Question # 1

Which molecule contains a single vovalent bond.

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CH4

C2H4

C2H2

O2

How many moels of molecules are there in 16 g oxygen.

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0.05

0.1

0.5

1

Why the gas starts coming out when you open a can of fizzy drink.

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Because gteh solubiliyt of the gas increases

Because the gas is dissolved under pressure hence it comes out when pressur eis decreased

Becaue the gas is insoluble in water

Because the solubility of hte gas decreases at high pressure.

To Identify the concentration of a particular solution through titration is and application of.

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astrochemistry

analytical chemistry

geochemistry

Organic chemistry

The unit of ionization energy is

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nm and pm

kJ mol-1

Pascal

Newton

Silicon belongs to Grou IVA . It has ....electons in the valence shell

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2

6

3

4

Which one of the following halongesn has lowest electronetivity

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Iodine

Chlorine

Fluorine

Bromine

Transfer of electron between elements result in.

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Coordinate covalent bonding

Ionic bonding

Metallic bonding

Covallent bonding

How many covalent bonds does C₂H₂ molecule have.

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Two

Three

Four

Five

How many blocks are presnt in modern periodic table

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2

3

4

5

--------------- acts a catalyst promoting the breakdown of ozone.

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I2

Br2

Cl2

None

The source of galactose.

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Fruits

Vegetables

Cereals

All of them

Ethylene is present is natural gas sometimes to the extent of .

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10%

20%

30%

40%

The number of carbon atoms present in petroleum gas.

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1-2

1-3

1-4

1-5

Formic acid is present in

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String of bees

Sour milk

Apple

Fats

Which gas is not present in atmosphere?

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Nitrogen

Oxygen

Helium

Carbon dioxide

Alkanes give reaction only

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Addition

Decomposition

Substitution

Displacement

Which gas is produce by the electrical lightening of air.

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NO

SO₂

SO₃

CO₂

The product of any Lewis acid-base reaction is a single specie called:

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free radical

adduct

molecular ion

conjugate

Imperial chemical industries was established in.

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1942

1944

1950

1990

Which of the followings is a disaccharide?

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Glucose

Fructose

Sucrose

Starch

Composition of carbon in kerosene oil is.

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C₁₀-C₁₂

C₁₂-C₁₂

C₁₆-C₁₈

C₃₀-C₃₀

The nature of copper crystals is

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Metallic

Ionic

Covalent

Molecular

NaCI and sand can be separated by one of the following without filtration

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Formation of solution and filtration

Formation of solution and evaporation without filtration

Sublimation

Chromatiograghy

CO+ is an example of.

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Free radical

Cationic molecular ion

Anionic molecular ion

Stable molecule

Gas equation is derived by combining

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Avogadro's and Charles's Law

Boyle's and Charles's Law

Avogadro's and Boyle's Law

Avogadro's, Boyle's and Charles's Law

An Ideal gas can not be liquefied because.

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Its critical temperature is always above 0 ^oC

It molecules are relatively smaller in size

Its solidify before becoming a liquid

Force operative between its molecules are negligible

How many moles of water results by burning 4 mole of H2 with excess of oxygen.

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1 mol

2 mol

3 mol

4 mol

An atomic orbital has l =1 , m =+1, 0, -1, n = 3 than which one of the following atomic orbital has such values.

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2s

2p

3p

3d

Amorphous solids.

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Have sharp melting points.

Undergo clean cleavage when cut with knife

Have perfect arrangement of atoms

Can possesses small regions of orderly arrangement of atoms.

The cell in which a non spontaneous redox reaction takes place as a result of electricity is known as.

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Voltaic cell

Denial cell

dry Cell

Electrolytic cell

If temperature of one mole of ideal gas at 273 K and one atmospheric pressure is increased by 1 K, amount of energy absorbed is.

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0.082 dm3 atm

1.987 cal.

8.313 J

All are correct.

Which pair of molecule have Debye forces in them

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Ar and Ar

Argon and water

Na+ ions and water

water and water

Plastics are a pollution problem because many plastics

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Are made from petroleum

Are very inflammable

Burn to produce toxic fumes

Decompose to produce toxic products

Which one of the following gases is used for artificial ripening of fruits

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Ethene

Ethyne

Methane

Propane

Which is a secondary pollutant

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Carbonic acid

CO₂

SO₂

CO

The state of hybridization in ethene molecule is

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dsp²

sp³

sp²

sp

Geometrical isomerism in alkene is due to.

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C = C free rotation of bond

No C = C free rotation of bond

Presence of multiple bond only

Opticla rotation due to multiple bond

Acetylene polymerized in the presence of ammonium chloride and cuprous chloride ot form.

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Benzene

PVC

Di vieiyl acetylene

Polyethene

Which of the following elements is not present abundantly in earth's crust

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Silicon

Aluminium

Sodium

Oxygen

Bleaching powder contains available chlorine approximately

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100%

70-80%

35-40%

10-20%

SN2 reactions can be best carried out with

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Primary alkyl halides

Secondary alkyl halides

Tertiary alkyl halides

All the three

Ethyne on oxidation with strong alkaline KMnO4 changes to

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Ethyl alcohol

Acetaldehyde

Vinyl alcohol

Glyoxal

Structure of benzene is

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Tetrahedral

Trigonal planar

Hexagonal planar

Linear