Color of calcium flame in the air is:
- (A) Green
- (B) White
- (C) Golden
- (D) Brick red
- (D) Brick red
Which of the following metal burns with a golden yellow flame?
- (A) Iron
- (B) Sodium
- (C) Magnesium
- (D) Calcium
- (B) Sodium
The green color flame is produced in fire-works is due to presence of:
- (A) Mercury
- (B) Sodium
- (C) Potassium
- (D) Barium
- (D) Barium
How can we get the purest form of water?
- (A) From tube-wells
- (B) By boiling the water
- (C) By distillation process
- (D) From rivers
- (B) By boiling the water
The color of flame of magnesium in air is:
- (A) Brilliant white
- (B) Brick red
- (C) Golden yellow
- (D) Pale yellow
- (A) Brilliant white
The ability of carbon atoms from chains is called:
- (A) Isomerism
- (B) Catenation
- (C) Resonance
- (D) Condensation
- (B) Catenation
Which of the following is an element?
- (A) Ruby
- (B) Sapphire
- (C) Emerald
- (D) Diamond
- (D) Diamond
Which of the following is the safest way to purify water?
- (A) Filtration
- (B) Boiling
- (C) Chlorination
- (D) Hydrogenation
- (B) Boiling
Natural rubber is the polymer of:
- (A) Isoprene
- (B) Styrene
- (C) Butadiene
- (D) Ethylene
- (A) Isoprene
Which of the following is not an addition polymer?
- (A) Nylon
- (B) PVC
- (C) Polythene
- (D) Polystyrene
- (A) Nylon
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