As the temperature of ice rises, the ice melts and its density:
- (A) Decreases
- (B) Remain constant
- (C) Increases
- (D) Increases up to 10°C
- (C) Increases
Which poisonous gas is produced when coal is burnt without enough air supply?
- (A) Ammonia
- (B) Nitrogen
- (C) Hydrogen
- (D) Carbon dioxide
- (D) Carbon dioxide
One molecule of water is composed of:
- (A) Two atoms of hydrogen and two atoms of oxygen
- (B) One atom of hydrogen and one atom of oxygen
- (C) Two atoms of hydrogen and one atom of oxygen
- (D) One atom of hydrogen and two atoms of oxygen
- (C) Two atoms of hydrogen and one atom of oxygen
A polymeric substance used to make parachute is:
- (A) Rayon
- (B) Viscose
- (C) Cotton
- (D) Nylon
- (B) Viscose
The cathode of a lead storage battery is made up of:
- (A) Zinc
- (B) Lead oxide
- (C) Lead
- (D) Manganese dioxide
- (C) Lead
The “Calamine” is an important ore of:
- (A) Silver
- (B) Zinc
- (C) Copper
- (D) Aluminum
- (B) Zinc
Elements are grouped together according to their atomic number in a table. What is this table called:
- (A) Periodic table
- (B) Atomic table
- (C) Table of elements
- (D) Molecular table
- (A) Periodic table
The most commonly used bleaching agent is:
- (A) Alcohol
- (B) Carbon Dioxide
- (C) Chlorine
- (D) Sodium Chloride
- (C) Chlorine
Which gas is used in advertising lights?
- (A) Argon
- (B) Helium
- (C) Neon
- (D) Carbon dioxide
- (C) Neon
Which of the following substance is highly plastic?
- (A) Mica
- (B) Quartz
- (C) Clay
- (D) Granite
- (C) Clay
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