Question # 1

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

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0

2

6

3/2

Give violet colour to flame

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Gallium

indium

Thallium

Aluminium

Which of the following health effect is caused by lead.

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Cancer

Neurotoxin

Hypertension

Kidney damage

Bioconversion of biomass can be used for.

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Heating purposes

Power production

Methane production

All of the above

Zinc oxide is.

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A basic oxide

An amphoteric oxide

An acidic oxide

A neutral oxide

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

A pH of a neutral solution at 100 ^oC when Kw = 1.0 x 10^-12

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0

7

6

7

Fish die in water bodies polluted by sewage due to.

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Pathogens

Clogging of gills by silt

Reduction in dissolved oxygen

Foul smell

The basic strength of hydrides of group 15 elements very in the following order.

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NH3 > PH3 > AsH3 > SbH3 >BiH3

PH3 > NH3 > AsH3> SbH3 > BiH3

BiH3> NH3 >PH3 > AsH3 > SbH3

NH3 > PH3 > SbH3 > AsH3 > BiH3

Noble gases are sparingly soluble in water owing to.

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Dipole -dipole interactions

Dipole -induced dipole interactions

Hydrogen bonding

Induced dipole -instantaneous dipole interactions

Which of the following gas is not used as carrier gas in GC.

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Argon

Nitrogen

Helium

CO2

Carbon and Hydrogen are estimated by

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Liebig's method

Kjeldhal's method

Carries method

None of the above

Gold dissolves in aqua regia forming

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AuCl

Au(NO3)3

AuCl3

HAuCl4

Lother Meyer plotted a graph showing variation of.

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Atomic volume with increase in atomic number

Atomic volume with increase in atomic weight

Atomic redii with increase in atomic weight.

Atomic weight which increase in atomic number

Which of the following statement is not correct with respect to radioactive pollutnats.

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Carcinoma and breast cancer

Leukemia

Increases biological immune system

Somatic and generic disorder

The emission of light characteristics of metal and correlation of intensity of the light emitted with concentration of that metal forms the basis of.

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Roman spectroscopy

IR spectroscopy

Flame photometry

Rotational spectroscopy

J.J. Thomson established certain properties about cathode rays. Which of the following is not related to cathode rays.

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Cathode rays from a gas discharge tube consists of negatively charged particles

Cathode rays are called electrons.

The e/m ratio of cathode rays depends on the gas inside

Cathode rays are affected by electric and magnetic fields.

What element is the most abundant by mass in the Earth's crust.

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Fe

H

O

K

What is a process for making glass reinforced shapes that can be general by polling resin impregnated glass stands though a die.

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Continuous pultrusion

Bulk molding

Vacuum bag forming

Computational analysis

Which of the following item is not symmetry element.

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Pllane of symmetry

Inversion centre

Improper rotation

Optical activity

Organic farming is the technique of raising crops through uses of.

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Manures

Biofertilizers

Resistant varieties

All of these

The flow of solvent into a solution when two are separated by a semi -permeable membrane is called.

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Mixing

Effusion

Diffusion

Osmosis

The aluminium alloy used to make parts of aircrafts is.

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Magnalium

Aluminium bronze

Duralumin

All of the these

At higher altitudes, the boiling point of water is lowered because.

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Atmospheric pressure is low

Temperature is low at high altitude

Atmospherics pressure increase

None of the above

Select a basic amino acid.

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Glycine

Cystine

Alanine

Lysine

Which of the following is strongest reducing agent.

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Be

Mg

Ca

Sr

Iso-osmotic solutions are those which have the same.

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Vapour pressure lowering

Osmotic pressure

Molality

Boiling point elevation

How many stereoisomers are possible for CH3CH = CHCHCH(Br) CH3

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2- geometrical isomers

2- optical isomers

2- geometricla nad 2- optical isomers

2- geometrical and 1 optical isomers

Which of the following characteristics of adsorption is wrong.

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Adsorptoin on solids is reversible in nature

Adsorption, in general increase with increase in temperature.

Adsorption is generally selective in nature.

Both enthalpy and entropy of adsorption are negative

According to Arrhenius theory an acid is defined as substance which

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Accepts and electron pair

Donatees H+ ion in ammonia

Contains Cl- ions

Furnishes H3O + ion in water

Which of the following detector is used for compounds containing electronegative atoms.

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Mass specdtrometer

ECD

TCD

UV-detector

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