Range of mass of atom is?
(a) 10^-27-10^-25 kg
(b)10^-27-10^-25 mg
(c) 10^-27-10^-25 g
(d) None of them
1 a.m.u=?
(a)1.661x102kg
(b) 1.661x1027g
(c) 1.661x1027mg
(d) None of them
Smallest particle of pure substance which can exist independently is called?
(a) Atom
(b) Molecule
(c) Ion
(d) Compound
Each molecule of hemoglobin is made up of?
(a) 5000 atoms
(b)10,000 atoms
(c) 15,000 atoms
(d) 20,000 atoms
Hemoglobin is times heavier than hydrogen atom?
(a) 48,000
(b)58,000
(c) 68,000
(d)78,000
Species which carry either +ve or-ve charge is called?
(a) Atom
(b) Molecule
(c) Ion
(d) Compound
Valency of aluminum is
(a) +1
(b) +2
(c) +3
(d) +4
Valency of stanic is?
(a) +1
(b) +2
(c) +3
(d) +4
Valency of ferous is?
(1) 10^-7m
(b) 10^-8m
(c) 10^-9m
(d)10^-10m
Valency of sulphide is
(a) -1
(b) -2
(c) -3
(d)-4
Valency of dichromate is?
(b) -2
(a)-1
(b) -2
(c) -3
(d)-4
Valency of permanganate is
(a) -1
(b) -2
(c)-3
(d)-4
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