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 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 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. 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 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 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 […]
5 g of hydrogen peroxide is present in 56 mL of solution. The solution will correspond to
Options
(a) 10 volume (b) 20 volume (c) 30 volume (d) 1.57 volume
Correct Answer:
30 […]
Hardness of water due to presence of salts of
Options
(a) Na⁺ and K⁺ (b) Ca²⁺ and Mg²⁺ (c) Ca²⁺ and K⁺ (d) Ca²⁺ and Na⁺
Correct Answer:
Ca²⁺ and Mg²⁺
Explanation:
No […]
Position of hydrogen in periodic table is such that it can be placed in
Options
(a) both 1st and 17th group (b) only 1st group (c) only 17th group (d) neither in 1st […]
In which of the following reaction, the hydrogen peroxide is a reducing agent?
Options
(a) 2HI + H₂O₂ → 2H₂O + I₂ (b) CI₂ + H₂O₂ → 2HCl + O₂ (c) 2FeCl₂ + […]
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