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Chemistry
Which metal is liquid at room temperature?
A
Sodium
B
Mercury
C
Iron
D
Copper
Correct Answer
B
Chemistry
The molecular formula of methane is:
A
CH?OH
B
C?H?
C
CH?
D
C?H?
Correct Answer
C
Chemistry
Which gas is used in balloons?
A
Oxygen
B
Nitrogen
C
Chlorine
D
Helium
Correct Answer
D
Chemistry
Who discovered the nucleus of an atom?
A
Dalton
B
Rutherford
C
Thomson
D
Bohr
Correct Answer
B
Chemistry
The formula of common salt is:
A
KCI
B
Na?CO?
C
NACL
D
CaCl?
Correct Answer
C
Chemistry
Which particle has no charge?
A
Proton
B
Electron
C
Neutron
D
Ion
Correct Answer
C
Chemistry
Which acid is present in vinegar?
A
Sulfuric acid
B
Hydrochloric acid
C
Acetic acid
D
Nitric acid
Correct Answer
C
Chemistry
The SI unit of amount of substance is:
A
Gram
B
Mole
C
Litre
D
Kilo gram
Correct Answer
B
Chemistry
Which element is known as the lightest element?
A
Helium
B
Hydrogen
C
Nitrogen
D
Oxygen
Correct Answer
B
Chemistry
The chemical symbol of Gold is:
A
Gu
B
Gd
C
Au
D
Ag
Correct Answer
C