Question # 1

The boiling point of H2O is 100°C while that of C2H5-OH is 78.5C°. The reason is that:

Choose an answer

H2O molecules are small-sized

the bond angles at oxygen atom are different

C2H5-group is electron donating

the number of H-bonds are greater in H20, than C2H5-OH

Temperature required for the dehydration of ethanol into ethene in the presence of HaSOu is

Choose an answer

130°C

170°C

175°C

180°C

Which is not a calcareous material:

Choose an answer

Lime

Marble

Clay

Marine shel

The unit of R depends on

Choose an answer

Mole

Pressure volume

Temperature

None of these

Chemical equilibrium involving reactants and products in more than one phase is called:

Choose an answer

Homogeneous

Heterogeneous

Dynamic

Static

Most harmful of biosphere is

Choose an answer

Deforestation

Nuclear fail out

Salinity

Water logging

Starch is a polymer is of:

Choose an answer

sucrose

fructose

α-D-Glucose

lactose

Water cover earth surface more than:

Choose an answer

50%

60%

70%

80%

One of the environment problem is the formation of oil slicks when oil is spilled from tankers in sea water.

Which treatment is suitable to remove oil slicks

Choose an answer

blow air

add Na₂CO₃

use a specially made sorbent having fluorine trapped in it

Use a sorbent having Al₂O₃trapped in it

An element that is not an essential par of proteins is

Choose an answer

O

N

H

S

The maximum possible number of hydrogen bonds in which a H₂O molecule can participate is:

Choose an answer

1

2

3

4

When of the following is isolelectronic with krypton

Choose an answer

Ca⁺⁺

Al⁺⁺⁺

Br^-1

I^-1

Hypo is used in photography for

Choose an answer

Developing picture

Picture printed

The colour of picture

The fixation of picture

Alkyl halides on treatment with Zn and HCI gives

Choose an answer

Alkanes

Alkenes

Alkynes

Alcohols

Teflon, styron and neoprene are all

Choose an answer

Copolymers

Condensation polymers

Homopolymers

Monomers

Choose an answer

Electrophilic substitution

Free radical reduction

Isomerisation

Nucleophilic substitution

Which is independent of temperature

Choose an answer

Molarity

Molality

Normality

Mole fraction

In the expression rate = K [A]^a[B]^bK is

Choose an answer

The order of reaction

The speed of reaction

The specific rate constant

The overall order of reaction

The tendency of atoms to attain a maximum of eight electrons in the valence shell is known as:

Choose an answer

Duplet rule.

Triad rule.

Octet rule.

Tetrade rule.

Which of the following geometry is associated with the compound in which the central atom assumes sp³d hybridization?

Choose an answer

Planar

Pyramidal

Angular

Trigonal bipyramidal

Lead accumulator contains

Choose an answer

30% NaCI solution as electrolyte

30% HCI solution as electrolyte

30% H₂SO₄solution as electrolyte

30% NaOH solution as electrolyte

The best electrode used in salt bridge is KCl. Which other electrolyte an also be used for the purpose :

Choose an answer

NaCl

NH₄NO₃

KNO₃

NaNO₃

More Classes

Other Links

Chemistry General Science Test Medium Mode 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

Choose an answer