Question # 1

In the formation of Hl the change of pressure result

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Shift toward forward direction

Shift toward backward direction

Equilibrium will not be effected

First shift forward then backward

Hydrogen gas and iodine vapours combine to form HI at 425°C/ The same composition of mixture is present if we start with decomposition of HI. It suggests

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Law of mass action

A static equilibrium

Irreversible reaction

A dynamic equilibrium

The defects in the Mendeleev's Periodic table is/are:

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in spite of their different properties, alkali metals and coinage metals have been grouped together

K(at.wt.39.1)has been placed after argon (at.wt.39.9)

similar elements lime Cu and Zn have been placed different groups

all above statement are correct,

The process in which ionization of an electrolyte is suppressed by the addition of another strong electrolyte containing one same ion is called:

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Electrolysis

Hydrolysis

Common ion effect

pyrolysis

The solubility of CaF₂is 2.0 x 10^-4g dm^-3, then K_spof CaF₂is

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4.0 x 10^-8

3.2 x 10^-11

2.0 x 10^-8

4.0 x 10^-12

Which of the following is intermediate hydride

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MgH₂

NH₃

HF

NaH

The solubility product of AgCl is 2.0 x 10^-10mol²dm^-6. The 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

The most abundant metal present in the human body is

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Ca

Fe

K

Na

The value of K_c

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does not change with the increase in temperature

changes with change of temperature

does not change with the decrease in temperature

none of these

Which element is the most electro positive in periodic table

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Barium

Calcium

Potassium

Cesium

Which statement is incorrect for a buffer solution

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A solution of strong acid and salt of this acid with strong base

A solution of weak base and salt of this base with strong acid

A solution of mixture of weak acid and its salt with strong base

A solution which resists the change in its pH value by adding small quantity of acid or base

pH of pure water is:

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0

9

14

7

Equilibrium mixture contain ammonia in Haber process

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25%

35%

30%

45%

Elements whose atoms have two outermost shells incomplete are called:

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s-block elements

p-block elements

d-block elements

f-block elements

The atomic radius increases as we move down a group because

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Effective nuclear charge increases

Atomic mass increases

Additive electrons are accommodated in new electron level

Atomic number increases

Common ion effect finds extensive application in the:

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Qualitative analysis

Quantitative analysis

Preparations of buffers

Both (b) and (c)

The group number of element in periodic table indicates

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Valency with respect to hydrogen

The number of electron in the outermost shell

The atomicity

Number of shell

If Kc is very small than reactants are in

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Small amount

Large amount

Normal amount

Equal to product

A solution having pH = 4 its OH^-ion concentration in mol dm^-3is

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1 x 10^-4

1 x 10^-10

1 x 10^-14

1 x 10^-12

The sum of pH and P^OHis

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2

7

14

11

f block elements are also called

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Outer transition element

Inner transition elements

Alkaline earth elements

Coinage earth metal

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