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Chemistry

Chemistry
The smog is essentially caused by the presence of

Oxides of N and S
O2 and N2
O3 and N2
O2 and O3

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Chemistry
The nuclear particles which are assumed to hold the nucleons together are

neutrons
mesons
electrons
positrons

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

O+2
O-2
O-22
O2

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Chemistry
Which of the following phenomenon is considered responsible for Global Warming?

Fire in coal mines
Trade winds
Greenhouse effect
Dry farming

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Chemistry
The gas produced in marshy places due to decomposition of vegetation is

Methane
Carbon monoxide
Sulphur dioxide
Carbon dioxide

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Chemistry
The important ore of aluminium is

Fluorspar
Cryolite
Bauxite
Haematite

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