set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

AgNO₃(aq) + NaCl(aq) ⟶ AgCl(s) + NaNO₃(aq) Above reaction is -

a) combination reaction

b) precipitation reaction

c) double displacement reaction

d) Both (b) and (c)

Question : 2

Which is not a balanced equation ?

a) Fe + Cl₂ ⟶ FeCl₃

b) NaOH + HCl ⟶ NaCl + H₂O

c) Mg + CuSO₄ ⟶ MgSO₄ + Cu

d) Mg + 2HNO₃ ⟶ Mg(NO₃ )₂ + H₂

Question : 3

Which of the following does not corrode when exposed to the atmosphere?

a) Gold

b) Iron

c) Copper

d) Silver

Question : 4

In the following equations : NaCO₃ + xHCL ⟶ 2NaCl + CO₂ + H₂O, the value x is

a) 3

b) 1

c) 2

d) 4

Question : 5

Which of the following statements is not correct?

a) A chemical equations tells us about the atom or molecules of the reactants and products involved in a reaction

b) A chemical equations tells us about the substances involved in a reaction.

c) A chemical equations informs us about the symbols and formula of substances involved in a reaction

d) All are correct

Question : 6

CuO + H₂ ⟶ Cu + H₂O Above reaction is an example of

a) neutralisation reaction

b) Redox reaction

c) synthesis reaction

d) decomposition reaction