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REVISION QUIZ 3 ( CLASS 10)

Total questions: 35

Worksheet time: 18mins

Name
Class
Date
1.

Which of the statements about the reaction below are incorrect?

2PbO(s) + C(s) → 2Pb(s) + CO2(g)

i. Lead is getting reduced.

ii. Carbon dioxide is getting oxidized.

iii. Carbon is getting oxidized.

iv. Lead oxide is getting reduced.→

a)

(i) and (ii)

b)

(i) and (iii)

c)

(i), (ii) and (iii)

d)

(iv) only

2.

Which of the following is not a balanced equation?

a)

H2+ O2→H2O

b)

Mg + CuSO2→MgSO4+ Cu

c)

NaOH + HCI→NaCI + H2O

d)

Zn + S ⟶ ZnS

3.

Aluminum reacts with copper sulphate to produce

a)

Cu and Al2(SO4)3

b)

CuO and Al2(SO4)3

c)

Cu, Al2S3Al2S3 and SO2

d)

CuO, Al2S3Al2S3 and SO2

4.

What happens when dilute HCl is added to iron filings? Tick the correct answer.

a)

Chlorine gas and iron hydroxide are produced.

b)

Iron salt and water are produced.

c)

Hydrogen gas and iron chloride are produced.

d)

No reaction takes place.

5.

Solid calcium oxide reacts vigorously with water to form calcium hydroxide accompanied by liberation of heat. This process is called slaking of lime. Calcium hydroxide dissolves in water to form its solution called lime water. Which among the following is (are) true about slaking of lime and the solution formed?

i. It is an endothermic reaction

ii. It is an exothermic reaction

iii. The pH of the resulting solution will be more than seven

iv. The pH of the resulting solution will be less than seven

a)

(i) and (ii)

b)

(ii) and (iii)

c)

(i) and (iv)

d)

(iii) and (iv)

6.

Which among the following are endothermic processes?

i. Reaction of quick lime with water

ii. Dilution acid with water

iii. Evaporation of water

iv. Sublimation of solid ammonium chloride

a)

(i) and (ii)

b)

(ii) and (iii)

c)

(i) and (iv)

d)

(iii) and (iv)

7.

Barium chloride on reacting with ammonium sulphate forms barium sulphate and ammonium chloride. Which of the following correctly represents the type of the reaction involve?

i. Displacement reaction

ii. Precipitation reaction

iii. Combination reaction

iv. Double displacement reaction

a)

(i), (iii)

b)

(ii), (iii)

c)

(iii)

d)

(ii), (iv)

8.

Which of the following is not a physical change?

a)

Boiling of water to give water vapour

b)

Melting of ice to give water

c)

Dissolution of salt in water

d)

Combustion of Liquefied Petroleum Gas (LPG)

9.

Which of the following are exothermic processes?

1. Reaction of water with quick lime

2. Dilution of an acid

3. Evaporation of water

4. Sublimation of camphor (crystals)

a)

1 and 2

b)

2 and 3

c)

1 and 4

d)

3 and 4

10.

Which of the following product is formed when calcium oxide reacts with water?

a)

Slaked lime

b)

Carbon dioxide

c)

Calcium oxide

d)

Oxygen gas

11.

What is the chemical name for slaked lime?

a)

Calcium carbonate

b)

Calcium oxide

c)

Calcium hydroxide

d)

Carbon monoxide

12.

Heating of ferrous sulphate gives which of the following product?

a)

Ferric oxide

b)

Sulphur dioxide

c)

Sulphur trioxide

d)

All of the above

13.

In which of the following category will you put the reaction of heating of ferrous sulphate?

a)

Decomposition reaction

b)

Combination Reaction

c)

Displacement reaction

d)

All of the above

14.

In which of the following category will you put the reaction of heating of calcium carbonate?

a)

Decomposition reaction

b)

Thermal decomposition reaction

c)

Endothermic reaction

d)

All of the above.

15.

Which of the following product is formed after heating of limestone?

a)

Calcium oxide

b)

Calcium carbonate

c)

Hydrogen gas

d)

All of the above

16.

What happens when silver chloride is put under sunlight?

a)

Silver metal and chlorine gas are formed

b)

Silver metal and hydrogen gas are formed

c)

Only silver metal is formed

d)

Only hydrogen gas is formed

17.

Which of the following is formed when lead nitrate is put under thermal decomposition?

a)

Lead oxide

b)

Nitrogen dioxide

c)

Oxygen gas

d)

All of the above

18.

What happens when carbon dioxide is passed in lime water?

a)

Lime water turns milky because of formation of calcium carbonate

b)

Lime water turns milky because of formation of water

c)

Lime water turns red because of formation permanganate

d)

Lime water turns red because of formation of copper sulphate

19.

Which of the following gives energy while respiration?

a)

Burning of coal

b)

Burning of natural gas

c)

Burning of oxygen

d)

Burning of glucose

20.

Why magnesium ribbon is cleaned before burning?

a)

To remove dust

b)

To remove magnesium oxide

c)

To remove ribbon oxide

d)

All of the above

21.

What is the name of reaction in which both oxidation and reduction takes place?

a)

Combination reaction

b)

Thermal decomposition

c)

Displacement reaction

d)

Redox reaction

22.

Which of the reaction is used in black and white photography?

a)

Combination reaction

b)

Decomposition reaction

c)

Displacement reaction

d)

Oxidation reaction

23.

A substance has a pH value of 8. It is most likely to be what?

a)

Strong acid

b)

Weak acid

c)

Strong base

d)

Weak base

24.

Which indicator is colourless in acid and pink in alkali?

a)

Litmus

b)

Phenolphthalein

c)

Universal Indicator

d)

Methyl Orange

25.

Complete this equation:

sulfuric acid + potassium hydroxide -->

a)

potassium oxide + hydrogen

b)

potassium chloride + water

c)

potassium sulfate + hydrogen

d)

potassium sulfate + water

26.

Which equation is balanced?

a)

H2SO4 + NaOH --> Na2SO4 + H2

b)

H2SO4 + 2NaOH --> Na2SO4 + H2

c)

H2SO4 + 2NaOH --> Na2SO4 + H2O

d)

H2SO4 + 2NaOH --> Na2SO4 + 2H2O

27.
what happens when a solution of  an acid is mixed with a solution of a base in a test tube?a
a)
temperature of the solution increases 
b)
temperature of the solution decreases
c)
temperature remains constant
d)
no reaction
28.
Plaster of Paris is made from
a)
Lime stone
b)
Slaked Lime
c)
Quick lime
d)
Gypsum
29.
Setting of Plaster of Paris takes place due to
a)
Oxidation
b)
Reduction
c)
Dehydration
d)
Hydration
30.
Washing soda has the formula
a)
Na2CO3.7H2O
b)
Na2CO3.10H2O
c)
Na2CO3.H2)
d)
Na2CO3
31.
What is the name of this ion: H3O+?
a)
helium ion
b)
hydrogen ion
c)
hepatic ion
d)
hydronium ion
32.

A colourless and odourless gas is liberated when hydrochloric acid is added to a solution of washing soda. The name of the gas is

a)

Carbon dioxide

b)

Nitrogen dioxide

c)

Sulphur dioxide

d)

Sulphur trioxide

33.

The compounds obtained on heating baking soda are

a)

Sulphur dioxide and sodium carbonate

b)

Sodium bicarbonate, water and carbon dioxide

c)

Sodium carbonate, water and carbon dioxide

d)

Hydrochloric acid and water

34.

metal oxides are generally

a)

acidic in nature

b)

basic in nature

c)

neutral

d)

some may be acidic some may be basic

35.

An example of an acidic oxide is:

a)

MgO

b)

CO2

c)

BaO

d)

Na2O

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