Question # 1

During the formation of ionic bond heat is.

Choose an answer

Remains same

Absorbed

Released

Both a and b

Which type of reactions speed up gradully?

Choose an answer

Decomposition reaction

Forward reaction

Reverse reactions

Irreversibel reactions

Which Isotopes is commonly used to irradiate cancer cells.

Choose an answer

Cobalt -60

Iodine-23

Carbon -14

Iodine-131

Whcih one of the following is the weakest force among the atoms.

Choose an answer

Intermolecular force

Ionic force

Metallic force

Covelent forces

Which compound formed when SO2 is dissolved in water

Choose an answer

H2SO3

SO3

H2SO

H2S2O7

Bond dissociation for O2 is

Choose an answer

505 kJ/mol

705 kJ/mol

605 kJ/mol

498 kJ/mol

In chemical reaction, the substances that combine are called.

Choose an answer

Masses

Materials

Products

Reactants

Numbr of hydrogen atoms present in 18 g of water.

Choose an answer

2 x NA

N_A

3 x N_A

1/2 N_A

Number of peiod in the periodic table are.

Choose an answer

7

8

5

16

When a reaction will be come a reversible one?

Choose an answer

If the actvation eneryg of the forward reaction is comparrble to that of backward reaction

If the activation energy of the forward reaction is higher than that of backward reaction

If the activationenergy of the forward reaction is lower than that of backward reaction

If the enthalpy change of both the reactions is zero.

How is radio carbon dating useful for archeolgists.

Choose an answer

It helps detemine whether the matter is radioactie or not

It helps determine the age of organic matter

It helps determine the composition of matter

It helps deterime the usefulness of matter

High concentration of which metal clogs the fish gills.

Choose an answer

Zinc

Aluminium

Sodium

Copper

Froth flotation process is used to concentrate.

Choose an answer

Copper ore

Iron ore

Chromium ore

Aluminum ore

Latin word 'Acidus' means:

Choose an answer

sweet

salty

sour

bitter

A product of any Lewis acid base reaction is a single specie called.

Choose an answer

Salt

Water

Adduct

None of these

Which one of the following salts makes the water permanently hard?

Choose an answer

NaCO₃

NaHCO₃

CA(HCO₃)₂

CaSO₄

The carbon contents in lignite is.

Choose an answer

80%

50%

60%

70%

Catalytic converters convert.

Choose an answer

CO to CO₂

N₂ to NO

CO₂ to CO

N₂to NO₂

Chalco-pyite is an ore of:

Choose an answer

iron

aluminium

silver

copper

How many percentage blister copper is pure?

Choose an answer

95%

75%

98%

100%

The coal in which the percentage of carbon is 60%

Choose an answer

Peat

Lignite

Bituminous

Anthracit

Monosaccharide consists of number of carbon atoms.

Choose an answer

2 to 4

4 to 8

3 to 9

5 to 10

Molecular crystals are generally

Choose an answer

Hard

Relatively soft

Unstable

do not exist

Chromatography is the process which involve the distribution of a solute between

Choose an answer

Two mobile phases

A stationary phase and mobile phase

Two stationary and two mobile phases

Two stationary phases

The Rutherford experiment of using a stream of alpha particles on a piece of gold foil proved that.

Choose an answer

The atom was a solid sphere

The atom had electron

The atom had neutrons

The atom had a great empty space in it

n+1 value of 6d orbital is.

Choose an answer

08

09

10

18

The number of moles of CO₂which contain 8.0 g of oxygen

Choose an answer

0.25

0.50

1.0

1.50

The rate of diffusion of a gas is

Choose an answer

Directly proportional to its density

Directly proportional to molecular mass

Inversely proportional to its density

Inversely proportional to square root of its molecular mass

The molal boiling point constant is the ration of the elevation in boiling point to

Choose an answer

Molarity

Molality

Mole fraction of solvent

Mole fraction of solute

Dipole-dipole forces are present among.

Choose an answer

Molecules of Iodine

Atoms of Neon i gaseous state

Chloroforms' molecules

CCl4 molecules

Azeotrpic mixture of two liquids boils at a lower temperature than either of them, when

Choose an answer

It is saturated

Is shows positive deviation from Raoult's law

It shows negative deviation from Raoult's law

Is is metastable

Which is not used as drying agent in a desiccator.

Choose an answer

Cacl2

NaCl

P2O5

Salica Gel

Choose an answer

1

2

3

None of these

What type of reaction occurs between ethene and hydrogen.

Choose an answer

Addition

Substitution

Oxidation

Dehydration

Which one is not an argillaceous material.

Choose an answer

Clay

Shale

State

Gypsum

Which one of the following is calcareous material

Choose an answer

Marine shells

clay

Shale

Blast furnace slag

Acetic acid can be obtained from CH3MgI by treatment with.

Choose an answer

H2O

CINH2

CO2

HCHO

Synthetic rubber is made by polymerization of.

Choose an answer

Chloroform

Acetylene

Divinylactylene

Chloroprene

Cholesterol is an important precursor in the biosynthesis of

Choose an answer

Sex harmonies

Adrenal hormones

Vitamin D

All of these

Which of the following gives acidic oxide

Choose an answer

N

As

Sb

Bi

Basicity of ortho phosphoric acid is.

Choose an answer

1

2

3

4

Which class of elements shows law value of first ionization potential.

Choose an answer

Alkali metals

Alkaline earth metals

Halogens

Noble gases

Chlorine heptoxide (CI₂O₇) reacts with water to form

Choose an answer

Hypochlorous acid

Chloric acid

Perchloric acid

Chlorine and oxygen

Which one of the following proteins transports oxygen in blood stream.

Choose an answer

Insulin

Albumin

Hemoglobin

Globulin