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Chemistry

Chemistry
Which of the following molecules has a bond order of 2.5

NO
HCL
F2
CO

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Chemistry
The mass number of an atom is equal to

the number of protons and electrons
the number of neutrons
the number of protons
the number of nucleons

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Chemistry
The ionisation energy of hydrogen atom in the ground state is x KJ. The energy required for an electron to jump from 2nd orbit to 3rd orbit is

x/6
7.2 x
5x/36
5x

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Chemistry
In ice, the number of hydrogen bonds per water molecule is

1
4
2
8

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Chemistry
The hydronium ion is

H3O+
HO -
H2+
H+

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Chemistry
In upper layer of atmosphere ozone is formed by

The action of ultraviolet rays on oxygen
The combination of oxygen molecules
The action of nitrogen on oxygen in atmosphere
Subjecting oxygen to high pressure

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