Question # 1

Helical structure of proteins is stabilized by

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Peptide bond

Dipeptide bond

Van der Wall's forces

Hydrogen bonding

The value of Kc for H2O at 25C° is

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1x10 (-14)mole dm-3

14 mol dm-3

1.86×10(-16) mol dm-3

1.0x10 (-7)moldm-3

The fibre which is made from acrylonitrile as monomers

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PVC

Rayon fibre

Acrylic fibre

Polyester fibre

A single chloride free radical can destroy the ozone molecules

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100

100000

10000

10

Ethylene polymerizes at 100 atm pressure and 400 °C to give

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Polybenzene

Polypropylene

Polyalcohol

Polyethylene

The region of earth capable of supporting life is

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Hydrosphere

Lithosphere

Biosphere

Atmosphere

Which noble gas is used in mixture used for breathing by divers?

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Ge

Ar

Kr

He

Propanone does not undergo

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Oxime formation

Reduction of Fehling solution

Hydrazone formation with hydrazine

Reaction with HCN

Steam causes more seers burns than boiling water. It is due to

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Latent heat of fusion

Latent heat of vaporization

Latent heat of sublimation

All of above

Which of the following folymer is used as binder

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PVC

PVA

Acrylic resins

Polyester

Select the name of reedy plant from which word paper is derived:

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Sunflower

Water hyacinth

Papyrus

Rose

Tripple bond is present in

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O₂

H₂

N₂

Cl₂

Saturated solution of NaCl on heating becomes

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Super saturated

Unsaturated

Remains saturated

None

Aliphatic carboxylic acids have carboxyl group attached to:

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Alkyl group

Aryl group

Phenyl group

Benzyl lgroup

Which isomer of C₅H₁₁OH gives, one dehydration, the greastest number of different alkenes

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Ionization is the process in which ionic compounds when fused or dissolved in water split up into charged particles called :

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Atoms.

Electrons.

Protons .

Ions

For the above reaction the relationship b/w k_c and k_p will be :

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K_p = K_cRT

Kp = K_c(RT)_-1

K_p = K_c(RT)_-2

K_c = K_p

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Br_2(aq)

2, 4-dinitrophenylhydrazine

NaBH

Tollen's reagent

Oleum is

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Castor oil

Oil of vitriol

Fuming of H₂SO₄

None of them

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Le-chatlier's principle

Only adding catalyst

Decreasing pressure

Decreasing temperature

The rate of reaction :

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Increase as the reaction proceeds.

Decreases as the reaction proceeds.

Remains the same as the reaction proceed.

May decrease or increase as the reaction proceeds.

Acetylene when treated with 10% H₂SO₄in the presence of HgSO₄adds one molecule of water to form

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Aldehydes

Esters

Alcohols

Acids

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