Question # 1

Which impurity makes the shape of NaCl crystal needle like

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MgSO4

urea

glucose

MgCO3

What does no happen when an ideal gas is heated?

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an increase in the average energy of the gas particles

an expansion in the range of kinetic energies possessed by particles

an increase in the number of molecules with lower energies

a drop in the number of molecules with lower energies

General formula of aliphatic carboxylic acids:

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R-OH

R-COH

R-CO-R

RCOOH

Which value is designated as absolute zero or zero of the Kelvin scale?

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-273.15°C

-173.15°C

273°C

none of these

Which of following is primary pollutants

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N₂O

PAN

H₂SO₄

None of these

Which of the following does not contribute towards the formation of photochemical smog?

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NO

SO₂

O₃

Hydrocarbons

Which of the substance is not going to react the sodium metal:

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Acetic acid

Methanol

Di methyl ether

Ethanol

Which of the following is not a charbohydrate

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Nuclic acid

Starch

Glycoyen

Cellulose

Naturally occuring lipids are called

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Fats

Protein

Steroids

None

Air pollution causes

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Acid rain

O₃ depletion

Green House Effect

All

To distinguish aldehyde from ketone which solution is used

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Alkaline solution

Fehling's solution

A solution containing K2Cr2O7

A solution containing acid only

Forms of waste products :

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Heat

Smoke

Solid

All of these

In which of the following reactions is the inorganic reagent acting as a nucleophile

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The valency of noble gases, in general, is

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Zero

One

Three

Two

The addition of a catalyst to a reaction changes the

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Enthalpy

Entropy

Nature of reactants

Energy of activation

Vegetable oils are

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Unsaturated fatty acids

Glycerides of unsaturated fatty acids

Glycerides of saturated fatty acids

Essential oils obtained from plants

The major reaction occurring in the engines of automobiles is

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Oxidation

Reducing

Combustion

Decomposition

Aldehydes are produce in atmosphere by

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Oxidation of secondary alcohols

Reduction of alkenes

Reaction of oxygen atoms with hydrocarbons

Reaction of oxygen atoms with ozone

Benzene has a -------- structure

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Pentagonal

Hexagonal

Heptagonal

Tetragonal

Butyric acid was named from butyrum means:

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Red out

Vinegar

Butter

Milk

f-block elements are called :

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Alkali metal

Alkakline earth metals

Transition elements

Electron deficient elements

Half life period of a first order reaction is independent of:

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Presence of catalyst.

Conditions of temperature

Initial concentration of the compound

All of above

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