Question # 1

The unit of mole fraction is

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Moles dm^-3

Moles kg^-1

Gram dm^-3

None

The value of Rydberg constant is.

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1.6 x 10⁷ m-1

1.9768 x 10⁷ m-1

1.09678 x 10⁷ m-1

1.7904 x 10⁷ m-1

As the quantum number n increases, the energy difference between adjacent energy level.

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Increase

Remain same

Decrease

No correlation

Isotopes are the atoms of same element with similar chemical properties but different

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Atomic number

Atomic volume

Atomic weight

Atomic structure

The true representation for the units of rate constant K for the first order reaction

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sec^-1

mole dm^-3s

mole dm^-3s^-1

mole^-1dm⁺³s^-1

When 5d orbital is completed them entering electron goes into.

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6s

6p

6d

6f

A filtration process could be very time consuming if it were not aided by a gentle suction, which is developed.

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If the paper covers the funnel up to its circumference

If the paper has got small sized pores in it

If the stem of the funnel is large so that it dips into the filtrate

If the paper fits tightly

As compared to pure atomic orbitals the hybrid orbitals have.

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Low energy

High energy

Same energy

None of these

A chemical reaction A ---------- B is said to be in equilibrium when

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Complete conversion of A to B has taken place

Conversion of A to B is 50% complete

Rate of transformation of A to B is equal to B to A

50% Reactant have been changed to B

The pH of 10-3 mole dm-3 of an aqueous solution of H2SO4 is.

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3.0

2.7

2.0

1.5

the value of delta H and delta E for liquids and solids is almost same because.

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No change in temperature

Heat absorbed

No change in volume

Heat evolved

Isomorphic crystals show

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Same chemical properties

Same physical properties

Same crystalline form

Same melting point

Upper consulate temperature for water phenol system is.

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150 ^oC

65.9 ^oC

120 ^oC

130 ^oC

An atomic orbital has l =1 , m =+1, 0, -1, n = 3 than which one of the following atomic orbital has such values.

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2s

2p

3p

3d

Alkali and alkaline earth metal are usually obtained by

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Decomposition of their carbonates

By heating their hydroxide

electrolysis of molten metal oxides

Electrolysis of molten metal halides

During the process of crystallization, the hot saturated solution.

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Is cooled very slowly to get large sized crystals.

Is cooled at a moderate rate to get medium sized crystals

Is evaporated to get the crystals of the product.

Is mixed with an immiscible liquid to get the pure crystals of the product.

That cell in which electrical energy is converted into chemical energy is called

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Galvanic cell

Electrolytic cell

Fuel cell

Daniel cell

Which pair of compound are isomorphic in nature.

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NaCl and KNO3

KNO3 and MgO

MgO and NaF

CaF and CaCO3

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