How many isotopes have odd atomic number ?
How many isotopes have odd atomic number ?
A. 154
B. 280
C. 86
D. 300
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Elements with similar chemical properties appear in the_________________?A. Same family
B. Same period
C. p block elements
D. Right upper cornerThe property which increases upto group IV-A then decreases on wards_______________?
The property which increases upto group IV-A then decreases on wards_______________?A. Ionization energy
B. Atomic radii
C. Melting & boiling points
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In Galvanic cell electrons flow from anode to cathode through__________________?A. external electric circuit
B. salt bridge
C. movement of ions
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Introduction of nitro group in a molecule is called___________________?A. nitration
B. halogenation
C. sulphonation
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Which of the following can be used in laptops ?A. Silver oxide battery
B. Fuel cell
C. Nickel cadmium cell
D. Lead accumulatorMethanol can be obtained from_________________?
Methanol can be obtained from_________________?A. water gas
B. destructive distillation of wood
C. methane
D. all