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Chemistry

Chemistry
Supersonic jet causes pollution by thinning of

SO2 layer
CO2 layer
O 2 layer
O3 layer

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Chemistry
The compound used in pricklyheat powder to prevent excessive sweating is

Carbonic acid
Sulphuric acid
Boric acid
Phosphoric acid

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Chemistry
Which one of the following elements exhibits the greatest tendency to lose electrons ?

Oxygen
Fluorine
Lithium
Zinc

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

O-22
O-2
O+2
O2

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Chemistry
The most abundant element in the earth’s atmosphere is

Krypton
Argon
Nitrogen
Oxygen

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Chemistry
The gas that causes suffocation and death when coal or coke is burnt in a closed room is

Methane
Ethane
Carbon di-oxide
Carbon monoxide

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