Hydrogen and its Compounds One Liner Questions & Answers


Questions Answers
1 An element X has four electrons in its outermost orbit. What will be the formula of its compounds with Hydrogen? XH4
2 According to weight, the percentage of Hydrogen in water (H2O), is – 11.11 %
3 One mole of hydrogen gas burns in excess of oxygen to give 290 KJ of heat. What is the amount of heat produced when 4g of Hydrogen gas is burnt under the same conditions? 580 Kj
4 Burning of hydrogen produces – Water
5 Which fuels causes minimum air pollution? Hydrogen
6 Heavy water is a type of – Coolant & Moderator
7 The chemical formula of Heavy Water is – D2O
8 The substance used as moderator and coolant both, in nuclear reactors is – Ordinary water & Heavy water
9 What is heavy water? Oxygen + Heavy Hydrogen
10 Who discovered heavy water? H.C. Urey
11 Permanent hardness of water is due to – Chlorides and sulfates of Calcium and Magnesium
12 The pH value for water is – Nearly 7
13 Which is the purest form of water? Rainwater
14 Water is a good solvent of ionic salts because – It has a high dipole moment
15 Water can dissolve more substances than any other liquid because – It is dipolar in nature
16 Large quantities of drinking water is prepared from impure water by – Desalination
17 Which gas is used in the purification of drinking water? Chlorine
18 By which process the seawater can be converted into pure water? Reverse osmosis
19 By which process, Alum cleans the muddy water? Coagulation
20 The gas used in the manufacture of Vanaspati Ghee from Vanaspati Oil is – Hydrogen
21 Which catalysts is used in the hydrogenation of vegetable oils? Nickel