Which of the following characteristics is not-shown by hydrogen?
1 It burns in air to form water
2 It supports combustion
3 It combines with almost all the metals forming hydrides
4 None of these
Answer / guest
(3) It combines with almost all the metals forming hydrides
| Is This Answer Correct ? | 0 Yes | 4 No |
Names of some plants and trees that sleep during the day
The pink color of Bayer’s reagent is discharged when acetylene is passed through it. This is due to the formation of 1 Acetic acid 2 Ethylene 3 Water 4 Oxalic acid
How does common salt help in separating soap from the solution after saponification ? 1 By decreasing solubility of soap 2 By increasing solubility of soap 3 By decreasing density of soap 4 By increasing density of soap
Which of the following re synthetic rubbers? 1.Thiokol 2.Isoprene 3.Neoprene 1 1 and 2 2 2 and 3 3 1 and 3 4 1,2 and 3
The chemical used as a ‘fixer’ in photography is 1 Borax 2 Sodium thiosulphate 3 Sodium sulphate 4 Ammonium persulphate
What are reflecting nebulae?
Which unit is used to measure sound frequency?
The ore of which of the following metals can be concentrated by hydraulic washing? 1 Tin 2 Sodium 3 Iron 4 Manganese
Chemical formula for water glass is 1 Na2Sio3 2 Al2O3 3 NaA1O2 4 CaSiO3
The location and energy of an electron in an atom can be specified by 1 Atomic mass 2 Atomic number 3 Quantum numbers 4 None of these
Ozone attacks 1 Mercury and silver 2 Copper 3 Silver and iron 4 None of these
Which of the following is the best conductor of electricity? 1 Zinc 2 Copper 3 Gold 4 Silver