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MCQs on Chemical Reactions and Equations, class 10 science | Physics Advocate

Multiple Choice Questions

Q1.

The removal of Hydrogen from a substance is known as ----

(i) oxidation

(ii) dehydration

(iii) reduction

(iv) crystallisation


Q2.

The development of unpleasant smell and taste in fat and oil containing foods due to aerial oxidation is ----

(i) acidity

(ii) rancidity

(iii) displacement

(iv) sublimation


Q3.

In order to obtain a yellow precipitate from Lead Nitrate, you should mix a solution of ----

(i) Potassium Chloride

(ii) Potassium Iodide

(iii) Potassium Bromide

(iv) Potassium Cyanide


Q4.

In exothermic reactions ----

(i) thermostat is required

(ii) energy is released

(iii) Energy is absorbed

(iv) None of the above


Q5.

Find a & b in -

(i) a = 1, b = 1

(ii) a = 1, b = 2

(iii) a = 3, b = 1

(iv) a = 2, b = 1


Q6.

Which gas/gases are released when FeSO4 is heated?

(i) Sulphur Dioxide

(ii) Sulphur Trioxide

(iii) Both (i) & (ii)

(iv) None of these


Q7.

Which compound is used in black and white photography?

(i) Silver Chloride

(ii) Silver Oxide

(iii) Aluminium Oxide

(iv) Aluminium Chloride


Q8.

When Lead Nitrate is heated, which gas & of which colour did you notice?

(i) colourless Carbon Dioxide

(ii) colourless Nitrogen gas

(iii) brown Sulphur Dioxide

(iv) brown Nitrogen Dioxide


Q9.

Which is not a characteristic of chemical reactions?

(i) change in colour

(ii) change in state

(iii) change in magnetic field

(iv) evolution of a gas


Q10.

What will happen when dilute H2SO4 reacts with Zn?

(i) Hydrogen gas evolve

(ii) Carbon dioxide gas evolve

(iii) Zinc oxide formed

(iv) Zinc carbonate formed


Q11.

Electrolysis of water is a ----.

(i) Combination reaction

(ii) displacement reaction

(iii) double displacement reaction

(iv) None of these


Q12.

In this reaction,

(i) Chlorine is the reducing agent

(ii) Hydrogen sulphide is the oxidising agent

(iii) Both (i) & (ii)

(iv) None of these

Comment down your thoughts :-)

---------------------------------------------------------------------------------

ANSWERS

Ans1. (i)

Ans2. (ii)

Ans3. (ii)       Ans4. (ii)

Ans5. (iv)

Ans6. (iii)     Ans7. (i)

Ans8. (iv)

Ans9. (iii)     Ans10. (i)

Ans11. (iv)

Ans12. (iv)

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by   www.advguruji.blogspot.com



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Comments

  1. Anonymous02 March, 2023

    Quality of questions, Easy to recap the topic.

    ReplyDelete
  2. Anonymous02 March, 2023

    Oo

    ReplyDelete

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