Question 1

Which of the following is not a property of acid?

Accepted Answer

A. True. They are sour in taste.B. True. They turn blue litmus to red.C. False. Turmeric remains yellow in an acidic medium. It does not change color.

Question 2

Which comparison is not correct as indicated?

Accepted Answer

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Question 3

What is an acid? Write four properties of acids by giving examples.

Accepted Answer

An acid is a chemical species that donates protons or hydrogen ions and/or accepts electrons. Most acids contain a hydrogen atom bonded that can release (dissociate) to yield a cation and anion in water. The higher the concentration of hydrogen ions produced by an acid, the higher its acidity and the lower the pH of the solution.Properties of acids are:Acids change the colour of litmus from blue to red. Acids can conduct electricity due to the presence of ions. Some Acids are highly corrosive in nature which means that they corrode or rust metals.Acids tend to evolve hydrogen gas whilst reacting with an active metal such The pH value of acid is from 0-6.

Question 4

Write three differences between acids and bases.

Accepted Answer

Difference between acids and bases: Acids                                            Bases 1. Sour in taste                              1. Bitter in taste.2. Change blue litmus red.          2. Change red litmus blue.3. Not soapy to touch.                 3. Soapy to touch.

Question 5

You are provided with four test tubes containing sugar solution, baking soda solution, tamarind solution, salt solution. Write down an activity to find the nature (acidic/basic/neutral) of each solution.

Accepted Answer

By tasting the solution present in test tube, we can identify the nature (acidic/basic/neutral) of each solution. Sugar solution: The taste of sugar solution will be sweet. Its taste is not sour or bitter. So, it comes in the category of neutral solution.Baking soda solution: The taste of baking soda solution will be bitter. So, it comes in the category of basic solution.Tamarind solution: The taste of tamarind solution will be sour. So, it comes in the category of acidic solution.Salt solution: The taste of salt solution will be salty. Its taste is not sour or bitter. So, it comes in the category of neutral solution.

Question 6

State whether the following statement is true or false, correct if false.All substances are either acidic or basic.

Accepted Answer

The given statement is false. The correct statement is:In nature, all substances can be acidic, basic or neutral.

Question 7

Match the substances in Column I with those in Column II

Column I Column II
a) Tartaric acid i) Soap
b) Calcium hydroxide ii) curd
c) Formic acid iii) Unripe mangoes
d) Sodium hydroxide iv) Ant's sting
e) Lactic acid v) Lime water

Accepted Answer

The correct table is given below:Column I   Column IIa) Tartaric acidi) Unripe mangoesb) Calcium hydroxide     ii) Lime waterc) Formic acidiii) Ant's stingd) Sodium hydroxideiv) Soapd) Lactic acidv) curd

Question 8

Which of the following acid is present in the sting of an ant?

Accepted Answer

Ants are also known as Formica in Latin. A string of an ant contains formic acid /methanoic acid and that is why there is a burning and itching sensation after an ant's bite.

Question 9

State whether the statement is true or false:Fizzy drinks are basic.

Accepted Answer

Fizzy drinks are also called carbonated beverages. It typically contains carbonated water, a sweetener, and a natural or artificial flavouring agent.Fizzy drinks contain carbon dioxide which combines with water to form carbonic acid resulting in their acidic nature. H_2O + CO_2 \rightarrow H_2CO_3 The statement is false. Therefore, Option B is correct

Question 10

A substance which dissolves in water to furnish  \displaystyle H^{+}  ions is called an acid.

Accepted Answer

False.Correct statement: A substance which dissolves in water to furnish H+H+ ions as the only positively charged ions, is called an acid.

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Identifying Acids and Bases Around Us

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Identifying Acids and Bases

Important Questions

Which of the following is not a property of acid?

Which comparison is not correct as indicated?

What is an acid? Write four properties of acids by giving examples.

Write three differences between acids and bases.

You are provided with four test tubes containing sugar solution, baking soda solution, tamarind solution, salt solution. Write down an activity to find the nature (acidic/basic/neutral) of each solution.

State whether the following statement is true or false, correct if false.
All substances are either acidic or basic.

Match the substances in Column I with those in Column II

Column I Column II
a) Tartaric acid i) Soap
b) Calcium hydroxide ii) curd
c) Formic acid iii) Unripe mangoes
d) Sodium hydroxide iv) Ant's sting
e) Lactic acid v) Lime water

Which of the following acid is present in the sting of an ant?

State whether the statement is true or false:

Fizzy drinks are basic.

A substance which dissolves in water to furnish $H^{+}$ ions is called an acid.

Column I	Column II
a) Tartaric acid	i) Soap
b) Calcium hydroxide	ii) curd
c) Formic acid	iii) Unripe mangoes
d) Sodium hydroxide	iv) Ant's sting
e) Lactic acid	v) Lime water

Revise with Concepts

Identifying Acids and Bases Around Us

Learn with Videos

Quick Summary With Stories

Identifying Acids and Bases

Important Questions

Which of the following is not a property of acid?

Which comparison is not correct as indicated?

What is an acid? Write four properties of acids by giving examples.

Write three differences between acids and bases.

You are provided with four test tubes containing sugar solution, baking soda solution, tamarind solution, salt solution. Write down an activity to find the nature (acidic/basic/neutral) of each solution.

State whether the following statement is true or false, correct if false. All substances are either acidic or basic.

Match the substances in Column I with those in Column II Column IColumn IIa) Tartaric acidi) Soapb) Calcium hydroxideii) curdc) Formic acid iii) Unripe mangoesd) Sodium hydroxide iv) Ant's stinge) Lactic acidv) Lime water

Which of the following acid is present in the sting of an ant?

State whether the statement is true or false: Fizzy drinks are basic.

A substance which dissolves in water to furnish H+ ions is called an acid.

State whether the following statement is true or false, correct if false.
All substances are either acidic or basic.

Match the substances in Column I with those in Column II

Column I Column II
a) Tartaric acid i) Soap
b) Calcium hydroxide ii) curd
c) Formic acid iii) Unripe mangoes
d) Sodium hydroxide iv) Ant's sting
e) Lactic acid v) Lime water

State whether the statement is true or false:

Fizzy drinks are basic.

A substance which dissolves in water to furnish $H^{+}$ ions is called an acid.