Question # 1

The pH of neutral water is 6.8 then the temperature of H2O is

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25°C

More than 25°C

less than 25 C°

Not predicted

At equilibrium, the concentration of reactants and products are

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Constant

Maximum

Different

Equal

If the temperature is inereased of following reaction, then will go in N2 +3H2 <---------> .2NH3, ∆H= -Ve

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Forward direction

Reverse direction

Remain constant

Cannot be predicted

The solubility product is only applicable for those substance whose molar concentrations is

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0.01

Equal to 1

Less than 0.01

Greater than 10

pH of 10-4 mole dm-3 of HCl

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2

4

3

5

The value of Kc for H2O at 25C° is

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1x10 (-14)mole dm-3

14 mol dm-3

1.86×10(-16) mol dm-3

1.0x10 (-7)moldm-3

Buffer solutions are used in except

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Clinical analysis

Nutrition

Soil science

Qualitative analysis

A certain buffer solution contains equal cone. of X- and HX. Ka for HX is 10(-8). The pH of buffer is

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3

11

8

14

With increase in temperature, ionic product of H2O

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Decreases

Remains same

Increases

May increase or decrease

In which of the following Equilibria will Kc and Kp have not the same value

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2HI <--------> H2+I2

2SO2 + O2 <--------> 2SO3

N2 + O2 <---------> 2NO

All of these

Which one is correct about conjugate acid-base concept?

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Conjugate base of a very weak acid is relatively very strong

Conjugate base of a very weak acid is relatively very weak

Conjugate base of a very strong acid is relatively very weak

Both A and C

If Kc value is small then equilibrium position will shift

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Towards left

Remains unchanged

Towards right

lt is always constant value

In a given system, water and ice are in equilibrium, if the pressure is applied to the above system then

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Morc ice is formed

Amount of ice and water will remain the same

more ice is melted

both A and B

If ionic product is equal to Ksp then the solution is

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Unsaturatec

Ideal

Supersaturated

Saturated

The units of ionic product of H2O is

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Mole dm-3

Mole2 dm-6

Mole-1 dm-3

Mole-2 dm-6

The oxidation of SO2 to SO3 is exothermic reaction. The yield of SO3 will be maximum if

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Temperature is increased and pressure is kept constant

Temperature is reduced and pressure is increased

Both temperature and pressure are increased

Which one is very weak acid

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HF

HCI

H2CO3

H2O

A basic buffer solution can be prepared by mixing

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Strong acid and its salt with weak base

Weak base and its salt with strong acid

Strong base and its salt with weak acid

Weak acid and its salt with strong base

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

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Ag+ and NO3-, only

NO3- and Ba+2 only

Ag+ and NO-3, and Ba+2 only

CI- and NO-3, and Ba+2 only

For the reaction H2(g) +I2 (g) <---------> 2Hl(g). The equilibrium constant changes with

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Total pressure

Catalyst

Concentration of H2 and I2

Temperature

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