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Chemistry

Chemistry
0.01 mole of NaOH is added to 10 liters of water. The pH of water changes by

6
7
3
4

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Chemistry
Which metal is the heaviest in periodic table among the following ?

Pb
Os
W
Pt

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Chemistry
If all bullets could not be removed from gun shot injury of a man, it may cause poisoning by

Mercury
Iron
Lead
Arsenic

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Chemistry
Silk fibre chemically is :

Carbohydrate
Fat
Cellulose
Protein

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Chemistry
Tar roads get damaged if there is

Stagnation of water on road
No maintenance
Heavy traffic
No sloping

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Chemistry
The depletion of ozone layer is due to

Ethane
Chloro fluoro carbon
Carbon dioxide
Sulphur dioxide

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