Q1.
Q3.
During the decomposition of ferrous The decomposition reaction
sulphate crystals, a student notices that the
green crystals first lose their colour and
then a brown solid remains in the test tube.
Which statement best explains these is classified as
observations?
(1) thermal decomposition
(1) Ferrous sulphate decomposes directly
into iron and sulphur dioxide. (2) electrolytic decomposition
(2) Ferrous sulphate crystals first lose (3) photochemical decomposition
water of crystallisation and then
decompose to form ferric oxide, sulphur (4) displacement reaction
dioxide and sulphur trioxide.
(3) Ferrous sulphate reacts with
atmospheric oxygen to form ferric Q4.
sulphate.
A student stores silver chloride in a
(4) Ferrous sulphate melts completely transparent bottle near a window. After
before forming iron metal. several days, the colour of the solid
changes. The most appropriate explanation
is that
Q2. Match List-I with List-II. (1) silver chloride absorbs moisture from
air
List-I List-II
A. Calcium I. Brown gas evolved (2) sunlight causes decomposition of silver
oxide during decomposition chloride
B. Silver II. Turns grey on
(3) silver chloride reacts with oxygen
chloride exposure to sunlight
III. Produces slaked lime (4) silver chloride evaporates slowly
C. Lead nitrate
on reaction with water
D. Zinc + dilute IV. Evolution of
sulphuric acid hydrogen gas
Q5.
Choose the correct answer:
(1) A-III, B-II, C-I, D-IV
(2) A-II, B-I, C-IV, D-III
(3) A-III, B-IV, C-I, D-II
(4) A-IV, B-II, C-III, D-I
, A brown gas is evolved during heating. Q8.
This observation provides evidence for
(1) formation of a precipitate
(2) evolution of a gas
(3) displacement reaction
(4) neutralisation reaction
Q6. The brown deposit formed on the iron nail
consists of
Which of the following reactions is a
displacement reaction? (1) FeSO₄
(1) CaO + H₂O → Ca(OH)₂ (2) Cu
(2) Fe + CuSO₄ → FeSO₄ + Cu (3) CuO
(3) CaCO₃ → CaO + CO₂ (4) Fe₂O₃
(4) 2AgCl → 2Ag + Cl₂
Q9. Match List-I with List-II.
Q7.
List-I List-II
An iron nail is immersed in copper A. Burning of I. Displacement
sulphate solution for some time. Which magnesium ribbon reaction
observation supports the occurrence of a B. Heating ferrous II. Combination
displacement reaction? sulphate reaction
C. Iron in copper III. Thermal
(1) Blue solution becomes colourless sulphate solution decomposition
D. Sodium sulphate + IV. Double
(2) Blue colour fades and brown coating barium chloride displacement
appears
Choose the correct answer:
(3) Iron nail dissolves completely
(1) A-II, B-III, C-I, D-IV
(4) White precipitate forms
(2) A-III, B-II, C-IV, D-I
(3) A-I, B-II, C-III, D-IV
(4) A-II, B-IV, C-I, D-III
Q3.
During the decomposition of ferrous The decomposition reaction
sulphate crystals, a student notices that the
green crystals first lose their colour and
then a brown solid remains in the test tube.
Which statement best explains these is classified as
observations?
(1) thermal decomposition
(1) Ferrous sulphate decomposes directly
into iron and sulphur dioxide. (2) electrolytic decomposition
(2) Ferrous sulphate crystals first lose (3) photochemical decomposition
water of crystallisation and then
decompose to form ferric oxide, sulphur (4) displacement reaction
dioxide and sulphur trioxide.
(3) Ferrous sulphate reacts with
atmospheric oxygen to form ferric Q4.
sulphate.
A student stores silver chloride in a
(4) Ferrous sulphate melts completely transparent bottle near a window. After
before forming iron metal. several days, the colour of the solid
changes. The most appropriate explanation
is that
Q2. Match List-I with List-II. (1) silver chloride absorbs moisture from
air
List-I List-II
A. Calcium I. Brown gas evolved (2) sunlight causes decomposition of silver
oxide during decomposition chloride
B. Silver II. Turns grey on
(3) silver chloride reacts with oxygen
chloride exposure to sunlight
III. Produces slaked lime (4) silver chloride evaporates slowly
C. Lead nitrate
on reaction with water
D. Zinc + dilute IV. Evolution of
sulphuric acid hydrogen gas
Q5.
Choose the correct answer:
(1) A-III, B-II, C-I, D-IV
(2) A-II, B-I, C-IV, D-III
(3) A-III, B-IV, C-I, D-II
(4) A-IV, B-II, C-III, D-I
, A brown gas is evolved during heating. Q8.
This observation provides evidence for
(1) formation of a precipitate
(2) evolution of a gas
(3) displacement reaction
(4) neutralisation reaction
Q6. The brown deposit formed on the iron nail
consists of
Which of the following reactions is a
displacement reaction? (1) FeSO₄
(1) CaO + H₂O → Ca(OH)₂ (2) Cu
(2) Fe + CuSO₄ → FeSO₄ + Cu (3) CuO
(3) CaCO₃ → CaO + CO₂ (4) Fe₂O₃
(4) 2AgCl → 2Ag + Cl₂
Q9. Match List-I with List-II.
Q7.
List-I List-II
An iron nail is immersed in copper A. Burning of I. Displacement
sulphate solution for some time. Which magnesium ribbon reaction
observation supports the occurrence of a B. Heating ferrous II. Combination
displacement reaction? sulphate reaction
C. Iron in copper III. Thermal
(1) Blue solution becomes colourless sulphate solution decomposition
D. Sodium sulphate + IV. Double
(2) Blue colour fades and brown coating barium chloride displacement
appears
Choose the correct answer:
(3) Iron nail dissolves completely
(1) A-II, B-III, C-I, D-IV
(4) White precipitate forms
(2) A-III, B-II, C-IV, D-I
(3) A-I, B-II, C-III, D-IV
(4) A-II, B-IV, C-I, D-III
