of the following statements is correct?

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The species that does not contain peroxide ion is :

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The electronic configuration of four elements is given below. Which has the tendency to form covalent as well as ionic bonds?

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On passing gas in acidified solution, green colour is produced due to formation of:

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Equal weights and hydrogen are mixed in an empty container at . The fraction of total pressure exerted by hydrogen is-

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Baeyers reagent is in which medium?

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At 500 K, the half-life period of a gaseous reaction at an initial pressure of 80 kPa is 350 s. When the pressure is 40 kPa, the half-life period is 175 s. The order of the reaction is:

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The nuclear model of the atom was suggested by:

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The SI unit for force is:

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Which one of the following solution will conduct electricity?

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Which of the following properties of a solution of will not vary as the concentration of salt is increased?

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Which of the following is not an illustration of a smelting method?

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The gas least soluble in water is:

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The substance having the lowest boiling point is:

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Which one of the following is an acidic salt?

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Ethylene is a/an :

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Which one of the following methods is not used to purify liquid organic compound?

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Which one of the following elements is not detected by Lassaigne's test?

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Estimation of halogens in organic compounds is done by:

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The first three members of the paraffin series are and . The next higher homologue of this series will be :

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Artificial radioactivity was discovered by:

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If the pH of pure water is , then the hydrogen ion concentration, in mol L will be:

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A full bottle of concentrated left uncorked for several days was observed to overflow. This was probably due to _____________.

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An useful generalisation in chemistry is "like dissolves like". Based on this principle, which of the following pair of compounds will dissolved completely into each other?

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In photosynthesis in plants, and react in presence of light and chlorophyll to give carbohydrate and oxygen. When the carbohydrate is burnt in air, the gases produced are:

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The nuclear reaction-
is called:

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The chemical formula of a particular compound represents :

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Addition of aqueous to the solution of copper sulphate gives a blue solution due to:

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The arrangement of valency electrons in excited state of carbon is :

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Which one of the following is used to prepare polythene plastic?

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Which one of the following chemical reaction is true?

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Which one of the following chemical reactions is not true?

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The components of foods which is primarily used for generating and building tissues is

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Deficiency of vitamins in the food leads:

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Amino acids are found in :

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A compound has the following structural formula 

The compound is a/an:

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Ethanol is separated form water by:

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Two or more compounds which have the same number of the same kind of atoms are called:

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The chief source of aromatic compounds is :

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On passing the mixture of air and methane on the heated molybdeum (catalyst), we get:

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Soaps are:

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The quantum number that tends to specify the orientation in space for an orbital is the :

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The total number of sigma bonds in is_______.

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Which of the following is amorphous?

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Water exists both as solid and liquid at:

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Which of the following would contain the same number of atoms as of magnesium?                  (At. wt: )

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The oxidation state of manganese in is:

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Which of the following has the highest oxidation potential?

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A newly discovered element is placed in group of the periodic table since it forms :

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Which of the following will result in the oxidation of the halide ions?

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Which of the following metals would evolve hydrogen from dilute nitric acid?

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Ordinary white phosphorous consists of phosphorus molecules of formula :

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What happens when phosphorus is heated with strong sodium hydroxide solution?

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Which of the following compounds forms an aqueous solution which is acidic when compared with water?

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What is observed when excess of dilute solution added to an aqueous solution of aluminium chloride?

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What happens when water vapour is passed over a red hot iron?

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Highly electropositive metals are best produced by ____________.

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Which one of the following is used as fuel?

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The most favourable conditions of temperature and pressure for the catalytic oxidation of into are:

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Fomaldehyde is the starting material for the manufacture of :

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The compound having the molecular formula is a :

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Which of the following is an alkane?

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The compound which can be used to prepare idoform is:

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The oxidation number of sulphur in is :

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The electronic configuration of an element having atomic number is:

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If the electronic configuration of an atom the atomic number of the atom is-

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The values of magnetic quantum number for azimuthal quantum number are-

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The nuclear structures of some atoms are as follows-
        
 
from these isobaric are-

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The number of protons, neutrons and orbital electrons in particles form letters to are given in the following table.
ParticleProtonsNeutronsElectrons
Choose from the table the letters that represent an atom of inert gas.

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Which one of the following furnaces can produce the highest temperature?

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All the alkali metals have valency :

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The atomic number of an element is . Therefore the number of electrons in the M-shell of its atom is:

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A pair of compounds which is an illustration of law of multiple proportions is:

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The valency of elements in the periodic table in respect of hydrogen :

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Obj.(contd.)

87 Qs

Related Questions to study

Which of the following pairs shows diagonal relationship?

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The chemical properties of an atom depend upon: 

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The standard emf of a galvanic cell involving cell reaction with n = 2 is found to be 0.295 V at 25C°. The equilibrium constant of the reaction would be
(Given,  )

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The number of electrons present in the outer most shell of the halogens are:

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Halogens are put in the periodic table in :

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The chemical name of lunar caustic is:

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Within a group of the periodic table as one goes from downward to upward, the metallic character :

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The number of electrons in the outermost orbit of the chlorine is 

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Which one of the following is a mixture?

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Which one of the following is chemical change?

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Which one of the following statement is true?

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The three elements most usually contained in fertilizers are:

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A white solid is soluble in hot water but almost insoluble in cold water. When potassium chromate is added to its hot solution a yellow precipitate is obtained. The original solid is:

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Which of the following is not a property of nitrogen?

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Bleaching powder is an example of:

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Helium was discovered by:

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Which one of the following gas does not form part of the atmosphere?

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Hydrogen is liberated from nitric acid by the action of:

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Hydrochloric acid reacts with metals to produce:

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Which is the hottest part of Bunsen flame?

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Sulphur dioxide bleaches colouring matter by ___________.

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When testing hardness of water, the water may be titrated with standard soap solution. The usual end point in the titration is :

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Nitric acid does not react with :

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Any physical and chemical process by which low grade ores are concentrated, is __________.

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It is dangerous to cut a piece of yellow phosphorus in air. This is because :

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The reactions favoured by light are called:

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Which one of the following is not a colloid?

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Oxygen is manufactured by the fractional evaporation of:

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The principle source of oxygen in industry today is:

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A substance which removes water from material is called:

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When quickline is reacted with water, the reaction is:

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The substance capable of being drawn into a wire is called:

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If the concentration of the reactants is decreased, the rate of reaction:

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Chlorine is used in:

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Chlorine is found in combined state in :

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Which one of the following absorbs moisture from atmosphere?

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Sulphur is used in:

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Which one of the following substances increase in weight by burning in air?

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Which one of the following substances is formed by the reaction of potassium permanganate on concentrated by hydrochloric acid?

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Which one of the following is non-metal?

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The solubility of a salt at is and at it is . A saturated solution of of the salt is cooled from to . How much salt settle down?

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On heating coal with conc. Sulphuric acid, we get :

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The number of molecules of water of crystallisation present in one molecule of ferrous sulphate is_______.

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Which one of the following compounds gives oxygen on heating?

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How many grams of hydrochloric acid are formed when grams of hydrogen combine with the excess of chlorine?

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Which one of the following compounds is heated with slaked lime to produce ammonia?

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The function of 'buffer solution' is:

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Which of the following is favourable condition for the reaction calories ?

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If a solid is dispersed in a liquid, the colloid is known as:

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When salt is dissolved in water, there is:

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The oxidation number of is in the compound:

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Jena glass is a mixture of:

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Green coloured glasses are obtained by adding :

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Which one of the following methods is used to manufacture sodium hydroxide?

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Which one of the following reactions does not give precipitate?

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Which one of the following metals is used as foil in wrapping cigarettes and confectionery?

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Which one of the following salts is blue in colour?

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If a salt after rubbing with fingers gives the smell of ammonia, then the salt is:

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The original colour of a salt is black. When it is heated its colour is changed from black to red. The salt may be:

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The colour of an aqueous solution of a salt is deep green, the basic radical of the salt is:

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Which one of the following salt is soluble in water?

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If the colour of the flame obtained by performing the flame test of a substance with the help of platinum wire and concentrated is violet, then the basic radical in the salt is :

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If a salt is insoluble in cold water but soluble in hot water, then the salt is :

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When a substance reacts with dil. sulphuric acid a light brown gas is evolved when a filter paper moistened with acidified starch iodide solution is brought on the month of the test, it is turned blue. The acidic radical in the salt is :

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If a solution of a salt in dil. nitric acid silver nitrate is added, a pale yellow precipitate is obtained. If this precipitate is partly soluble in , then the acid radical of the salt is :

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The indicator which is used to find the strength of caustic soda solution with the help of oxalic acid is:

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On the hydrogenation of oils, the catalyst used is:

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The electrical conductivity of a solution depends upon :

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The degree of ionisation does not depend upon :

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The inert gases are :

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Which one of the following is an alloy?

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Lead pipe for supplying the drinking water are:

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Which one the following substances has the least calorific value?

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The compound which when dissolved in water makes the water hard is:

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Which one of the following is not a function of air?

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Hydrogen gas is manufactured by:

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Hard water can be used:

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The chemical name of the parmutit is:

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Which one of the following oxides is soluble in water?

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The process which is employed to separate the mixture of two miscible liquids differing in their boiling points is:

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The solubility of a gas () in liquid and the pressure () of the gas are :

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The black powder which gives greenish yellow gas when heated with conc. hydrochloric acid is :

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A phenomenon during the course of chemical reaction in which some substance is formed which acts as a catalyst is known as :

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Which one of the following substances is formed when candle burns in chlorine?

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Which one of the following gases cannot be dried by passing though concentrated sulphuric acid?

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Which one of the following oxides dissolves in sulphuric acid as well as in sodium hydroxide?

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The oxides which neither show acidic nor basic character are known as:

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Obj.(contd.)

87 Qs

Related Questions to study

Which one of the following statements is true?

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The molecular formula of heavy water is:

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Diamond on burning in oxygen gives :

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Bleaching action of chlorine is due to:

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One gram atom of aluminium contains:

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The total number of molecules contained in litres of hydrogen at STP is :

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The weights of various ions liberated by passing the same current through different electrolytes are in the ratio of their:

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Dilute sulphuric acid on electrolysis liberates :

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Camphor kept in an open vessel disappears by the process of:

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A solution of ferric chloride in water is acidic to litmus due to:

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The phenomenon of crumbling to powder of sodium carbonate crystals on exposure to air is known as :

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The electronic configuration of Helium is and of oxygen is:

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The shape of ammonia molecules is:

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The catalyst used in the oxidation of to is_________.

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The process by which solid is directly converted to its gaseous form is called:

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Ferric chloride solution is:

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The sum of the oxidation number of all the atoms of a neutral molecule must be:

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The oxidation state of nitrogen in is :

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In of methane, the number of moles is:

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During the electrolysis of copper sulphate solution with copper electrodes, how many coulombs of electricity should pass to oxidise half gram atom of copper to ions?

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Metals which liberate hydrogen on treatment with acids must be:

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The oxidation number of chlorine in is:

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Oxidation is the loss of:

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The celsius scale is used to measure :

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For the isotope , the number of neutrons is:

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During electrolysis, the gram equivalent of silver metal from ions deposited by passing coulombs of electricity is:

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Two compounds which have the same molecular formula but differ in properties are called:

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litres of a monoatomic gas at S.T.P contain :

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At constant temperature, the pressure of a gas to its volume is :

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The shape of methane molecule is:

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Rhombic and monoclinic sulphur are:

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All common metal chlorides are soluble in water except those of: