Question # 1

Which one of the following is not use of acetic acid.

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Coagulant for rubber latex

Local irritant

Formation of rayon and silk

Formation of alcohol

Out of all the elements of Group V-A the highest ionization energy is possessed by

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N

P

Sb

Bi

SO2 is not absorbed in water directly to form H2SO4 because.

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The reaction does not go to completion

The reaction is quite slow

The reaction is exothermic

SO3 is insoluble in water

The element of 2nd period, which has highest ionization energy from the following is

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Be

C

N

O

Galvanized iron is protected by a thin layer of

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Cr

Zn

Sn

Pb

Chemical composition of colemanite is

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Ca₂B₆O₁₁. 5H₂O

CaB₄O₇. 4H₂O

Na₂B₄O₇.4H₂O

CaNaB₅O₉. 8H₂O

Chile saltpeter has the chemical formal

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NaNO₃

KNO₂

Na₂B₄O₇

Na₂CO₃.H₂O

The macro nutrients are required in ranging from

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5 kg to 200 kg

5 kg to 200 g

6g to 200 g

1 kg to 100 kg

The yellowish colour in photochemical smog is due to the presence of.

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NO

NO2

SO2

CO2

Which elements are needed for healthy growth of plants

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N,S,P

N,Ca,P

N,P,K

N,K,C

Synthetic rubber is made by polymerization of.

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Chloroform

Acetylene

Divinylactylene

Chloroprene

Third abundant element on earth crust is.

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Boron

Oxygen

Aluminium

Silicon

Which of the following elements is not present abundantly in earth's crust.

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Silicon

Aluminium

Sodium

Oxygen

When acetylene is heated at 300 ^oC in copper tube, the product obtained is.

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Benzene

Alkyl benzene

Ether

Alcohol

Dennturing of protein is

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Hydrolysis of protein

Unfolding of protein

Three dimensional twisting and folding of peptide chain

Developing hydrogen bonding in peptide chain

Which one of the following compounds is most abundant is nature.

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glucose

Starch

Cellulose

Fructose

Which one of the following metal cannot evolve hydrogen from acetic acid.

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Sodium

Potassium

Magnesium

Zinc

Which one of the following elements has the same oxidation number in all its known compounds.

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Beryllium

Nitrogen

Sulphur

Chorine

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