The reaction in which hydrogen peroxide acts as a reducing agent is
The reaction in which hydrogen peroxide acts as a reducing agent is
Options
(a) PbS + 4H₂O₂ → PbSO₄ + 4H₂O (b) 2KI + H₂O₂ → 2KOH + I₂ (c) 2FeSO₄ + H₂SO₄ […]
Hydrogen and Redox Reactions
Alum is a water purifier because it
Alum is a water purifier because it
Options
(a) coagulates the impurities (b) softens hard water (c) gives taste (d) destroys the pathogenic bacteria
Correct Answer:
coagulates the impurities
Explanation:
No explanation available. […]
What is the volume of ’20 volume H₂O₂. required to get 5000 cm³ of oxygen at STP?
What is the volume of ’20 volume H₂O₂. required to get 5000 cm³ of oxygen at STP?
Options
(a) 250 cm³ (b) 50 cm³ (c) 100 cm³ (d) 125 cm³
Correct Answer:
250 […]
Water is a
Water is a
Options
(a) amphoteric solvent (b) aprotic solvent (c) prophobic solvent (d) prophilic solvent
Correct Answer:
amphoteric solvent
Explanation:
No explanation available. Be the first to write the explanation for this […]
Ammonia gas dissolves in water to form NH₄OH.In this reaction water acts as
Ammonia gas dissolves in water to form NH₄OH.In this reaction water acts as
Options
(a) a conjugate base (b) an acid (c) a non-polar solvent (d) a base
Correct Answer:
an acid
Explanation: […]
If 10 cm³ solution of H₂O₂ ,on decomposition gives 150 cm³ of O₂
If 10 cm³ solution of H₂O₂ ,on decomposition gives 150 cm³ of O₂ at STP, then volume strength of H₂O₂ is
Options
(a) 20 vol (b) 15 vol (c) 10 vol (d) 30 […]
If 2 g of aluminium is treated, first with excess of dilute H₂SO₄ and then
If 2 g of aluminium is treated, first with excess of dilute H₂SO₄ and then with excess of NaOH, the ratio of the volumes of hydrogen evolved is
Options
(a) 1:1 (b) 1:2 […]
Chemical A is used for water softening to remove temporary hardness.
Chemical A is used for water softening to remove temporary hardness. A reacts with sodium carbonate to generate caustic soda.When CO₂ is bubbled through A, it turns cloudy. what is A?
Options
(a) […]
If a given sample of water contains 0.06 g of Ca²⁺ ion per kg, calculate
If a given sample of water contains 0.06 g of Ca²⁺ ion per kg, calculate the ppm level of Ca²⁺ ions
Options
(a) 0.6 (b) 60 (c) 6 (d) 600
Correct Answer:
60
Calculate the amount of [Ca(OH)₂] required to remove the hardness of water
Calculate the amount of [Ca(OH)₂] required to remove the hardness of water from 60,000 litres containing 16.2 g of Ca(HCO₃)₂ per 100 litre
Options
(a) 1.11 kg (b) 2.22 kg (c) 3.33 kg […]