The most suitable thermometer for measuring the boiling point of water is:
- (A) Mercury thermometer
- (B) Alcohol thermometer
- (C) Bimetallic thermometer
- (D) Liquid crystal thermometer
- (A) Mercury thermometer
The density of water is greatest at:
- (A) -30°C
- (B) 0°C
- (C) 4°C
- (D) 100°C
- (C) 4°C
Which one of the following statements is true?
- (A) Gases do not conduct heat
- (B) The best conductors are non-metals
- (C) Conduction currents occurs only in liquids
- (D) A vacuum cannot conduct heat
- (D) A vacuum cannot conduct heat
Ice can be changed to water by:
- (A) Adding more water molecules
- (B) Changing the motion of the water molecules
- (C) Rearranging the atoms in water molecules
- (D) Destroying the atoms in water molecules
- (B) Changing the motion of the water molecules
The building block of elements are called:
- (A) Atoms
- (B) Molecules
- (C) Compounds
- (D) Isotopes
- (A) Atoms
Boiling of an egg is a change which is:
- (A) Physical
- (B) Chemical
- (C) Physiological
- (D) Morphological
- (B) Chemical
The temperature of liquid Nitrogen is:
- (A) -32°C
- (B) -80°C
- (C) -100°C
- (D) -196°C
- (D) -196°C
Which one of the following is an alkali?
- (A) Water
- (B) Vinegar
- (C) Lemon juice
- (D) Slaked lime
- (D) Slaked lime
If an alkali is slowly mixed to an acidic solution, the pH of the acidic solution will:
- (A) Increase
- (B) Decrease
- (C) Increase to 7 and then decrease
- (D) Decrease to 7 and then increase
- (A) Increase
The usual raw material for ceramics, generally found beneath the top soil is?
- (A) Sand
- (B) Silt
- (C) Clay
- (D) Plaster of Paris
- (C) Clay