Question # 1

Which makes a molecule more stable.

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Greater localization of pi electrons

Less delocalization of pi electrons

Greeter delocalization of pi electrons

Less delocalization for pi electrons

What is %age of calcium phosphate in bone ash

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20

40

80

60

When carbon di oxide is bubbled through lime water, white precipitate is formed This precipitate is.

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COCl2

H2CO3

CaO

CaCO3

The reactivity of Grignard's regent is due to

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Polarity of Mg-x bond

Polarity of C-Mg bond

Electro negativity of halogen atom

Presence of Mg-atom

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

In which country first of all paper was invented

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USA

China

Egypt

Germany

Which woody raw material is used for the manufacture of paper pulp

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Cotton

Biogases

Rice straw

Poplar

Some non protein portion attached to the protein is called.

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Prosthetic group

Secondary protein

Transport protein

All of these

What products is formed when ethyl bromide reacts with magnesium to form Grignard's reagent.

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Pyridine

Anhydrous ether

Ethyl alcohol

Carbon tetrachloride

Fats are

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Saturated glycerides

Unsaturated glycerides

Polyhydroxy ketose

Polyhydroxy aldose

Phenol is the derivative of

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Alkane

Aromatic hydrocarbon

Aliphatic hydrocarbon

Alkene

Which of the following is an addition polymer

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Polyester

Polystyrene

Nylon 6,6

Terylene

Water will be considered polluted if it has dissolved oxygen.

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3ppm

4ppm

5ppm

6 ppm

A polymeric substance that is formed in the liquid state and then hardened to a rigid solid is called a

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fibre

plastic

varnish

polyamide resin

Thickness of the atmosphere is

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100 km

500 km

1000 km

1500 km

Which compound is the most reactive one

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benzene

ethene

ethane

ethyne

The isomers always have same

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Chemical properties

Structural formula

Molecular formula

Physical properties as well as chemical properties

S_N2 mechanism involves

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1st order kinetics

2nd order kinetics

3rd kinetics

zero order kinetics

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