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Chemistry

Chemistry
Which metal does not undergo corrosion due to the formation of oxide layer?

Aluminium
Iron
Zinc
Copper

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Chemistry
Which among the following stage is suitable indicator when solution of sodium carbonate is mixed with sulphuric acid ?

Methylene blue
Phenolphthaline
Methyl red
Methyl orange

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Chemistry
The electronic configuration of an atom having atomic number ‘20’ is

2, 8, 8, 2
2, 8, 10
2, 10, 8
2, 6, 8, 4

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Chemistry
Acid rain is caused due to emission of which of the following in to the atmosphere ?

Oxides of nitrogen and sulphur
Carbon dioxide and carbon monoxide
Ozone and carbon dioxide
Carbon monoxide and nitrogen

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Chemistry
Which one of the following is found in kidney stones?

Calcium oxalate
Sodium oxalate
Sodium chloride
Calcium acetate

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Chemistry
Which of the following is the best fuel in terms of energy released per gram of fuel?

Hydrogen
Ethanol
Butane
Methane

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