Question # 1

PCl5 is an example of hybridization

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d sp³

d2 sp2

sp2

sp3

Organic substance responsible for the smell of flowers etc. are grouped together in chemistry as.

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Perfumes

Terpenoids

Flavonoids

Alkaloids

The temperate of a gas below which only the gas cools when allowed to expand is know as.

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Inversion temperature

Ideal temperature

Critical temperature

Joule Thomaon temperatu4re

The greater stability of bonzyl carbonium ion as compared to t-butyl carbonium ion is due to.

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Inductive effect

Resonance effect

Electrometric effect

All above

How much amount of NaOH is required to prepare 100 mL of 1 N solution.

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80 g

4 g

40 g

zero

The electronegativity of the following elements increases in the order.

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C,N, Si, P

N, Si, C,P

Si, P, C, N

P, Si, N, C

Rotary spinning process is used to produce

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Glass wool

Optical fibre

Glass marble

None of above

The metallic character of group 14 elements

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Decreases from top to bottom

Increases from top to bottom

Does not change gradully

Has no significance

Air pollution is not caused by

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Pollen grains

Hydroelectric power

Industries

automobiles

Which of the following energy is trapped by the autotrophic organisms.

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Mechanical energy

Electrical energy

Radiant energy

Electronic energy

Which of the following statement is not related with nitric oxide.

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It is a colorless and odourless gas

It is produced largely by fuel combustion

It is a brown pungent gas

It is oxidized to NO2

Acid rain effects

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Human being

Crops

Aquatic life

All above

Which of the following compounds is electrovalent in nature.

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SO2

ICI

KBr

CHI3

The osmotic pressure of a solution with definite composition.

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Varies directly as the volume and temperature.

Various inversely as the temperature.

Varies inversely as the volume and directly as the temperature.

None of the above

What is the lowest temperature diffusion hardening process and does not require a quench

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Carburizing

Tempering

Nitriding

Melting

Which of the following is not evoked in quantum theory?

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Schrodinger wave equation

The rigid rotor approximation

The particle in a box

Boltzmann distribution

Which of the following glass transmits the maximum light.

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Serrated glass

Clear glass

Milk glass

Opalescent glass

The orientation of a crystalline surface is confidently defined in terms of.

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Lijima Indices

Miller indices

Clausen indices

None

Keeping in view the periodic law and periodic table, suggest which of the following elements should have maximum electronegative character.

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Oxygen

Nitrogen

Fluorine

Astatine

Which of the following compounds liberates CO2 on heating.

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Li2CO3

Na2CO3

K2CO3

All liberate CO2 on heating.

Which of the following colligative properties can be used to characterize colloidal particles.

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Lowering in vapour pressure

Elevation in boiling point

Depression in freezing point

Osmotic pressure

Which of the following has the highest lattice energy

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LiCl

NaCl

KCl

CaCl

1-Chlorobutane on reaction with alcohols potash gives.

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1- butane

1-butanol

2- butane

2- butanol

Ammonia is utilized for

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Manufacture of urea

Oxidation to nitric acid

Manufacture of ammonium sulphate

All above

Which of the following metals form volatile carboyl with CO below 80^oC

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Cu

Fe

CO

Ni

Which of the following phenomena is not explained by the classical mechanics.

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Black body radiation

Photoelectric effect

Atomic and molecular spectra

Heat capacities of solids

All of the above

Catenation is a process of.

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Formaton of cations

Deposition of cations

Formation of long chain of identical atoms

Formation of covalent bond

Orion is polymer of.

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Styrene

CF2 = CF2

Vinyl chloride

Acrylontrile

Which of the following is not a naturally occurring dye.

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Indogo

Indigotin

Alizarin

Malachite green

The state of hybridization of Xe in Xe F6 are

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sp2

sp3

sp3 d

dsp3

Which is the following is not a buffer.

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H2CO3/HCO3

NH4Cl/NH4OH

CH3COOH/CH3COONa

NH3OH/CH3COOH

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