Question # 1

The sum of pH and pOH is:

Choose an answer

10

14

18

7

Element of the same group in the periodic table are characterized by the same:

Choose an answer

ionization potential

electron affinity

number valency electrons

electronegativity

In the long form of the periodic table all the non-metals are placed in

Choose an answer

s-block

f-block

p-block

d-block

Variable valency is generally exhibited by

Choose an answer

Normal elements

Transition elements

Metallic elements

None of these

Which of the following elements is/are not liquid at 30°C?

Choose an answer

Ga

Hg

Ge

Cs

pKa value of acetic acid is 4.76 then pKb value of acid

Choose an answer

4.76

9.24

-9.34

-4.76

Buffer is a solution

Choose an answer

Whose pH may or may not change during a chemical reaction

Which strong enough to maintain its pH

Which resists change in its pH

Whose pH is constant

Idea of pH and POH was put forward by

Choose an answer

Gibbs

Einstein

Sorenson

Le. Chatlier

Law of mass action states that rate of chemical reaction is directly proportional to the product of active masses of the reactants. The term active mass means

Choose an answer

Number of moles

Total pressures of the reactants

Number of moles per dm³of reactants

Mass in grams converted to products

Common ion effect finds extensive application in the:

Choose an answer

Qualitative analysis

Quantitative analysis

Preparations of buffers

Both (b) and (c)

The melting point is lowest for

Choose an answer

Be

Mg

Ca

Sr

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

Choose an answer

Law of mass action

A static equilibrium

Irreversible reaction

A dynamic equilibrium

Buffer solutions are mostly prepared by mixing:

Choose an answer

Three substances

Four substances

Two substances

Five substances

According to the Periodic Law of elements, the variation in properties of elements is related to their

Choose an answer

Atomic masses

Nuclear masses

Atomic numbers

Nuclear neutron-proton number ratios

Which one of the following is a buffer

Choose an answer

HCl + NaCl solution

CH₃COOH + CH₃COONH₄solution

H₂SO₄+ CaSO₄solution

CH₃COOH+ CH₃COONa

If Kc is very small than reactants are in

Choose an answer

Small amount

Large amount

Normal amount

Equal to product

The pH of bananas is:

Choose an answer

3.6

5.5

6.2

4.6

Point out the incorrect statement about metalloids:

Choose an answer

these are good conductors of heat and electricity

these usually act as electron donors with non-metals acceptors with metals

Some of these are B,Ge,Si ect.

these are borderline elements that show metallic and non-metallic character to some extent.

Mark the incorrect statement for periodic classification of elements:

Choose an answer

The first ionization energies of elements along a period do not very in a regular manner with increases in atomic number

the properties of elements are the periodic function of their atomic number

for transition elements the sub-shells are filled with electrons without variation with increases in atomic number

nonmetals are lesser in number than metallic elements

In a vessel containing SO₃, SO₂and O₂at equilibrium, some helium has is introduced so that the total pressure increases while temperature and volume remain constant. According to Le Chatelier's principle, the dissociation of SO₃

Choose an answer

Increases

Decreases

Remain unaltered

Changes unpredictably

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

More Classes

Other Links

MDCAT Chemistry Chapter 7 Chemical Equilibrium Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer