Atomic number of “Oxygen” is:
- (A) 8
- (B) 9
- (C) 10
- (D) 11
- (A) 8
Carbon, diamond and graphite are used together called:
- (A) Allotrope
- (B) Isomers
- (C) Isomorphs
- (D) Isotopes
- (A) Allotrope
Majority of the elements exist in the form of:
- (A) Gas
- (B) Solid
- (C) Liquid
- (D) Metalloid
- (B) Solid
Which is the most precious metal?
- (A) Iron
- (B) Gold
- (C) Platinum
- (D) Mercury
- (C) Platinum
Which metal floats on water?
- (A) Sodium
- (B) Calcium
- (C) Potassium
- (D) Magnesium
- (A) Sodium
The least conductor of heat is:
- (A) Gold
- (B) Lead
- (C) Iron
- (D) Silver
- (B) Lead
The element is common to all acids is:
- (A) Carbon
- (B) Hydrogen
- (C) Oxygen
- (D) Sulphur
- (B) Hydrogen
Which of the following is most soluble in water?
- (A) Common Salt
- (B) Camphor
- (C) Sulfur
- (D) Sugar
- (D) Sugar
Which metal was first discovered by man?
- (A) Iron
- (B) Copper
- (C) Bronze
- (D) Silver
- (B) Copper
Which of the following is the lightest gas?
- (A) Ammonia
- (B) Hydrogen
- (C) Nitrogen
- (D) Carbon dioxide
- (B) Hydrogen
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