Quiz on Chemical reaction and Equation class 10

 

1. Which of the following statements about the given reaction are correct?

3Fe_(s) + 4H₂O_(g) => Fe₃O_4(s) + 4H_2(g)

(i) Iron metal is getting oxidised

(ii) Water is getting reduced

(iii) Water is acting as reducing agent

(iv) Water is acting as oxidising agent

(a) (i), (ii) and (iii)

(b) (iii) and (iv)

(c) (i), (ii) and (iv)

(d) (ii) and (iv)

 

2.In the double displacement reaction between aqueous potassium iodide and aqueous lead nitrate, a yellow precipitate of lead iodide is formed.

While performing the activity if lead nitrate is not available, which of the following can be used in place of lead nitrate? 

(a) Lead sulphate 

(b) Lead acetate 

(c) Potassium sulphate

3. A solution of X is used for white washing walls. it reacts slowly with Y in air to form a thin layer of B on walls which gives walls a shiny finish.

which of the following options correctly represents X,Y and B ?

 

a) X =slaked lime , Y = nitrogen , B=calcium oxide

b) X =Calcium Hydroxide, Y=Oxygen, B = Calcium carbonate

c) X= slaked lime, Y=Carbon oxide,B= calcium chloride

d)X= slaked lime,Y=Carbon dioxide,B=Calcium carbonate

 

4.Choose the correct balanced equation of barium chloride and aluminium sulphate.

a)3BaCl2+Al2(SO4)3→3BaSO4+2AlCl3

b) 2BaCl2+Al2(SO4)3→2BaSO4+2AlCl3

c)6BaCl2+2Al2(SO4)3→6BaSO4+4AlCl3

d) none of the above

5.The following reaction is an example of a

 4NH3(g) + 5O2(g) → 4NO(g) + 6H2O(g)

(i) displacement reaction 

(ii) combination reaction

 (iii) redox reaction

 (iv) neutralisation reaction

a) (i) and (iv)

b) (ii) and (iii)

c) (i) and (iii)

d)(iii) and (iv)

 

6. Silver article turns black when kept in open for a few days due to formation of

a) H2S

b) AgS

c)AgSO4

d) Ag2S

 

7. A chemical equation should be balanced to justify Law of the ---

a) conservation of energy

b) conservation of mass

c) All of the above

8. Which among the following statement(s) is(are) true? 

Exposure of silver chloride to sunlight for a long duration turns grey due to

(i) the formation of silver by decomposition of silver chloride

(ii) sublimation of silver chloride

(iii) decomposition of chlorine gas from silver chloride

(iv) oxidation of silver chloride

a) (i) only

b) (i) and (iii)

c) (ii) and (iii)

(d) (iv) only

9. Which of the following are exothermic processes? 

(i) Reaction of water with quick lime 

(ii) Dilution of an acid

(iii) Evaporation of water 

(iv) Sublimation of camphor

a) (i) and (ii)

b) (ii) and (iii)

c) (i) and (iv)

d) (iii) and (iv)

10. Redox reaction involved

a) Addition of hydrogen

b) Addition of oxygen

c) Removal of Hydrogen

d) Both A and C

11. Copper article turns green when kept in open for a few days due to formation of

A. Copper carbonate

B. Basic Copper carbonate

12. MnO₂ in chemical reaction

MnO₂ +  4HCl → MnCl₂ + 2H₂O + Cl₂

A) Reduced

B) Oxidised

Answer Key

1.c      2.b      3.d      4.a      5.c      6.d      7.b      

8.a      9. A    10. D   11. A    12. A

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Chemical reaction and Equation class 10