Question # 1

The pink colour of phenolphthalen in in basic medium is due to the

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Cationic form

Anionic form

Natural form

OH- ions of the base

The value of an Einstein

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Is independent of wavelength

Decrease with increase in wavelength

Increase with increase in wavelength

Depends on the temperature of the absorbing system

Which of the following specie is stronger acid than formic acid, HCOOH, in aqueous solution.

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CH3COOH

NH+4

H2SO-3

H4P2O7

Smoke is a dispersion of

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Gas in gas

Gas in solid

Solid in gas

Liquid in gas

In quantum theory, which of the following tells us that the prediction of quantum mechanics must pass smoothly into those of classical mechanics as we progress in a continuous way from microsopic to macroecopic.

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Uncertainty principle

Correspondence principle

Probability distribution

Aufbau principle

When a concentrated solute of an electrolyte is diluted.

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Its specific conductance increases

Its equivalent conductance decreases

The specific conductance decreases and equivalent conductance increases

Both specific and equivalent conductance increase

The reverse of photo chemical reaction is called.

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Phosphorescence

Chemiluminescence

Fluorescence

Photscnaitization

The normality of 2.3 M H2SO4 solution is.

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0.46 N

0.23 N

2.3 N

4.6 N

Which of the following solutions of sulphuric acid will exactly neutralize 25 mL. of 0.2 M NaOH

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12.5 mL of 0.1 M solution

24 mL OF 0.1 m Solution

50 mL of 0.1 M solution

None of the above

At the some temperature 0.1 M solution of urea is isotonic with.

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0.1 M glucose solution

0.1 M NaCl solution

0.1 M urea solution

0.1 M BaCl2 solution

The molecule returns from the first excited triplet sate to the ground state singlet. The light emitted in known as.

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Inter system crossing

Phosphorescence

Fiuoreacence

Quenching

All cycle engines working reversibly between same temperature of source and sink have the same efficiency This is the statement for the.

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Carnot cycle

Carnot theorem

Narnst theorem

Second law of thermodynamics

The law which relates the solubility of a gas to its pressure is called.

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Raoult's law

Nernst law

Ostwald's law

Hennery's law

The rays emitted by the cathode in a gas discharge tube under low pressure and high voltage of electricity are called cathode rays. Which of the following properties are not related to cathode rays.

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These travel in a straight lines.

These are deflected by magnetic and electric field.

Minerals Fluoreace with a characteristic color when placed in a beam of cathode rays.

These are dependent of the material used for the electrode.

Which of the following statement is not related to applications and limitations of first law of thermodynamics.

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This law explains why chemical reactions proceed to completion

It is silent about the source of heat

It is silent about the direction of heat

It does not tell us about the reversible process.

The number of degrees of freedom and number of components for a system of containing undissolved salt , in equilibrium with water vapor are.

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2,2

3 , 2

1 , 1

1 , 2

Which of the following molecules has the lowest average speed at 273 K.

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CO2

CO

CH4

O2

The correct order of acid strength is.

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HIO4 > HBrO4 > HCIO4

HCIO4> HBrO4 > HIO4

HBrO4 > HIO4 > HCIO4

HBrO4 > HCIO4 > HIO4

The equivalent conductance (^) and molar conductance ( ^ m ) of BaSO4 are related as.

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^ = ^m/2

^/2 = ^m

^ = ^m

^ = ^m/4

30 mL of an acid solution is neutralized by 15 mL of 0.2 N base. The strength of acid solution is.

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0.1 N

0.15 N

0.3 N

0.4 N

Which of the following makes the motion of perpetual motion machine a physical impossibility.

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First law of thermodynamics

Second law of thermodynamics

Third law of thermodynamics

The Boltzmann law

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