Question # 1

Bond dissociation for O2 is

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505 kJ/mol

705 kJ/mol

605 kJ/mol

498 kJ/mol

The formaton ionic bond between two ions is due to.

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Hydrogen bonding

Metalic force

Electrostatic forces

All of the above

A good example of homogeneious mixture is.

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Soil

Ice-Creem

Rock

Wood

Number of electrons that an be accomodated in f - subshell

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6

10

2

14

Which state of matter has fixed shape and volume?

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Liquid

Solid

Gas

All of these

If reversibe reaction useful for preparing compounds on large scale.

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Yes

No

They are useful only when equilirbium lies far to the left side

They are useful only when equilibrium lies far to the right side

Which of the following grops contain alkaline earth metals.

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I A

II A

VII A

VIII A

What will hapen to the concentrations of the prodcut if a reversible reaction at eqiulibrium is not distrubed.

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They will keepon increasing

They will keep on decreasing

They will remain constant

They willremain constant for some time and then start decreasing

Hydrogen bound ing is always found in

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Non-polar molecules

Homoatomic molecules

Polar Molecules

All of the above

Which of the following is a heterogeneous mixture

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Concrete mixture

a solution of potassium nitrate in water

a solution of calcium hydroxide in water

Hot chocolate

When one mole of each of the following compounds is reacted with oxygen, which wil produce the maximum amount CO2?

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Carbon

Ethane

Diamond

Methane

Which one Ion is not present in salt.

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Metallic cation

Anion of Base

Anion of acid

None metallic anion

Acid rain affects the aquatic life by clogging fish gills because of:

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Lead metal

Chromium metal

Mercury metal

Aluminium metal

Which one of the following is not the characteristics of monosaccharide?

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White crystalline solids

Soluble in water

Hydrolysable

Reducing is nature

Swimming pools are cleaned by the process.

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Chlorination

Hydrogenations

Saponification

None of them

How many percentage of sunlight is absorbed by atmosphere gases.

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12%

18%

24%

30%

Water of crystallization is responsible for.

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Melting points of crystals2

Boiling point of crystal

Shape of crystal

Transition points of crystals

High concentration of which metal clogs the fish gills.

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Zinc

Aluminium

Sodium

Copper

When bones are heated they give.

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Starch

Gelatin

Fats

Oils

Metallurgy involves which of the following steps?

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Mining and enrichment

Reduction

Refining and casting.

All of these

Amont the followign substitution reaction is characteristics of.

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Alkanes

Alkenes

Alkynes

None of these

Crude oil is heated to the fractionating furnace upto.

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300 ^oC

350^oC

400^oC

450^oC

The unit of the rate constant is the same as that of the rate of reaction in

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First order reaction

Second order reaction

Zero order reaction

Third order reaction

The mass of alpha particle is equal to.

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Four times the mass of one proton

That of one hydrogen atom

That of one electron

That of one proton

Some impurities of MgCl2 are present in NaCl which separation technique can be used to separate the impurities.

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Filtration

Crystallization

Common ion effect

Chromatography

In which molecule all atoms are coplanar.

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CH4

BF3

NH3

PH3

The molal boiling point constant is the the ratio of the elevation in boiling point to.

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Molarity

Molality

Mole fraction of solvent

Mole fraction of solute

The spreading of fragrance of a rose or scent in air is due to.

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Effusion

Diffusion

Osmosis

Evaporation

The deviation of a gas from ideal behavior is maximum at.

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-10 ^oC and 5.0 atm

-10^oC and 2 atm

0^oC and 2 atm

100^oC and 2 atm

At which distance a molecule is present from its neighbor molecules of its own diameter, at room temperature.

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100 times

200 times

300 times

400 times

pH of buffer is calculated by.

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Sorenson equation

Mosley equation

Henderson equation

De broglie equation

Which of the following molecules contain six bonding electrons.

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CH4

CO2

BF3

H2S

The boiling point of water at Murree Hills.

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90^oC

98^oC

100^oC

120^oC

Aluminium oxide is

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Acidic oxide

Baric oxide

Amphoteric oxide

None of these

Phenol is the derivative of

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Alkane

Aromatic hydrocarbon

Aliphatic hydrocarbon

Alkene

Which one of the following compounds show geometrical isomerism in it.

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1- pentene

1,1 dichloro ethane

all of these

2- Pentene

The avoid teh formation of toxic compounds with chlorine which substance is used for disinfecting water.

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KMnO4

O3

Alum

Chloramines

The reaction of alkyl halides with sodium metal in the presence of ether to from alkane is known as.

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Wortz reaction

Frankland reaction

Sabatier sendron

Kolbe's synthesis

Which is simplest amino acid

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Alanine

Protein

Lysine

Glycine

Which one of the following elements burns in air to form an oxide which, when shaken with water, give sa solution with a pH greater than 7.

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Carbon

Magnesium

sulphur

Hydrogen

Malonic acid is

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Aromatic monocarboxylic acid

Aromatic dicarboxylic acid

Aliphatic monocarboxylic acid

Aliphatic di carboxylic acid

Which compound form benzoic acid on oxidation with strong oxidizing agent.

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Toluene

Ethyl benzene

n propyl benzene

All

Paraldehyde is polymer of.

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HCHO

CH3CHO

CH3COCH3

CH3CH2-CH2OH

Micro nutrients are required in quantity ranging from

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4 g - 40 g

6 g -200 g

6kg - 200 kg

4 kg - 40 kg