Question # 1

The cause of minamata disease is the pollution of

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Arsenic (As) into atomosphere

Industrial waste having Hg

Organic waste in drinking H₂O

Oil spills in H₂O

What forces operate between ethyl group of ethyl alcohol and oxygen of water

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H-bonding

attractive forces

repulsive forces

dipole forces

Oceans, rivers, streams, lakes, polar ice caps, glaciers and group water reservoirs are included in:

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atmosphere

lithosphere

hydrosphere

biosphere

In a closed vessel a gas is heated from 300 K to 600K The kinetic energy becomes remains

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Double

Same

Half

Four times

Li resembles with Mg, because

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the ratio of their charge to size is nearly the same

both have nearly same size

both are metallic in nature

both are found together in nature

Acetylide can give back ethyne upon treatment with

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water

strong base

dil. Acid

weak base

The system in which all the three axes are unequal and are at righ angle to each other is called

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cubic

hexagonal

orthorhombic

tetragonal

All the following statements are incorrect except:

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all of the gases cannot be liquefied

increase of pressure will not decrease the inter molecular distance in a gas

gas molecules do not attract each other at very low temperature

actual volume of a gas is not negligible at very pressure

Which one of the following is not a form of chemical bonding?

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covalent bonding

hydrogen bonding

ionic bonding

metallic bonding

Which of the following statement is not true?

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The pressure of a gas is due to collision of the gas molecules with the walls of the container.

The molecular velocity of any gas is proportional to the square root of the absolute temperature.

The rate of diffusion of a gas is directly proportional to the density of the gas at constant pressure.

Kinetic energy of an ideal gas is directly proportional to the absolute temperature.

On electrophoresis for plasma proteins using buffer of pH 8.6

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The proteins are neutral

The proteins carry negative charge

The proteins carry positive charge

The proteins are easily precipitated

Which is not property in ether:

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Very weak hydogen bonding

High b.p

Slightly soluble

Inflammable

Alcohols are derivatives of:

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Alkanes

Alkens

Alkynes

Benzene

Which one of the following is a water soluble vitamin

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D

K

A

Ascorbic acid (Vic C)

P₂O₅is heated with water to give

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Hypophosphorus acid

Phosphorus acid

Hypophosphorus acid

Orthophosphorus acid

The development of disagreeable odur in fats or oil is called

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Fragrance

Perfume

Rancidity

Smell

Molar mass of high molecular w.f. polymers ranges from:

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1000 to 10000

10000 to 100000

100000 to 1000000

1000 to 100000000

The nature of positive ray depend on:

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The nature of electrode.

The nature of discharge tube.

The nature of residual gas.

All of above.

Compound X has molecular formula C₁₀H₁₄O and is unreactive towards mild oxidising agents. What is the structure of the compound formed by dehydration of X

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When aqueous NaCl is electrolyzed, which of the following ions get discharged at anode :

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H⁺

Na⁺

OH^-

Cl^-

Sodium is never found free in nature because of its

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Chemical reactivity

Small ionic size

Small atomic volume

None of these

The functional group isomer of dimethylether is

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Ethyl alcohol

Propyl alcohol

Diethyl ether

Butyl alcohol

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