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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
Chemistry
Who discovered the electron?
A
Rutherford
B
Bohr
C
Chadwick
D
J.J. Thomson
Correct Answer
A
Chemistry
The atomic number of Carbon is:
A
12
B
14
C
6
D
8
Correct Answer
C
Chemistry
What is the chemical formula of water?
A
H?O?
B
H?O
C
HO2
D
H?O
Correct Answer
D
Chemistry
The equation proposed by Planck for the energy of quantum is:
A
E = mc^2
B
E = h?
C
E = 1/2 mv^2
D
E = ??
Correct Answer
B