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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-2
O-22
O+2

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Chemistry
The material known in commerce as Terylene is a

Synthetic fibre
Natural fibre
Blend of cotton and silk
Modified natural fibre

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Chemistry
Which among the following is a carbohydrate ?

Hydrogen peroxide
Nylon
Cane-sugar
Turpentine

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Chemistry
How many neutrons does iron have

30
26
13
8

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Chemistry
Black lung disease occurs in people working in

Electroplating industry
Organic solvents industry
Coal mines
Paint manufacturing industry

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Chemistry
The substance most commonly used as a food preservative is

Acetic acid
Sodium carbonate
Tartaric acid
Sodium salt of benzoic acid

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