Hydrogen Mock Tests

28 questions available

Hydrogen Mock Test 1

Questions: 28

Sample Questions

EAPCET Chemistry

The reagent used to produce hydrogen from zinc and dilute sulfuric acid is:

A Dilute H2SO4

B Water

C Conc HNO3

D Dilute HCl

EAPCET Chemistry

Which of the following is used as an antioxidant in rubber and cosmetics?___SEQ___27

A H₂O₂ (hydrogen peroxide)

B H₂O (water)

C D₂O (heavy water)

D NaH (sodium hydride)

EAPCET Chemistry

In which of the following reactions does H₂O₂ act as a reducing agent?

A H₂O₂ + 2H⁺ + 2e⁻ → 2H₂O

B H₂O₂ → H₂O + ½O₂

C H₂O₂ + 2e⁻ → 2OH⁻

D 2Fe²⁺ + H₂O₂ + 2H⁺ → 2Fe³⁺ + 2H₂O

EAPCET Chemistry

Which of the following is responsible for temporary hardness of water?

A CaCl₂

B Ca(HCO₃)₂

C MgCl₂

D NaHCO₃

EAPCET Chemistry

Temporary hardness of water is caused by the presence of:

A CaCl₂ and MgCl₂

B Ca(HCO₃)₂ and Mg(HCO₃)₂

C CaSO₄ and MgSO₄

D Ca(NO₃)₂ and Mg(NO₃)₂

NEET Chemistry

Which of the following has the highest boiling point?

A CH₄

B NH₃

C H₂O

D H₂S

EAPCET Chemistry

H₂O₂ acts as both an oxidising and reducing agent in acidic and basic media. Which of the following reactions demonstrates its reducing action?

A 2I⁻ + H₂O₂ + 2H⁺ → I₂ + 2H₂O

B PbS + 4H₂O₂ → PbSO₄ + 4H₂O

C H₂O₂ + 2OH⁻ + 2Mn(OH)₂ → 2MnO(OH)₂ + 2H₂O

D H2O2 + 2Ag+ + 2OH- → Ag2O + H2O + O2

EAPCET Chemistry

Temporary hardness of water is caused by the presence of:

A calcium and magnesium sulfates

B sodium and potassium chlorides

C calcium and magnesium bicarbonates

D calcium and magnesium chlorides

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