Question # 1

Whcih one of the following wil show negligible effect of termperture on its solubility.

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KCl

KNO3

NaCl

NaNO3

Whcih is true about the equilibrium state?

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The forard reaction stops

Both forward and reverse reactions stop

Both foward and reverse reactions continue at the same rate

The reverse reaction stops

When molten copper and olten zinc are mixed together , they give rise to a new substnce called brass. Predict what type of bond is formed between copper and zinc.

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Ionic bond

Coordinate Covalent bond

Metallic bond

Covalent Bond

A base is a substance which neutralizes an acid. Which of these substances is not aa base.

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Aqueious ammonia

Calcium oxide

sodium Chloride

Sodium carbonate

Matter is present in neon signs in the state of

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Supereritical fluid

Gas

Liquid Crystal

Plasma

Whcih acid is present in our stomach.

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Nitirc Acid

Hydrochloric acid

Sulphuric acid

All of the above

The element having less value of ionizatin energy and less value of electron affinity is likely to belong to.

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Group1

Group 13

Group 16

Group 17

What will hapen to the concentrations of the prodcut if a reversible reaction at eqiulibrium is not distrubed.

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They will keepon increasing

They will keep on decreasing

They will remain constant

They willremain constant for some time and then start decreasing

All chemical reaction involves.

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Enzymes

Catalyst

Energy changes

All of these

Which isotope is used in nuclear reactors.

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U-234

U-235

U-238

All of these

The structure of C atom in diamond is.

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Pentagonal

Triangle

Hexahedral

Tetrahedral

Which metal present in acid rain affect the aquatic life by clogging fish gills?

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Lead

Chromium

Aluminium

Mercury

Which compound do not produce in the halogenation of methane.

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Chloroform

Carbon tetrachloride

Carbon black

Chloromethane

A strange bitter smell noticed near photocopiers is of:

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SO2

H2S

O2

O3

Permanent hardness can be removed by using .

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Soda lime

Sodium Zeolite

Quick lime

Lime water

Depending upon temperature variation, atmosphere ins divided into how many regions?

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1

2

3

4

Ionic compounds are soluble in water due to:

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Hydrogen bonding

ion-dipole forces

Dipole-dipole forces

Dipole -induced dipole forces

What is the POH of a 0.02 M Ca(OH)₂?

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1.698

1.397

12.31

12.61

The end product of oxidation of acetylene is .

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Oxalic acid

Glyoxal

Glycol

None of these

Nucleic acids made up of long chain of.

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Nucleotide

Fatty acids

Amino acid

None of them

Which is the substitution reaction in the following?

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Halogenation of alkenes

Halogenation of alkynes

Bromination of alkene

Halogenation of alkanes

The process of roasting during metallurgy of copper is carried out in a special furnace called.

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Blast furnace

Fire furnace

Bessemer converter

Reverberatory furnace

Rate of diffusion of CO and N₂are same at room temperature due to the reason, that

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Both are diatomic molecules

Both have same multiple bond in them

Both have lone pairs in them

Both have same molar masses

Whenever a reaction is endothermic, then it means that

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Heat is transferred from surrounding to the system

Heat is transferred system to the surrounding

Heat content of the product is greater than that of reactants

Heat content of the reactants is greater than the products

Splitting of spectral lines when atoms are subjected to strong electric field is called.

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Zeeman effect

Stark effect

Photoelectric effect

Compton effect

Which of the following compound has the highest % o f oxygen by weight

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CH₃- OH

C₂H₅OH

HCOOH

H₂O

Which compound does not obey the octet rule.

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NH3

BCl3

H2O

CH4

The oxidation of O -atom in OF3 is.

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-2

+2

-1

+1

The long chains of amino acids are coiled about one another onto a spiral by

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Ionic bond

Van der walls forces

Hydrogen bonding

Overlapping of orbitals

Fuel cells are the means by which chemical energy may be converted into

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Heat energy

Magnetic energy

Sound energy

Electric energy

An Ideal gas can not be liquefied because.

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Its critical temperature is always above 0 ^oC

It molecules are relatively smaller in size

Its solidify before becoming a liquid

Force operative between its molecules are negligible

Which one of the following gases diffuse more rapidly.

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Cl2

CO2

CH4

N2

Pressure remaining constant, at which temperature the volume of a gas will become twice of what it is at 0 ^oC

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546 ^oC

200 ^oC

546 K

273 K

The state of hybridization in ethene molecule is

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dsp²

sp³

sp²

sp

The most reactive Alkyl halide is

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Alkyl Iodide

Alkyl Bromide

Alkyl fluoride

Alkyl Chloride

The process in when alkene are converted into carboxylic acid is known as

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Oxidation

Reduction

Hydrolysis

Hydration

The yellowish colour in photochemical smog is due to the presence of.

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NO

NO2

SO2

CO2

As you proceed across a period in the periodic table the first ionization energy

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Decrease

Increase

Remains constant

First increase up the middle of period and then decreases

Which of the following is a typical transition metal

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Sc

Y

Ra

Co

The anhydride of HCIO₄is

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CIO₃

CIO₂

Cl₂O₅

Cl₂O₇

In which process, an amino acid is produced

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Wurtz synthesis

Strecker synthesis

Kolbe synthesis

Cannizzaro reaction

The addition of unsymmetrical reagent to an unsymmetrical alkene is in accordance with the rule

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Hund's rule

Markowikov's rule

Pauli's Exclusion Principle

Aufbau Principle

Which one of the following uses is not correctly related with the halogen.

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fluorine -------- Teflon

Chlorine ---------Bleaching powder

Bromine ---------------PVC plastics

Iodine -----------Iodex

The amount of free fatty acid in fats and oil is determined by

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Iodine number

Acid number

Saponification number

Gold number