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Chemistry

Chemistry
In addition to hydrogen, the other abundant element present on Sun’s surface is

Argon
Oxygen
Neon
Helium

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Chemistry
The reaction intermediate formed during the preparation of diethylether from ethanol by treatment with H2SO4 is

Carbocation
Carbene
Free radical
Carbanion

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Chemistry
Sulphur dioxide present in the industrial chimney exhaust causes

Corrosion building materials
Reduction in plant's productivity owing to acid rain
Respiratory and lung disease
All of these

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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

D
B
C
A

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

Copper
Aluminium
Iron
Zinc

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Chemistry
Spirit in contact with body gives cool sensation because it is :

Liquid
A good conductor
Transparent
Highly volatile

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