Question # 1

Which is a polar molecule?

Choose an answer

HCI

H₂

CI₂

O₂

The bond in covalent compound is ________________

Choose an answer

Covalent

Ionic

Dative

Couple

Addition of OXYGEN is called.

Choose an answer

Reduction

Conduction

Oxidation

Nil

Which of the following is less malleable?

Choose an answer

Sodium

Iron

Gold

Sliver

L shell can accommodate ________________ electrons.

Choose an answer

2

8

18

32

The symbol of sodium is :

Choose an answer

Sa

Na

Pa

Ca

The number of proton in an atom is called _________ number.

Choose an answer

Molecule

Formula

Atomic

Molar

The value of Avogadro 'no is:

Choose an answer

6.023×1024

6.023×1026

6.023×1023

6.023×1020

Which one is least oxidizing agent?

Choose an answer

F

CI

I

Br

All electrolytes are:

Choose an answer

Conductor

Insulator

Semi conductor

Nil

Salt & water is a _________ mixture.

Choose an answer

Homogeneous

Heterogeneous

It is not mixture

Nil

Brown hair contains.

Choose an answer

Iron compound

Copper compound

titanium compound

Both a and b

The most important oligosaccharide is:

Choose an answer

Sucrose

Glucose

Fractose

Maltose

Blast furnace usually used for the metallurgy of.

Choose an answer

Iron

Copper

Aluminum

Both a and b

The heat capacity of water is greater than rocks.

Choose an answer

4 times

5 times

6 times

7 times

The strong heating of coal in the absence of air is called.

Choose an answer

Carbonization

Destructive distillation

Fractional distillation

All

The strong heating of coal in the absence of air called.

Choose an answer

Fractional Distilation

Destructive Distiation

Carbonization

Catenation

Amino acid are linked to each other through.

Choose an answer

Hydrogen link

Ionic link

Gelatin link

Peptide link

The energy provided by carbohydrates in per gram.

Choose an answer

17 KJ

21 KJ

35 KJ

10 KJ

At equilibrium state, when reaction cases to proceed, it is called:

Choose an answer

equilibrium constant

dynamic equilibrium

static equilibrium

simple equilibrium

Traces of acetylene are present to coal gas about.

Choose an answer

0.06 %

0.08%

1.1 %

90%

____________ is synthetic fiber.

Choose an answer

Cotton

Woal

Nylon

Silk

When water freezes at 0 ^oC, its density decrease due to.

Choose an answer

Cubic structure of ice

Empty spaces present in the structure of ice

Change of bond lengths

Change of bond angles

The unit of rate constant depends upon

Choose an answer

Number of reactants

Concentration terms

Order of reaction

Molecularity of reaction

Quantum number values for 2p orbitals are.

Choose an answer

n = 2, 1 =1

n =1, 1 = 2

n =1, 1= 0

n = 2, 1 = 0

Which process is endothermic and spontaneous

Choose an answer

Neutralization of NaOH with HCl

Formation of NH3 from H2 and N2

Formation of H2O from H2 and O2

Evaporation of sea water

How many moles of CO are present having 12.04 x 10²³molecules of CO2.

Choose an answer

0.5 mol

1.0 mol

1,5 mol

2.0 mol

Which is not use of liquid crystals.

Choose an answer

Temperature sensor

Liquid crystal display

Skin thermography

Energy supply in electrical devices.

One mole of CH₃OH and one mole of C₂H₅OH have

Choose an answer

Equal number of atoms

Equal number of molecules

Equal number of electrons

Equal number of protons

Chromatography in which the stationary phase is a solid is classified as.

Choose an answer

Partition chromatography

Gas chromatography

Adsorption Chromatography

Thin layer chromatography

Calorie is equivalent to

Choose an answer

0.4184 J

41.84 J

4.184 J

418.4 J

An aqueous solution of ethanol is water has vaporu pressure.

Choose an answer

Equal to the of water

Equal to that of ethanol

More than that of H2O

Less than that of water

Which is not a molecular ion.

Choose an answer

He+

CH3+

NH3-

CO+

In Pakistan, the total consumption of paper per person per year is.

Choose an answer

2 kg

5 kg

7 kg

10 kg

The chief of aluminum is

Choose an answer

Na₃AlF₆

Al₂O₃.2H₂O

Al₂O₃

Al₂O₃.H₂O

The product of fermentation of sucrose is

Choose an answer

Ethanol and H2O

Ethanol and CO

Ethanol and CO2

Glucose and CO2

Which one of the following methods is used for the preparation of ether.

Choose an answer

Kolbe's reaction

Frankland reaction

Williamson synthesis

Down's process

The total number of translation elements is

Choose an answer

10

14

40

65

Which of the following sulphates is not soluble in water.

Choose an answer

Sodium sulphate

Potassium sulphate

Zinc sulphate

Barium Sulphate

When hydrolyzed, protein yields.

Choose an answer

Fatty acid

Glycerol

Amino acid

Nucleosides

Which one of the following species is meta director if present at benzene ring.

Choose an answer

-NO2

-Cl

-CH3

-OH

Aldehydes and ketones can be defected by

Choose an answer

2, 4 DNPH test

Tollen's test

Sodium Nitro prusside test

Benedicts solution test

Setting process of cement is based upon

Choose an answer

Hydrolysis

Hydration

Dehydration

Botha a and b

Which one of the following reactants will be required to form ethyl alcohol form ethyl bromide.

Choose an answer

Alcoholic KOH

Aqueous KOH

Alkaline KMnO4

Sodium metal in ether