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Hydrogen Mock Tests

28 questions available

Hydrogen Mock Test 1

Questions: 28

नमूना प्रश्न

NEET Chemistry
Hard water does not lather well with soap because:
A It is alkaline in nature
B It contains Ca²⁺ and Mg²⁺ ions which form insoluble precipitates with soap
C It contains Na⁺ ions
D It is always hard in texture
EAPCET Chemistry
The reagent used to distinguish between alkanes and alkenes is:
A Silver nitrate
B Litmus solution
C Lime water
D Bromine water (Br2/CCl4)
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
Why does water have an anomalously high boiling point compared to other hydrides of group 16?
A High electronegativity of oxygen
B Extensive intermolecular hydrogen bonding
C Linear molecular geometry
D High molecular mass
EAPCET Chemistry
Temporary hardness of water can be removed by:
A Boiling
B Filtration
C Evaporation
D Distillation
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
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

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