Question # 1

Which of the following ion has the highest value of ionic radius?

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Li⁺

F^-

O^2-

B³⁺

The value of K_pis greater than K_cfor a gaseous reaction when

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number of molecules of products is greater than the reactants

number of molecules of reactants is greater than those of products

number of molecules of reactants and products equal

catalyst is added

Mark the elements that belong to the same period:

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Cr, In, Pb

Li, Na, k

H, He,F

Ca,Cr,Zn

If the temperature in the synthesis of ammonia is decreased. The ammonia formation

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Increases

Decreases

No effect

Little change

An atom with high electronegativity has

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Large size

High ionization potential

Low electron affinity

Low ionization potential

Which among the following elements have lowest value of IE₁?

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Pb

Sn

Si

C

The set of elements to which law of octaves applies is:

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Be,Mg,Ca

B, N, C

Ar, K, Ca

Se, Te, As

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

What is the concentration of [H⁺]_aqin 0.5 mol dm^-3solution of concentrated sulphuric acid?

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0.25 mol dm^-3

2 mol dm^-3

0.5 mol dm^-3

1 mol dm^-3

Which of the following is more acidic

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Bananas

Apples

Bread

Lemon

If we increase the pressure in decomposition of PCl₅it will favour the reaction in

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Forward direction

Backward direction

Equilibrium direction

None

Which of the following is a buffer solution

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Brine

Blood

Glue

Solution of CuSO₄

pH of water by addition of base is

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More than 7

Less than 7

Equal to 7

No effect

Make the correct statement:

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Na⁺ is smaller than Na atom

Na⁺ is larger than Na atom

Cl^{-is smaller than Cl atom}

Cl^- (ion) and Cl (atom) are equal in size

The discovery o which of the followin group of elements gave blow to the Newland's law of octaves

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actinides

inert gases

alkaline earths

rare earths

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

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Exactly 7

< 7

> 7

Nearly 7

When the value of K_cis very large

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Reaction forward

Reaction backward

Reaction almost completed

Reaction at equilibrium

The most acidic oxide among the following is:

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CI₂O₇

Na₂O

AI₂O₃

P₄O₁₀

The 14 elements have been placed in VI period and ii group of periodic table. These are called:

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alkali metals

alkaline earth metals

rare earth metals

inert gases

Which of the following is different from other three oxides

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MgO

SnO

ZnO

PbO

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The value of Kp falls with the rise in temperature

The value of Kp falls with increasing pressure

Adding V₂O₅catalyst increases the equilibrium yield of SO₃

The value of Kp is equal to Kc

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