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Chemical equilibria is (I) _________ in nature. It occurs in (2) ________ reactions only. At equilibria, all (3) __________ properties becomes constant. Chemical equilibrium gets affected by change in temperature, pressure, concentration, volume etc but is not altered by addition of (4)___________. Equilibria are of two types (5) ___________ and homogeneous equilibria.
  1. (1) dynamic (2) reversible (3) observable (4) catalyst (5) homogeneous
  2. (1) static (2) irreversible (3) observable (4) reactants (5) heterogeneous
  3. (1) dynamic (2) irreversible (3) observable (4) reactants (5) homogeneous
  4. (1) dynamic (2) reversible (3) observable (4) catalyst (5) heterogeneous

A
(1) dynamic (2) irreversible (3) observable (4) reactants (5) homogeneous
B
(1) dynamic (2) reversible (3) observable (4) catalyst (5) heterogeneous
C
(1) dynamic (2) reversible (3) observable (4) catalyst (5) homogeneous
D
(1) static (2) irreversible (3) observable (4) reactants (5) heterogeneous
Solution
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Chemical equilibria is dynamic in nature. It occurs in reversible reactions only. At equilibria all observable properties becomes constant. Chemical equilibrium is affected by a change in temperature, pressure, concentration, volume etc but is not altered by the addition of catalyst. Equilibria is of two types heterogeneous and homogeneous equilibria.

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Q1
Chemical equilibria is (I) _________ in nature. It occurs in (2) ________ reactions only. At equilibria, all (3) __________ properties becomes constant. Chemical equilibrium gets affected by change in temperature, pressure, concentration, volume etc but is not altered by addition of (4)___________. Equilibria are of two types (5) ___________ and homogeneous equilibria.
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Q2
A student heats calculated amounts of iron filings and sulphur powder together in a boiling tube. He will obtain :
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Q3
Fill in the blanks with the correct words.
1. Melting of ice-cream is an example of a/an .................... (reversible/irreversible) change.
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Q4

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Q5

STATEMENT 1: Elements cannot be broken down into simpler substances.

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