Question # 1

the substance which increase the rate of reaction but remains unchanged at the end of the reaction is called.

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Indicator

Promoter

Catalyst

Activated complex

An excess of aqueous silver nitrate is added to aqueous barium chloride and precipitate is removed by filtration. What are the main ions in the filtrate

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_________ was derived by C.M Guldberg and P Waage in 1864

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Law of conservation of Mass

Law of mass action

Law of conservation of energy

Distribution law

The pH of human blood is

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7.0

7.4

4.0

6.5

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

pKa of CH3COOH is 4.74. The pKb value of CH3COO- ions will be

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7

14

9.26

zero

Le-Chatelier Braun principle is sometimes known as

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Law of mass action

Law of mobile equilibrium

Law of active mass

All of these above

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

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Ni

Fe

Pt

V2O5

A solution will be unsaturated if

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Ionic product = Kap

Ionic product < Ksp

Ionic Product > Ksp

both 'a' and 'b' are correct

For which system does the equilibrium constant K_chas units of (concentration)^-1

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The value of pH and P^oHof pure water at 25° C is

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14

7

1 x 10^-14

1 x 10¹⁴

The solubility product of AgCI is 2.0 x 10^-10mol²dm^-6The maximum concentration of Ag⁺ions in the solution is

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2.0 x 10^-10mol dm^-3

1.41 x 10^-5mol dm^-3

1.0 x 10^-10mol dm^-3

4.0 x 10^-20mol dm^-3

Buffer action can be explained by

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Common ion effect

Law of mass action

Le Chateller's principle

All above

pH of buffer is calculated by.

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Sorenson equation

Mosley equation

Henderson equation

De broglie equation

A solution has pH zero. Its H+ ions concertation will

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zero

More than unity

Less than unity

Unity only

If the volumes of reactants and products are same in a gaseous phase reaction, then the equilibrium state is not affected by

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Change of temperature

Change of pressure

Change of concentration

Catalyst

Some impurities of MgCl2 are present in NaCl which separation technique can be used to separate the impurities.

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Filtration

Crystallization

Common ion effect

Chromatography

A buffer solution can be prepared by mixing

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Weak acid and its salt with weak base

Weak base and its salt with strong acid

Strong acid and its salts with weak base

Strong base and its salt with weak acid

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