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Chemistry

Chemistry
Earth’s atmosphere is an envelope of gases extending to a height of

300 km
150 km
100 km
200 km

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Chemistry
Pyrethrin used in mosquito coil is obtained from

A seed plant
A fungus
An insect
A bacterium

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Chemistry
Two electrons in an orbital are differentiated by which of the following ?

Azimuthal quantum number
Magnetic quantum number
Principal quantum number
Spin quantum number

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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
D
A

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Chemistry
In galvanization, iron is coated with

Tin
Nickel
Copper
Zinc

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Chemistry
The gas that is used in the manufacture of vanaspati ghee is :

Nitrogen
Carbon dioxide
Oxygen
Hydrogen

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