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Chemistry

Chemistry
Percentage of lead in lead pencils is

31-66
40
80

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Chemistry
Which one is the most dense liquid from the below

Water
None of these
Gasolin
Choloform

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Chemistry
A subshell with l=2 can take up

8 electron
5 electron
10 electron
3 electron

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Chemistry
Baking soda is :

Sodium hydroxide
Potassium carbonate
Sodium bicarbonate
Sodium carbonate

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Chemistry
The atmospheric gas that is mainly responsible for Green House effect :

Carbondioxide
Oxygen
Nitrogen
Ozone

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Chemistry
Dry ice is the solid form of :

Air
Carbon di–oxide
Water
Nitrogen

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