Question # 1

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

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Remain uncharged

Double

Reduced

Increased four times

Beryllium differs from other elements of group Il-A due to

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high charge density

comparatively high nuclear charge

small radius

all above

The number of Na+, ions which surround each Cl- ion in the NaCl crystal lattice is

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8

12

6

10

Collagen is a fibrous protein present most abundantly in

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heart

nucleus

connective tissues

Arteries

which one of the following statements bout negative ions is incorrect?

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they are also know as anions

they are formed when atoms gain electrons

they are large than the atom from which they were formed

they are smaller than the atom from which they were formed

When gaseous chemicals are transported y road or by rail they are classified as follows:
flammable non-flammable poisonous
which gas is poisonous:

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butane

non-flammable

hydrogen

sulphur dioxide

The motion imparted to the gas molecules by gravity is

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very small

very large

negligible

appreciable

The volume of 2.8 g of CO at 27°C and 0.0821 atm is

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30 dm³

3 dm³

0.3 dm³

1.5 dm³

Albumins are separated by

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1/2 saturated ammonium sulfate

Full saturated ammonium sulfate

20% saturated ammonium sulfate

60% saturated ammonium sulfate

An ideal gas obeying kinetic gas equation can be liquefied if

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Its temperature is more than critical temperature

Its pressure is more than critical pressure

Its pressure is more than critical pressure but temperature is less than critical temperature

It cannot be liquefied at any value of P and T

Which polymerization is free radical mechanism based

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Addition

Condensation

Both a and b

None

Kolb's method is not useful for the production of

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Methane

Ethane

Propane

Butane

Rate of chemical reaction depends upon :

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The number of total collisions per second.

Number of molecules taking part in a chemical reaction.

Number of fruitful collisions per second

Number of fruitless collisions per second.

The increase in size of the anion is due to:

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Increase in electron-electron repulsion

Increase in valence shell electrons.

Decrease in valence shell electrons.

Both (a) and (b).

The geometrical shape of a transition complexion is related to the state of hybridizing of the central atom. What is trigonal bipyramidal

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sp³

dsp²

dsp³

d²sp³

Which of the following does not exhibit the periodicity in properties of the elements?

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Ionisation energy

N/P ratio

Electronegativity

Atomic radius

The reaction of sodium with ethanol gives

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CH₃OH

NaH

H₂O

H₂

Which of the following fertilizers is useful for paddy rice

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Ammonium nitrate

Ammonium sulphate

Urea

Ammonium chloride

When a nitrogeneous base combine with a sugar it is called

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Ribose

Nucleotides

Nucleoside

None

Na reacts with phenol to produce

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H₂gas

Benzene

CO₂gas

CO gas

The rate constant k of a reaction activation energy Ea and temperature are related by Arrhenius in the form of an equation which is

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Diethyl ether is obtained by Williamsons synthesis using

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Ethanol + Na + C₂H₅Br

Ethanol + Mg + C₂H₅Br

Methanol + Na + CH₃Br

Methanol + Mg + CH₃Br

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