Question # 1

O3, Ozone is _________ molecules.

Choose an answer

Homoatomic

Hetroatomic

Monoatomic

Nil

PCL5 is ________________ shaped.

Choose an answer

Bipyromidal

Angular

Triangular

Linear

The no.of elements in the first period is

Choose an answer

2

8

18

23

The mixture of two component is called .

Choose an answer

Homogeneous mixture

Binary solution

Both a & b

Nil

The mathematical formula of Charle's law is:

Choose an answer

PV = k

V/T = k

P = VT

T/V = k

Mass per unit volume is:

Choose an answer

Velocity

Dencity

Pressure

Nil

All metals are solid at ________________ temperature.

Choose an answer

Room

High

Low

None

The solution in which one component is aqueous ____________ solution.

Choose an answer

Aqueous

Binary

All

None

All chemists invented all except:

Choose an answer

Beakers

Spirit lamp

Funnels

Retorts

Transfer of electrons between atoms results in:

Choose an answer

metallic bonding

ionic bonding

covalent bonding

coordinate covalent bonding

Which one of the following solution contains more water?

Choose an answer

2M

IM

0.5M

0.25M

A bound formed between two amino acids is:

Choose an answer

Peptide linkage

Covalent bound

Hydrogen bound

Glycosidic linkage

Atmosphere has regions.

Choose an answer

One

Two

Three

Four

Petroleum fraction having composition C₅ to C₇ is.

Choose an answer

Petroleum Gas

Petroleum Ether

Kerosine oil

Gasoline or petrol

Percentage of nitrogen in atmosphere is:

Choose an answer

20.94%

78.09%

0.93%

0.03%

Arrhenius put forward acid base concept in.

Choose an answer

1878

1786

1787

1790

The 1st organic compound prepared in laboratory.

Choose an answer

Urea

NaCl

Thiourea

Pyridine

Glucose is:

Choose an answer

Hexabydroxy aldehyde

Hexahydroxy ketone

Polyhydroxy aldehyde

Pentahydroxy ketone.

A conjugate acid is a specie formed by accepting a.

Choose an answer

Proton

Electron pair

Neutron

Electron

Which one of the following is not faction of crude oil.

Choose an answer

Paraffin wax

Asphalt

Fuel oil

Petroleum coke

About 99% of atmospheric mass lies in.

Choose an answer

35 km

30 km

15 km

16 km

The number of carbon atoms present in kerosene oil.

Choose an answer

8-12

9-12

10-12

11-12

Isomorphic crystals show

Choose an answer

Same chemical properties

Same physical properties

Same crystalline form

Same melting point

A solution has pH zero. Its H+ ions concertation will

Choose an answer

zero

More than unity

Less than unity

Unity only

When water freezes, its volume increase.

Choose an answer

12%

9%

15%

18%

Gases of air, always remains in the random motion and do not settle due to.

Choose an answer

Elastic collision of gas molecules

Unequal number of different gas molecules

Difference impartial pressure of gas molecules

Difference in molecular masses of air gases

The voltage Nickel Cadmium cell is

Choose an answer

1 V

1.2 V

1.4 V

1.6 V

In silver oxide battery, anode is made of.

Choose an answer

Zinc

Copper

Lead

Graphite

If absolute temperature of the gas is doubled and the pressure is reduced to one half the volume the gas will.

Choose an answer

Remains uncharged

Increase four time

Reduce to 1/4

Be doubled

Bond energy depends upon

Choose an answer

Electronegativity

Size of atom

Bond length

All of these

When small amount of acid or base is added to buffer, its pH.

Choose an answer

Remain same

Always increases

Always decreases

slightly increases or decreases

The shape of diamond crystal is.

Choose an answer

cubic

Hexagonal

Tetragonal

Orthorhombic

Rutherford's model of atom failed because.

Choose an answer

The atom did not have a nucleus and electron

It did not account for the attraction between protons and neutrons.

It did not account for stability of the atom

There is actually no space between the nucleus and the electrons.

Formic acid is present in.

Choose an answer

Butter

Vinegar

Ant

Sunflower

Group VI B to transition elements contains

Choose an answer

Zn, Cd, Hg

Fe, Ru, OS

Cr, MO, W

Mn, Te, Re

Aluminium is used for making petrol and milk storage tanks because it is

Choose an answer

Conductor

Non magnetic

Excellent reflected

Corrosion resistant

The enzyme which bring about exchange of functional group between two compounds is called.

Choose an answer

Hydrolases

Transferase

Lyases

Ligases

Which one of the following is not amino acid.

Choose an answer

Alanine

Glycine

Aspartic acid

Aniline

Which substance is used to lower the melting point of NaCl in Down's cell

Choose an answer

CaCO3

CaCl2

MgSO4

AlCl3

The crystals of caustic soda, NaOH, are hygroscopic when these crystals are exposed to air.

Choose an answer

Gain water and remains solid

Gain water and becomes liquid

Lose mass and remain solid

Remain unchanged on heating.

The strength of binding energy of transition elements depend upon

Choose an answer

number of electron pairs

number of unpaired electron pairs

number of neutrons

number of protons

Which substance usually undergo nucleophilic addition reactions.

Choose an answer

Benzenes

Aldehydes

Alkenes

All of these

The aromatic ring of Benzene can be hydrogenated in the presenc eof.

Choose an answer

Pt

Rh

Sunlight

O3

Which one of the following is inorganic fertilizer.

Choose an answer

Manure

Urea

Ammonium nitrate

All of these