Question # 1

Identify the covalent compund

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NaCl

H₂O

KF

MgO

The amoutn of energy given out when an electron is added to an eatom is called.

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Electron affinity

Lattice energy

Ionization energy

Electronegativity

A bond formed by the mutual sharing an electron pair is called.

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Ionic bond

Metallic bond

Covalent bond

Coordinate covalent bond

Which molecule contains a single vovalent bond.

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CH4

C2H4

C2H2

O2

All chemical reaction involves.

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Enzymes

Catalyst

Energy changes

All of these

Which of the following cannot be classified as Arrhenius acid

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CO2

HNO3

H2CO3

H2SO4

The study of theinteraction between drugs and biological targets, as wellas the development of new medicinal agents.

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Inorganic Chemistry

Organic chemistry

Medicinal Chemistry

Environmental chemistry

Point out the incorrect statement about electron affinity

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It decreases in a period

It decreases in a group

It is measure din kJmol-1

None of these

The enthalpy of reaction 2H2 +O2-----2H2O

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-571.6 kJ

-110.5 kJ

-393.5 kJ

+53.8 kJ

The new substance formed in a chemcial reaction is.

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Reverse

Reactant

Forward

Product

The vertical columns present in the priodic table are called.

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Group

Period

Both a and b

None of these

Which is disaccharide?

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Glucose

Fructose

Sucrose

Starch

Acids have taste

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Bitter

Seetish

Sour

Saltish

The strong heating of coal in the absence of air is called.

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Carbonization

Destructive distillation

Fractional distillation

All

Which one of the following is crystalline solid.

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Glucose

Starch

Cellulose

Glycogen

Normal rain water is:

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weakly acidic

strongly acidic

weakly basic

strongly basic

Formula of Decane is.

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C₁₀H₂₀

C₁₀H₂₂

C₁₀ H₄

C₁₀H₁₆

General formula of alkenes.

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C_n H_2n-2

C_nH_2n

C_nH_2n+2

C_nH_2n-1

The product of any Lewis acid-base reaction is a single specie called:

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free radical

adduct

molecular ion

conjugate

Water which produces good lather with soap is called.

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Soft water

Hard water

Heavy water

All of them

The process by which water rises up from the roots of plants to leaves is called.

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Photosynthesis

Respiration

Surface tension

Capillary action

A group of gases that maintains temperature of atmosphere is.

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Carbon dioxide and water vapours

Nitrogen and carbon dioxide

Thermosphere

Troposphere

The relationship between K_pand K_cis given by

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Hund's rule state that when electrons enter to the same sub levels they are.

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Singly occupied with same spin

Doubly occupy with same spin

Singly occupied with different spin

Doubly occupied with different spin

Which has zero potential energy.

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When H atom is independent

When two H atoms combine to form H2 molecule

When two H atoms super impose to each other

When two H atoms have weak attraction between them

The substance used for decolorization of crystalline substance is

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G2O5

Chloroform

Animal charcoal

Soda ash

"The components of which mixture can be separated by filtration".

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NaCl and CaCl2

Calcium carbonate and NaCl

Blue and green inks

Sand and naphthalene

Unit of rate constant is the same as that of the rate of reaction in

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Zero order reaction

1st order reaction

2nd order reaction

3rd order reaction

In Daniel cell, if salt bridge is removed between the two half cells, the voltage.

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Drops to zero

Does not changes

Increases gradually

Increases rapidly

The lightest value of lattice energy is for which one of these ionic compounds.

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NaI

NaF

NaBr

NaCl

A chemical change always involve

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Absorption of heat

Evolution of heat

Either absorption or evolution of heat

The liberation of heat and light energy

In Al2O3, the ratio between the ions is

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1 :2

2:1

2:3

3:2

Which of the following mixtures of liquids show negative deviation

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Methyl alcohol water

Hydrochloric acid water

Carbon di sulphide chloroform

Chlorobenzene bromobenzene

Acetaldehyde can be prepared by the oxidation of.

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Acetic acid

Ethanol

1- Proponal

Ethanonic acid

Which nitrogen fertilizer make the soil acdic.

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Calcium nitrate

sodium nitrate

Potassium nitrate

Ammonium nitrate

Absolute alcohol is that which is

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100%

95%

Ethanol mixed with methanol

Ethanol mixed with H2O

Ozone depletion in stratosphere region is mainly due to the reaction of O3 with

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O2

SO2

CFCs

All of these

Chlorine heptoxide (CI₂O₇) reacts with water to form

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Hypochlorous acid

Chloric acid

Perchloric acid

Chlorine and oxygen

Zwitter ion is

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Dipolar ion

Amino acid with two amino groups

Amino acid with two carboxylic acid group

A synthetic amino acid

When acetylene is heated at 300 ^oC in copper tube, the product obtained is.

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Benzene

Alkyl benzene

Ether

Alcohol

Venyl acetylene combines with HCl in

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Polyacetylene

Benzene

Chloroprene

divinyl acetylene

Which one of the following compounds is the isomer of ethyl alcohol.

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CH3OH

CH4OCH3

CH5-CH(OH)CH3

CH3OC2H5

Sulphur is essential constituent for plants. Which is not role of sulphur

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Chlorophyll development

Development of root system

Constituents of some proteins

Increase transpiration force

The degree of unsaturation of fat is measured by

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Iodine number

Oxidation number

Reduction number

Saponification value