Question # 1

The pH of 10^-3mol dm^-3of an aqueous solution of H₂SO₄is

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3.0

2.7

2.0

1.5

The sum of pH and P^OHis

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2

7

14

11

If the concentration of the reactants is increased then the equilibrium will

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Shift towards the forward direction

Shift towards the backward direction

Not be affected

None

The pH of 10^-3mole dm^-3of an aqueous solution of H₂SO₄is

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3.0

2.7

2.0

1.5

Conjugate base of a very weak acid is:

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Relatively strong base

Relatively weak bass

Relatively very strong base

^{Relativelyvery weak base}

element whose outer electronic configuration vary from ns² np to na¹ np⁶constitute:

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s-block elements

p-block elements

d-block elements

f-block elements

The elements with atomic numbers 9, 17, 35, 53, 85 and all

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Noble gases

Halogens

Heavy metals

Light metals

The first attempt to classify the elements of periodic table was made by:

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Newland

Mendeleev

Al-Razi

Dobereiner

The attempt of classification of elements by plotting the atomic weight of elements against their volumes was made by:

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Newlands

Bohr

Lother Meyer

Dobereiner

The element with atomic number 57 belongs to:

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s-block

transition elements

lanthanides

actinides

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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Ag⁺and NO^-₃only

Ag⁺and Ba⁺⁺and NO^-₃

Ba²⁺and NO^-₃only

Ba²⁺and NO^-₃and Cl₃^-

The compound having lowest boiling point is:

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H₂S

H₂Se

SiH₄

SnH₄

The pH value of 0.001M HCI solution in water is:

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Exactly 7

< 7

> 7

Nearly 7

A catalyst is added to a system to change

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the direction of the reaction

the rate of the reaction

the concentration of the reaction

the moleculariy of the reaction

Equilibrium constant in terms of pressure is denoted by

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K₀

K_p

K_c

K_a

The ionization potential is lowest for the

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Halogens

Inert gases

Alkaline earth metals

Alkali metals

Law of mass action was presented by

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Henderson

Lawis

Arrhennius

Guldburg and waag

pH of water by addition of base is

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More than 7

Less than 7

Equal to 7

No effect

The periodic table consists of:

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7 horizontal an 7 vertical series

8 horizontal and 7 vertical series

7 horizontal and 18 vertical series

8 horizontal and 18 vertical series

Which of the following can affect the magnitude of equilibrium constant K_pof a reversible gaseous reaction:

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Temperature

Catalyst

Pressure

All of above

Which of the following oxides is amphoteric in character?

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CaO

CO₂

SiO₂

SnO₂

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