Question # 1

Quantum number value for 2p sub shell are

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n = 2, I = 1

n = 1, l =1

n = 1, l = 0

n = 2, l = 0

The volume occupied by 1.4 g of N2 at S.T.P is

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2.24 dm3

22.4 dm3

1.12 dm3

112 cm3

More abundant isotope of an element is the one with.

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Even atomic number

Odd atomic number

Even mass number

Odd mass number

If salt bridge is not used between two half cells, than the voltage.

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Decreases rapidly

Decreases slowly

Does not change

Drops of zero

The change in heat energy of a chemical reaction at constant temperature and pressure is called

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Enthalpy change

Bond energy

Heat of sublimation

Internal energy change

Standard enthalpy of combustion of carbon is -394 kJ mol-1 than, which is the standard enthalpy of formation of CO2

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+394 kJ

-394 kJ

0 kJ

+197 kJ

Which one of the following salts dissolved in water to form a solution with a pH greater than 7

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NaCl

CuSO4

Na2CO3

NH4Cl

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.

The nature of positive rays depends on

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The nature of electrode.

The nature of discharge tube

The nature of residual gas

All of the above

Calorie is equivalent to

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0.4184 J

41.84 J

4.184 J

418.4 J

Energy and wavelength of a photon are related as.

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Direct

In direct

No correlation

Inverse under root

Catalyst used in preparation of NH3 from N2 and H2 is.

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Ni

Fe

Pt

V2O5

Chromatography involves the distribution of a solute between.

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Two stationary phases

Two mobile phases

A stationary phase and a mobile phase

Two stationary and two mobile phase.

Which has greater reduction potential

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Na

H2

Zn

F2

What type of bonding is present in NH4Cl

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Ionic

Covalent

Co ordinate covalent

All of these

Splitting of spectral lines when atoms are subjected to strong electric field is called

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Zeeman effect

Stark effect

Photoelectric effect

Compton effect

For a given process, the heat change 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> q_v

q_p= q_v/2

Photosynthesis a photochemical reaction has order of reaction

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0

1

2

Fractional order

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