Question # 1

The noble gas which was discovered first in the sun and then on the earth is.

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Helium

Neon

Argon

Xenon

Equilibrium constant Kp and Kc are related as

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Kc = Kp (RT)delta n

Kp = Kc (RT)an

Kp = (Kc/RT)delta n

Kp -Kc = (RT)delta n

Which librates H2 with NaOH

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B

AI

Zn

All

The group H steels can be used n what temperature range.

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600^oC to 1100 ^oC

1000 ^oC to 1500 ^oC

1100 ^oC to 2000 ^oC

200 ^oC to 800 ^oC

Natural fertilizers are materials derived from

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Plants

Animal

Algae

All of above

In a one -component system the maximum number of phase that can consist in equilibrium is.

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1

2

3

4

The 'shape' of molecule ." Xe F6 is.

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Pentagonal bipyramidal

Regular octahedral

Distorted octahedral

Square planar

Which is not an ore of aluminium.

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Baxuite

Cryolite

Monazite

Corundum

Which among the following elements has the highest value of IE.

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Mg

Na

Ca

Sr

Each of the following when present at para position decreases the acidic strength of phenol except.

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-NH2

-Cl

CH3O-

CH3-

Which of the following reactions is employed to produce ozone in the laboratory.

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Exposure of air to UV light

Reaction of F2 with H2O at low temperature

Reaction SO2 with H2O2

Passage of silent electric discharge through oxygen

Which of the following contains isoprene unite.

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Natural rubber

Nylong -6,6

Polyethylene

Decron

Metallic bond is treated essentially as in character

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Ionic

Covalent

Polar

Non polar

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

C is -2 butene on reaction with bromino give 2,3 -dibromobutane which is

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Recemic mixture

Meso isomer

Dextoroisomer

Levoisomer

A catalyst

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Actually participates in the reaction

Changes the equilibrium concentration of the products

Does not affect a reaction energy path

Always decreases the rate for a reaction

Acid rain effects

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Human being

Crops

Aquatic life

All above

An induction of dipole or polarity in non polar bond, and consequent electron shifting along a chain of atoms is known as.

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Inductive effect

Resonance effect

Hyper conjugation

None of the above

The Lewis formula of SOCl2, the total number of bond pairs and lone pairs of electron around sulphur are.

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2 ,1

2,2

3,1

3,0

In which of the following species the bonds are non directional.

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NCl3

RbCl

BeCl2

BCl3

The strongest acid is.

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HNO2

HNO3

H2N2O2

HNOS

Steel is an alloy of iron and carbon with limits on the amount of carbon to less than _______ percent.

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2

3

1

4

Suppose the activatin energy of a certain reaction is 250 kj/mol, If the rate constant at T1 =300 K is k1 and the rate constant at T2= 320 K is ks, then the reaction is ______ times faster at 320 K than at 300 K

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3 x 10^-29

0.067

525

15.0

Which of the following statements is not correct with respect to applications of Hammett equations.

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It develops a quantitative relationship between structure and reactivity

This equation on can be used to calculate the value of pK_a

This equation does not help to calculate the rate of some reactions

This equation has mechanistic implications

Which of the following is an acceptable value fo the molecularity.

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0

2

6

3/2

Select an acidic amino acid

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Lysine

Cystine

Aspartic acid

Aminoacetic acid

Which of the following statement in not correct with respect to inductive effect.

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Bond length decrease with increase in inductive effect.

Inductive effect generates polar character in bonds

Variation in strength of aliphatic acids can be explained

It alone cna explain the basically of triphenylamine

Egyptians were using ________ to prepare make up for eyes.

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Nanoaluminium

Nanocopper

Nanosteel

Nanolead

Which of the following salt is not used in salt bridge to minimize liquids junction potential.

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KCl

NH4Cl

KNO3

CaCl2

Zero group of the periodic table consists of.

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Four elements

Five elements

Six elements

Eight elements

The layer containing petroleum oil and gas is.

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Above that of water

Below water

Between water and sand

All of above

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