Question # 1

A half cell reaction is one that

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Occurs at one electrode

Goes only half way to completion

Involves a half mole of the concentration of the solution

Always oxidizes

According to Arrhenius theory an acid is defined as substance which

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Accepts and electron pair

Donatees H+ ion in ammonia

Contains Cl- ions

Furnishes H3O + ion in water

If Principal quantum number n = 4 the quantum number l can have calue.

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1,2,3 and 4

0,1,2 and 3

1,2 and 3 only

None of the abvoe

The molarity of a 500 mL solution containing 4 g NaOH

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0.1

0.2

0.3

0.4

A system is said to be in the colloidal state if the particle size of the dispersed phase ranges from

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_o

I to 10 A

10 to 10000 A

10 to 100 A

1000 to 10000 A

The electronic configuration of chromium (Z =24) in the ground state is.

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[Ar] 4s² , 3d⁴

[Ar] 3d⁶

[Ar]4s¹, 3d⁵

[Ar]

If for a solution of an electrolyte. It is the transport number of the cation, then the transport number of the anion I, is equal to

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t/2

1 - t+

1 + t+

(i -t) /2

The correct order of acid strength is.

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HIO4 > HBrO4 > HCIO4

HCIO4> HBrO4 > HIO4

HBrO4 > HIO4 > HCIO4

HBrO4 > HCIO4 > HIO4

In an adiabatic system, if work in done, the temperature must.

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Increase

Decrease

Remain the same

Increase than decrease

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

The angle of rotation in a polarimeter depends on.

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Nature of the compound

Nature of the solvent

Wavelength of the light used

All above factors.

The possible sub levels in the n = 4 energy level are.

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s,p,d

s,p,d,f

s

s,p

Which is the following is not a buffer.

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H2CO3/HCO3

NH4Cl/NH4OH

CH3COOH/CH3COONa

NH3OH/CH3COOH

Branch of chemistry that deals with the basic principles governing energy changes during various processes is called.

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Wave mechanics

Chemical kinetics

Chemical thermodynamics

Electro chemistry

Which of the following solution would have the largest depression in freezing point.

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1% glucose

1 % KCl

1 % AlCl3

1 % BaCl2

Poise is a unit of.

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Refractive index

Optical activity

Fluidity

Viscosity

For a given mass of a gas if temperature increase

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Pressure and volume remain Constance

Volume increases provided pressure is kept constant

Pressure decreases provided volume is constant

Both volume and pressure decrease

Which of the following can act both as a Bronsted acid and a Bronsted base.

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Na2CO3

OH-

HCO3-

NH3

Which of the following is not a colligative property.

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Elevation of B.P.

Depresaion in F.P

Viscosity

Osmotic pressure

Which of the following statement is incorrect about rock salt type

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It has for arrangement of Na+

Na+ and Cl- ions have coordination number of 6:6

A unit cell of NaCl metals have rock salt type structure.

None of them

The correct order of acidic strength is.

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HF < HCl< HI < HBr

HI <HBr < HCl < HF

HI < HBr < HF < HCl

HF < HCl < HBr < HI

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