Which of the following is the lightest gas?
- (A) Hydrogen
- (B) Oxygen
- (C) Helium
- (D) Nitrogen
- (A) Hydrogen
The instrument used to measure the density of milk is called:
- (A) Hydrometer
- (B) Lactometer
- (C) Anemometer
- (D) Hygrometer
- (B) Lactometer
“Dilute Acetic Acid” is the chemical name of:
- (A) Honey
- (B) Lemon Juice
- (C) Vinegar
- (D) Tamarind Juice
- (C) Vinegar
Which of the following is the hardest element?
- (A) Copper
- (B) Diamond
- (C) Iron
- (D) Silicon
- (B) Diamond
The first metal used by humans was:
- (A) Iron
- (B) Copper
- (C) Gold
- (D) Bronze
- (B) Copper
Which of the following is not a mammal?
- (A) Fish
- (B) Cow
- (C) Goat
- (D) Whale
- (A) Fish
“Bronze” is an alloy of:
- (A) Copper and tin
- (B) Iron and silver
- (C) Silver and lead
- (D) Zinc and copper
- (A) Copper and tin
The second most abundant metal found in the Earth’s crust is:
- (A) Iron
- (B) Aluminum
- (C) Calcium
- (D) Sodium
- (A) Iron
An explosive, Dynamite, was invented by:
- (A) Alfred Nobel
- (B) Thomas Edison
- (C) William Davis
- (D) Alexander Fleming
- (A) Alfred Nobel
Fear of confined spaces and enclosed places is known as:
- (A) Hydrophobia
- (B) Claustrophobia
- (C) Kleptophobia
- (D) Acrophobia
- (B) Claustrophobia
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