Question # 1

Which of the following is not a correct postulate of the kinetic theory of gases.

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The molecules are in random motion

The gaseous collisions are perfectly elastic

The average kinetic energies of different gases are equal at a particular temperature.

The pressure exerted on the walls of the container is due to inter molecular forces.

The formula of Bauxite is.

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Al2O3

Al2 O3. 2H2O

AL2O3, H2O

Na3AIF6

The chrome vanadium steels contain how many percent of vanadium.

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0.15 to 0.30

0.05 to 0.15

0.30 to 0.45

0.45 to 0.60

Pick out the incorrect statement regarding ozone.

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O3 is an unstbale dark blue diamagnetic gas

The central oxygen in O3 is sp3 hybridized

It cause the tailing of mercury

It does not react with KOH

Which of the following group will have hyper conjugation effect when attached to benzene.

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------ CH3

----C6H5

------C(CH3)3

---------CH(CH3)2

AI Cl3 acts as a strong Lewis acid, because it is.

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A covalent compound

Readily hydrolyzed

Electron deficient

An ionic compound

The composition of mixture of clay and lime stone in the raw for cement material is.

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75% lime stone and 25% clay

25% lime stone and 75% clay

15% lime stone and 55% clay

30% limes stone and 79% clay

Which one of the following has a linear structure.

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H2O

CO2

NO2

SO2

For a given mass of a gas if temperature increase

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Pressure and volume remain Constance

Volume increases provided pressure is kept constant

Pressure decreases provided volume is constant

Both volume and pressure decrease

Aviation Fuel contains.

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Light Naphtha

Medium Naphtha

Kerosene

Diesel

Which of the following statement is not true with respect to hydrocarbons.

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They are gaseous and liquids

They can be saturated or unsaturated

They in air by themselves alone cause harmful effects

They form photochemical oxidants

Which of the following liquids has lowest vapour pressure at 25 ^oC

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Benzene

Chloroform

Ether

H2O

Isotopes are atoms whom nuclei have the same atomic number but different mass numbers. A specific isotope has an atomic number of 18 and a mass number of 35. How many electrons are there in the neutral atom.

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17

18

34

35

What is prefix in steel identification means it is made in an electric furnaced.

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E

H

B

Z

A mixture of ethyl iodide and n-propyl iodide is subjected to Wurts reaction. The hydrocarbon that will nto be formed is

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n-butane

n-propane

n-pentane

n-hexane

The lightest alkali metal is.

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Lithium

Sodium

Rubidium

Caesium

Which among the following is least soluble in water.

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NaF

LiF

KF

CsF

In the long form of periodic table, elements are arranged according to.

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Increasing atomic number

Decreasing atomic number

Increasing atomic mass

Decreasing atomic mass

Enzymatic action is heat at a fixed

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Temparature

pH

Both of these

None of these

Indicate the false statement about corrosion.

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Plastics and ceramics are immune to many forms of corrosion because they are not good conduction of electricity.

The corroded member in a corrosion cell is the cathode

Passivity is a prerequisite for the corrosion protect on many metals

None of these

Which of the following substance has been advocated as fuel of future.

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O2

N2

H2

H2O

CFT was originally applied to.

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Ionic crystal

Liquid crystal

Solid crystal

All above

The different layers in graphite are held together by

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Ionic bonding

Metallic bonding

Covalent bonding

Van der Waals forces

Which of the following is not chemical characteristics of water.

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pH

COD

BOD

Colour

_______ is heat treatment cycle that prevents glass from harmful stress.

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Forming

Annealing

Batching

None of these

What is a measure of rigidity?

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Stiffiness

Jardmess

Strength

Modulus of elasticity

The efficiency of a reversible heat engine depends only on the

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Temperature of the heat sink

Temperature of the heat source

Temperature of the heat source and sink

Pressure of the fluid

The reason why phenylamine is a much weaker base tahn ammonia when each is in aqueous solution to that.

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Teh ion pair of electron on two nitrogen atom of phenylamine is delocalised over the benzene ring.

The phenylamine molecule is too large to capture hydrogen ion easily

Phenylamine is much less soluble is water than is ammonia

The benzene ring has a tendency to increase the acidity of its substituents.

Which of the following products is obtained when but 2-ene is treated with perchloric acid.

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CH3CHO only

CH3COOH only

CH3CHO and CH3COOH

CH3CH2COOH + HCOOH

Alums are generally used

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In Dying and water proofing of fabric

In arrest bleeding

IN water purification

All above

Which of the following is a planar molecule.

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Acetone

Formic acid

Acetic acid

All above

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