Question

Choose the correct option i) A polyatomic molecule is a) Sulphur b) Chlorine c)Hydrogen d) Oxygen
ii) Valency of Mg in MgCO3 is a)1. b)2 c)3 d)4
iii) Following is not a fundamental particle of an atom a)electrons b) protonsc) neutrons d) molecule
iv) A substance that contains molecules made up of non identical atoms is a)Carbon monoxide b)Helium c)Nickel d) Aluminium
v) Rust is a)NH3. b)Fe2O3 c)SiO2 d)KI vi) Method used to separate iron fillings and sulphur powder is a) Sublimation b) Evaporation c) Magnetic Separation d)Crystallisation
vii) Following is a metalloid a) Boronb) Bromine C)Beryllium d) Sodium
viii) The most abundant metal is a) Magnesium. b) Aluminium C)Potassium d) Copper
ix) Out of 118 elements, number of metals are a) 66. b) 77 c)99 d) 88
x) Symbol of element derived from its latin name is a) H. b) K c) I d) C​

Answer 1

Answer:

i) a) Sulphur

ii) b) 2

iii) d) molecule

iv) a) carbon monoxide

v) b) Fe2O3

vi) c) magnetic separation

vii) a) boron

viii) a) magnesium

ix) b) 77

x) b) K