Question # 1

Sea gets polluted bu accidental oil spills and

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Atmospheric pressure

Nitrogen gas

Cargo oil tankers

Aero plane

Some of crystals are good conductors of heat and electricity, they may be

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ionic in nature

of metallic character

covalent in nature

of molecular nature

Acetaldchyde and ketone form addition product with

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Phenyl hydrazine

Hydroxylamine

Hydrazine

hydrogen cyanide

By the electrolysis of CuCl2 using inert electrodes of platinum which species is deposited at cathode

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H2

O2

Cu

CI

Which of the following is the correct equation to calculate relative molecular mass of a gas

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M=mPRTV

M=mPR/VT

M=PV/mRT

M=mRT/PV

In intense electrical field and at a very high temperature matter generally exist in

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Solid state

Plasma state

Liquid state

Gaseous state

The phenomenon in which sudden expansion of a gas causes cooling is called

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evaporation

cooling

Joule Thomson effect

sublimation

In the reaction A2 (g) + 4B2 (g) <-----------> 2AB4 (g) such that ∆H < 0, the formation of AB4(g) will be favoured at

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Low temperature and high pressure

Low temperature and low pressure

High temperature and low pressure

High temperature and high pressure

Albumin is

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Insoluble in water

Heat coagulable protein

A plant protein

A protein of low biological value

The ratio of volume to temperature on Kelvin scale is constant according to:

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Charle's law

Newton's law

Coulomb's law

Boyle's law

The critical temperature of CO₂______°C at 73 atm critical pressure

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21.142

28.892

31.142

35.452

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di(4-bormophenyl) method

Methanol

Propan-1-ol

Propan-2-ol

Which of the following d-block elements can show the highest oxidation number in its compounds

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Chromium

Copper

Nickel

Manganese

Phenol is a weak acid. The correct order of acid strength of carboxylic acid, phenol and alcohol is

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Carboxylic acid > phenol > alcohol

Carboxylic acid > alcohol > phenol

Phenol > carboxylic acid > alcohol

Alcohol > phenol > carboxylic acid

K_spvalue for PbSO₄= 1.8 x 10^-8mole²dm^-6. The maximum concentration of Pb⁺⁺ions is

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1.34 x 10^-4mole dm^-3

1.8 x 10^-4

3.6 x 10^-16mole dm^-3

1.0 x 10^-8mole dm^-3

The monomeric units of starch is/are

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Glucose

Fructose

Glucose and fructose

Mannose

Which of the following reactions is used for detecting presence of carbonyl group?

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Reaction with hydroxylamine

Reaction with hydrazine

Reaction with phenyl hydrazine

All

According to modern theory of chemical bonding atoms form bonds as it leads to a:

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Increase in energy.

No energy change.

Decrease in energy.

First decrease then increase in energy.

The oxidation number of each element of group ll-A is

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0

+1

+2

-1

To determine the rate of reaction chemically a graphical method is applied. A graph is plotted between the amount or reactant decomposed or product formed against the time. The rate d_x/d_tat any time is equal to

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k

Tangentθ

1/a, a is initial conc.

1/a²

Hydrocarbon which is liquid at room temperature is

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Pentane

Butane

Propane

Ethane

The hydrocarbon used for polymerization is

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Alkanes

Alkenes

Alkynes

All of above

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