Question # 1

Whenever a reaction is endothermic, then it means that

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Heat is transferred from surrounding to the system

Heat is transferred system to the surrounding

Heat content of the product is greater than that of reactants

Heat content of the reactants is greater than the products

Which of the following statements is not correct regarding bonding molecular orbitals

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Bonding molecular orbitals possess less energy than atomic orbitals from which they are formed

Bonding molecular orbitals have low electron density between the two nuclei

Every electron in the bonding molecular orbitals contributes to the attraction between atoms

Bonding molecular orbitals are formed when the electron waves undergo constructive interference

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

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Remain unchanged

Increase four times

Reduce to 1/4

Be doubled

At constant temperature in a given mass of and ideal gas.

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The ratio of pressure and volume remains constant

Volume always remains constant

Pressure always remains constant

The product of pressure and volume remains constant

All radio active disintegration nuclear reaction are of.

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First order

Zero order

2nd order

Third order

The shielding effect of the inner electrons is responsible for

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Increasing ionization energy values

Decreasing ionization energy values

Increasing electron affinity

Increasing electonegativity

Both CH4 and NH3 are four electron pair system the angles of CH4 and NH3 are 109.5^o and 107.5 ^o respectively. This deviation is due to.

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Hydrogen bonding in ammonia

Lone pair attraction

Lone pair occupy more space and repel to other bond pairs

Lone pair lone pair repulsion

Maximum number of electrons in f-subshell is.

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2

6

10

14

Which is not a molecular ion.

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He+

CH3+

NH3-

CO+

Carbon atom in methane in hybridized.

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sp3

Sp2

Sp

dsp3

Which of the following precautions in necessary for smooth filtration

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The filter paper should be of big size

The tip of funnel should not touch the side of the beaker

The stem of the funnel should be very small

The stem of he funnel should remain continuously full of liquid

The real gas obeying Van der Waal's equation will resemble ideal gas is.

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both 'a' and 'b' are large

both 'a' and 'b' and small

'a' is small and 'b' is large

'a' is large and 'b' is small

In methanol, bond between carbon and oxygen.

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Ionic

Non polar

Polar

Co - ordinate

Drying agent used in crystallization is.

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P2O3

Animal charcoal

KMnO4

Water

______ Molecule has zero dipole moment.

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CO

H2S

SO2

CH4

Which element has highest ionization potential.

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Li

B

Be

C

Electromotive force of the cell is the

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Difference of two electrode potentials

May be sum or the difference of two electrode potentials

Sum of two electrode potential

Depends upon the nature of the cell

The net change in a chemical reaction is same whether it takes place directly or indirectly is

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Henry's law

Charles's

Hess's lass

Graham's law

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