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Chemistry

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

Iron
Aluminium
Zinc
Copper

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Chemistry
Antacids are found in drugs that give relief to

Stomach ache
Headache
Acne
Eye sight

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Chemistry
German silver used for making utensils is an alloy of

Copper, zinc, nickel
Copper, silver, nickel
Copper, nickel, aluminium
Copper, zinc, aluminium

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Chemistry
In ice, the number of hydrogen bonds per water molecule is

2
8
4
1

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Chemistry
Which one of the following contributes largely to the ‘green house effect’ ?

Water vapour
Carbon monoxide
Carbon dioxide
Ozone

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Chemistry
24 carat of diamond is equal to

91% gold
95% mg
200 g
200 mg

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