Question # 1

which chlorine compound has bonding that can be described as ionic with some convalent character?

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NaCI

MgCI₂

AICI₃

SiCI₄

The value of critical temperature of a gas depends upon its:

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Size

Intermolecular forces in it

Shape

All of above

If absolute temperature of a gas is doubled and the pressure is reduced to one half, the volume of the gas will:

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reduced to 1/4

be double

increases four times

remains unchanged

Optimum PH rang for amylases is

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6 - 6.4

6.4 - 6.6

6.4 - 6.9

6.6 - 6.9

If a reaction involves only solids and liquids, which of the following is true?

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ΔH = ΔE

ΔΗ =ΔΕ

ΔH>ΔΕ

AH =AE +nRT

Which pair of transition elements shows abnormal electronic configuration?

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Sc and Zn

Cu and Sc

Zn and Cu

Cu and Cr

Strong dipole-dipole forces among the liquid molecules are responsible for

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very high heat of vaporization

very low heat of vaporization

cannot be predicted

negligible forces are these

The vapour pressure of a liquid depends upon

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amount of the liquid

surface area

temperature

size of container

Which of the following are not known to form compounds in more than one oxidation state?

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Transition metals

Halogens

Alkali metals

Noble gases

Which is the drived lipid?

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Common fats

Vitamin-D

Common oils

Spinolipids

The gases in the atmosphere are essential for sustaining life on earth. Thus oxygen is required for breathing. What for is carbon dioxide required

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To help plant to under go photosynthesis

To destroy nitrogen oxide from the atmosphere

To help to clean the atmosphere

To help in fixing of bacteria

What is the molarity of H₂SO₄solution that has density of 1.84 gm/cc at 35°C and contains 98% by weight?

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4.18 M

8.14 M

18.4 M

18 M

The oxidation state of an element is zero when

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It forms an oxide

It forms hydride

It is in free state

Only for noble gases

The hydrocarbons having double bonds normally end with suffix

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Ane

Ene

Yne

Oic

18 g glucose is dissolved in 90 g of water. The relative lowering vapor pressure is equal to :

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1/5

5.1

1/51

6

Enzymes are

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Proteins

Minerals

Oils

Fatty acids

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Rate is independent of concentration of water since it is in excess

Rate is independent of concentration of ester since it is in exces

Rate depends upon the concentration of acid catalyst added

Rate = k[CH₃COOC₂H₅]^1/2[H₂O]^1/2

Which are used as essences(flowers)?

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aldehydes

Ketones

alcohols

esters

0.5 M of H₂SO₄is diluted from 1 litre to 10 litre, normality of resulting solution is

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1 N

0.1 N

10 N

11 N

For a given process, the heat changes at constant pressure (q_p) and at constant volume (q_v) are related to each other as

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q_p= q_v

q_p< q_v

q_p= qv/2

Aledehydes ketones can be prepared form alcohols by their:

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Reduction

Oxidation

Decomposition

Synthesis

The prosthetic group in glycoprotein is

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Carbohydrate

Fat

Vitamin

Nucleic acid

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