Question # 1

Quantum means.

Choose an answer

Virable energy

Fixed energy

High energy

Minimum energy

An element has 5 electrons in M shell. Its tomic number is.

Choose an answer

5

10

15

20

All the noble gases have their valence electrons.

Choose an answer

Incomplete

Partialy filled

Completely filled

None of the above

A bond formed between two non metals is expected to be

Choose an answer

Ionic

Coordinate covalent

Metallic

Covalent

How many electron are there in the valence shell of sodium atom.

Choose an answer

One

Two

Three

Four

No reaction occurs if the energy of reacting particles.......activation energy.

Choose an answer

Lower than

Greather than

Nearest to

Equal to

The fore of attraction betwene water molecule is.

Choose an answer

Ionic bonding

Covalent bonding

Hydrgen Bonding

Co ordinate Covalent bonding

According to Arrhenius concept acid is a substance which dissociates in aqueious solutin to give.

Choose an answer

Proton

Pair of Electron

Hydrogen Ions

Hydroxide ion

Metals are teh elements which have.

Choose an answer

Electronegative character

Electropositive character

Both a and b

None of the above

The structure of C atom in diamond is.

Choose an answer

Pentagonal

Triangle

Hexahedral

Tetrahedral

17th group elements ae known as

Choose an answer

Alkaki metals

Alkaline earth metals

Noble gases

Halogens

Hypoglycemia result due to:

Choose an answer

high cholesterol level

low cholesterol level

low sugar level in body

high sugar level in body

Vital force theory was rejected by.

Choose an answer

Jabir Bin Hayan

Drawin

Wohler

Berzellius

Which type of reactions take place in both directions?

Choose an answer

Addition reactions

Reversible reactions

Irreversibel reactions

Decomposition reactions

Which is simplest alkane?

Choose an answer

CH₄

C₂H₈

C₂H₂

C₂H₄

Which one of the following is not a fraction of petroleum?

Choose an answer

Kerosene oil

Diesel oil

Alcohol

Petrol

Glucose and fructose are;

Choose an answer

trioses

tetroses

pentoses

hexoses

Which one of the following is polmerized to from benzene?

Choose an answer

ethane

ethene

methane

ethyne

Which disease is caused by polluted water.

Choose an answer

Cholera

Typhoid

Diarrhea

All of them

Which one is the simplest sugar which can not be hydrolyzed?

Choose an answer

Glucose

Sucrose

Starch

Cellulose

How many atmospheric temperature increase every year due to accumulation of CO₂ in air.

Choose an answer

0.03 ^oC

0.05 ^oC

1^oC

2^oC

The formula of ozone is.

Choose an answer

O₂

O₃

O

CO

What is oxidation state of chlorine in Ca(ClO3)2

Choose an answer

+1

+3

+5

+7

Many element have fractional atomic masses. This is because.

Choose an answer

the mass of the atom is itself fractional

Atomic masses are average mases of Isobars

Atomic masses are average masses Isotopes

Atomic masses are average masses of Isotopes proportional to their relative abundance.

The paramagnetic behaviour of oxygen is well explaned on the basis of.

Choose an answer

M.O Theory

N.B Theory

VSEPR Theory

CF theory

SP^3-hybridization in important in describing the bonding in

Choose an answer

When i₂present in the aquous layer in the form of I^-1₃foes to CCI₄layer, then the change in colour is from

Choose an answer

Purple to brown

Purple to green

Green to brown

Brown to purple

Which of the following molecules has a co-ordinate covalent bond

Choose an answer

NH₄CI

NaCI

HCI

AICI₃

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

Which pair of mixture is called ideal solution.

Choose an answer

Chlorobenzene and bromobenzene

Water alcohol

Water ether

HCl and water

The order of the rate of diffusion of gases NH3, SO3, Cl2 and CO2 is.

Choose an answer

NH3>SO2>CL2>CO2

NH3>CO2>SI2>Cl2

Cl2>SO2>CO2>NH3

Which electron traveled more distance, when jump from

Choose an answer

n1 to n2

n2 ato n3

n3 to n2

n3 to n4

The true representation for the units of rate constant K for the first order reaction

Choose an answer

sec^-1

mole dm^-3s

mole dm^-3s^-1

mole^-1dm⁺³s^-1

The carbon atom of carbonyl group is hybridized

Choose an answer

Sp

Sp²

Sp³

dsp²

Which products is not formed when ethyl alcohol reacts with SOCl2 in the presence of pyridine.

Choose an answer

Ethyl chloride

Hydrogen chloride

Sulphur di oxide

Sulphur tri oxide

Which property of triglycerides is used to determine its molecular mass.

Choose an answer

acid number

Saponification number

Iodine number

gold number

m-choronitro benzene is prepared by

Choose an answer

Nitration of chlorobenzene

Nitration of Benzene

Chlorination of Nitrobenzene

Nitration of m-chlorobenzene

-------------------- is Alcohol in the following

Choose an answer

CH₃.CH₂.OH

CH₃.O.CH₃

CH₃COOH

CH₃.CH₂.SH

Which oxide is amphoteric in nature.

Choose an answer

BeO

MgO

CaO

BaO

Acetone reacts with HCN to form a cyanohydrin. It is an example of.

Choose an answer

Electrophilic addition

Electrophilic substitution

Nucleophilic addition

Nucleophilic substitution

Which one of the following gases is used welding purpose usualy.

Choose an answer

Methane

Ethane

Ethene

Acetylene

Acetamide is prepared by

Choose an answer

Heating ammonium acetate

Heating methyl cyanide

Heating ethyl acetate

The hydrolysis of methyl cyanide

Which is more basic

Choose an answer

RbOH

NaOH

KOH

Li OH

The conversation of n-hexane into benzene by heating in in the presence of Pt is called

Choose an answer

Isomerization

Aromatization

Dealkylation

Rearrangement