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Chemistry

Chemistry
The maximum number of covalent formed by nitrogen is

4
3
2
1

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

Bacillus subtilis
Escherichia coli
Pseudomonas putida
Saccharomyces cerevisiae

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Chemistry
Photo-oxidation process is initiated by

Heat
Light
Catalyst
Oxygen

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Chemistry
The natural resource, known as black gold is

Platinum
Lead
Coal
Tin

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Chemistry
Among the following the hardest metal is

Gold
Platinum
Iron
Tungsten

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Chemistry
Which of the following will replace hydrogen from acids to form salts ?

Ag
S
Na
P

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