Question # 1

Which of the following liquids have low vapour pressure at 25°C

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Water

Ethyl alcohol

Acetone

Diethyl ether

CuSO₄5H₂O crystals belong to

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triclinic

cubic

tetragonal

orthorhombic

The process of coagulation can remove suspended solids in raw water about

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50%

60%

Less than 40%

More than 80%

Which one is non-reducing sugar?

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sucrose

glucose

fructose

galactose

What is correct about heat of combustion

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It is applicable to gaseous substances only

It is always negative

It is always positive

It is positive in some cases while negative in other

Which of the following gases have maximum root mean square velocity at 25°C:

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SO₂

NH₃

CO₂

H₂S

The % of CO₂in the atmosphere is

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3.0%

0.03%

0.3%

0.5%

Which of the following protein has application is food industry

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Globulin

Gelatin

Casein

All

ln ethyl alcohol, the bond that undergoes heterolytic cleavage most readily is

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C-C

C-O

C-H

O-H

In an elimination reaction a more substituted alkene is formed due to the stability associated with

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Free radical

transition state

Activated complex

Carbocation

The enthalpy change AH of a process is given by the relation

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ΔΗ =ΔΕ + P∆V

ΔH=ΔE +W

ΔH =ΔΕ-ΔnRT

ΔΕ =ΔΗ + P∆V

In a hydrogen-oxygen fuel cell, combustion of hydrogen occurs to

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Generate heat

Remove adsorbed oxygen from electrode surfaces

Produce High purity water

Create potential difference between two electrodes

The amino acids which human body can synthesize are called ______ amino acid

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Essential

Non essential

Acidic

Basic

Which compound is more soluble in water

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C₂H₅OH

Benzene

CH₃OCH₃

Hexane

The acids obtained by the hydrolysis of fats and oils are called

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Active compound

Fatty acids

Functional group

None

Which of the following elements is not stable:

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Xe

Ar.

Kr.

Li.

Fungicides are the pesticides which:

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Control the growth of fungus

Kill insects

Kills plants

Kills herbs

The widely used nitrogen fertilizer that contains about 46% nitrogen is

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Ammonia

Ammonium nitrate

Ammonium sulphate

Urea

The substance which increases rate of reaction but remains unchanged at the end of reaction is called :

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Catalyst.

Indicator.

Promoter.

Activator.

Aledehydes ketones can be prepared form alcohols by their:

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Reduction

Oxidation

Decomposition

Synthesis

Which of the following is lighter

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Li

k

Na

Ca

What is the shape of Fe(CO)₅molecule?

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Tetrahedral

Octahedral

Trigonal bipyramidal

Square pyramidal

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