Question # 1

Water dissolves ____________ compound.

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Ionic

Polar covalent

A & B

Nil

Which one of the following will show negligible effect of temperature on its solubility?

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KCI

KNO³

NaNO³

NaCI

N consist of ________________ sub shells.

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4

1

2

0

The lowest energy level is

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K

L

M

N

The earth is made up of ____________ % of aluminum.

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6

7

8

9

When an electronegative element combines electropositive element the type of bonding is

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covalent

ionic

polar covalent

coordinate covalent

The branch of chemistry which deals with qualitative & quantitative analysis of matter is :

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Analytical

Nuclear

Biochemistry

Organic

Hydrogen is a ____________

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Metal

Non metal

Metalloids

Nil

An ion is a charged particles:

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True

False

In some conditions

Never

An atom having six electrons in its achieve noble electronic configuration by:

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gaining one electron

losing all electrons

gaining two electrons

losing two electrons

1 atm = ?

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1 pascal

760 mm of Hg

1 atm

1 Nm^-2

Silicon occurs in the form of

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Silica

Silicates

both a and b

None of these

A bound formed between two amino acids is:

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Peptide linkage

Covalent bound

Hydrogen bound

Glycosidic linkage

How many percentage of sunlight is absorbed by atmosphere gases.

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12%

18%

24%

30%

Which one of the following are amorphous solids?

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Monosacchrides

Oligosaccharides

Polysaccharides

All of them

Red hair contains compound of.

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Iron

copper

titanium

Molybdenum

Guldberg and waage put forward law of mass action in:

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1860

1869

1870

1879

the chemical formula of chalcopyrite is:

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Cu₂S

CuFe₂S

CuS

FeS

Dehalogenation of tetrahalides produces acetylene. This reaction takes place in the presence of

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Sodium metal

Zinc metal

Magnesium metal

Potassium metal

_________ acid is used in lead storage batteries as electrolyte.

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CH₃COOH

HCl

HNO₃

H₂SO₄

Which one of the followoing is the Hardest coal.

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Peat

Lignite

Bituminous

Anthracite

Vital force theory was rejected by.

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Jabir Bin Hayan

Drawin

Wohler

Berzellius

Which of the following molecules has zero dipole moment

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NH₃

CHCI₃

H₂O

BF₃

Safe and reliable method of drying crystals is through.

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Pressing it between folds of filter paper

Drying it in oven

Evaporation of solution

Vacuum desiccator

Which is not use of liquid crystals.

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Temperature sensor

Liquid crystal display

Skin thermography

Energy supply in electrical devices.

In a solution 7.8 g of benzene and 46 g of toluene is present The mole fraction of benzene is.

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1/2

1/3

1/5

1/6

_________ was derived by C.M Guldberg and P Waage in 1864

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Law of conservation of Mass

Law of mass action

Law of conservation of energy

Distribution law

In lead accumulator cathode is made up of.

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Pb

Pb coated with PbO2

PbSO4

Mixture of Pb and PbO2

Dipole moment is defined as.

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Charge x distance

Charge x Debye

Charge x displacement

Charge x bond energy

NaCI is face centered cubic structure. The Na ion at the face of the unit cell is shared by

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2-unit cells

4-unit cells

Only one unit cell

8-unit cells

The quantitative relationship between rate and concentration is given by.

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Law of mass action

Rate law

Both of these

Le Chatelier's principle

Cathode rays strike alumina and produce a ..........colour.

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Red

Blue

Yellow

Green

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

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0.5 mol

1.0 mol

1,5 mol

2.0 mol

Which substance is water repellant and used in ceramic insulators.

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Asbestos

Lead compounds

Silicon carbide

silicones

Which of the following derivative cannot be prepared directly from acetic acid

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Acetamide

Acetyl choride

Acetic anhydride

Ethyl acetate

Formula of chloroform is

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CH₃Cl

CCl₄

CH₂Cl₂

CHCl₃

The region of earth capable of supposing life is called.

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Atmosphere

Bisphere

Dithosphere

Hydrosphere

Which of the following is a typical transition metal.

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Sc

Y

Ra

CO

Which of the following acids possess oxidizing and reducing properties.

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HCl

HNO2

HNO3

H2SO4

The most metallic elements from the following is

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Arsenic

Oxygen

Antimony

Bismuth

Which isomerism is not found in alkenes.

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Chain isomerism

Positional isomerism

Geometrical isomerism

Metamerism

Which form of phosphorus is more stable.

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White

Red

Black

Both a and b

Chile saltpeter has the chemical formal

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NaNO₃

KNO₂

Na₂B₄O₇

Na₂CO₃.H₂O

Which compound shows hydrogen bonding.

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C2H6

C2H5Cl

CH3-O-CH3

C2H5OH