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Chemistry

Chemistry
Which one of the following species has the highest bond order, shortest bond length and maximum bond strength

O2
O-22
O+2
O-2

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Chemistry
The most commonly used chemicals in the artificial rainmaking or cloud seeding are

Sodium Chloride (NaCl)
Dry Ice (Frozen CO2)
Silver Iodide (Ag I)
All of these

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Chemistry
The most abundant element in the human body is

Nitrogen
Oxygen
Iron
Carbon

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Chemistry
The monomer of polythene is

ethyl alcohol
None of these
ethylene
vinyl chloride

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Chemistry
Interveinal necrotic spots on leaves appear due to

HF injury
O3injury
SO2injury
NO2injury

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Chemistry
Food cans are coated with tin and not with zinc because

Zinc is less reactive than tin
Zinc is more reactive than tin
Zinc is costlier than tin
Zinc has a higher melting point than tin

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