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Chemistry

Chemistry
Depletion of ozone layer causes

Skin cancer
Lung cancer
Breast cancer
Blood cancer

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Chemistry
Ozone layer of atmosphere absorbs:

Cosmic rays.
All radiations of Light
Infra-red rays
Ultraviolet rays

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

2
4
1
8

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Chemistry
Match the List-I with List-II and select the correct answer using the codes given belowList-I (Vitamin)List-II(Chemical compound)F.Vitamin A1.ThiaminG.Vitamin B12.RetinolH.Vitamin C3.Ascorbic acidJ.Vitamin E4.TocopherolCodes :FGHJA.4132B.2314C.4312D.2134

B
C
A
D

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Chemistry
The most commonly used bleaching agent is

alcohol
carbon dioxide
chlorine
sodium chlorine

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Chemistry
The metal chiefly used for galvanising iron is :

Cadmium
Mercury
Tin
Zinc

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