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Chemistry

Chemistry
The value of Avogadro Number is

6.023 × 1022
6.023 × 1023
6.023 × 1024
6.023 × 1025

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Chemistry
Stains of rust on clothes can be removed by :

Oxalic acid
Alcohol
Petrol
H2O2

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Chemistry
The new strain of bacteria produced by biotechnology in alcohol industry is

Pseudomonas putida
Saccharomyces cerevisiae
Bacillus subtilis
Escherichia coli

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Chemistry
Which of the following is usually not an air-pollutant?

Nitrous oxide
Hydrocarbons
Sulphur dioxide
Carbon dioxide

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Chemistry
Which one of the following is most electronegative

Lead
Silicon
Tin
Carbon

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Chemistry
The gas involved in Bhopal incident was

Nitrogen dioxide
Methyl isocyanide
Methyl chloride
Hydrogen sulphide

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