There are about _______ naturally occurring elements.
- (A) 90
- (B) 92
- (C) 94
- (D) 96
- (B) 92
Which gas is used in the cigarette lighter?
- (A) Radon
- (B) Methane
- (C) Butane
- (D) Propane
- (C) Butane
What is the first element of periodic table?
- (A) Sodium
- (B) Helium
- (C) Calcium
- (D) Hydrogen
- (D) Hydrogen
Which is the shortest period in the modern periodic table?
- (A) First period
- (B) Second period
- (C) Third period
- (D) Fourth period
- (A) First period
Which is the longest period in the modern periodic table?
- (A) Second period
- (B) Fourth period
- (C) Sixth period
- (D) Seventh period
- (C) Sixth period
When electricity is passed through neon, it glows:
- (A) Blue
- (B) Red
- (C) Green
- (D) Yellow
- (B) Red
Carbon occurs in nature in the purest form as:
- (A) Diamond
- (B) Coal
- (C) Graphite
- (D) Carbon black
- (A) Diamond
Which of the following gases is filled in the electric light bulb?
- (A) Hydrogen
- (B) Argon
- (C) Chlorine
- (D) Nitrogen
- (B) Argon
Which of the following acid is used in flavoring food?
- (A) Acetic acid
- (B) Hydrochloric acid
- (C) Nitric acid
- (D) Sulfuric acid
- (A) Acetic acid
What is the nature of water?
- (A) Polar
- (B) Non-polar
- (C) Acidic
- (D) Basic
- (A) Polar
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