Question # 1

Which of the following element belong to VIII A.

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Xe

Mg

Br

Na

The branch of chemistry that focuses on the study of polymers, their types properties, uses is called.

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Industrial chemistry

Polymer chemistry

Organic chemistry

Astrochemistry

Allotropes of oxygen are

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2

3

4

5

All Acids turn blue litmus.

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Pink

White

Colourless

Red

Whcih acid is present in our stomach.

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Nitirc Acid

Hydrochloric acid

Sulphuric acid

All of the above

Which of the following is insoluble salt

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KCl

AgCl

NaCl

CaCl2

Transfer of electron between elements result in.

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Coordinate covalent bonding

Ionic bonding

Metallic bonding

Covallent bonding

What conditon Should be met for the reversible reactio to achieve the state of equilibrium.

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The concentratio of all the reactants and the prodduct should become constant

all the reactants should be converted into the product

50% of the reactant shuld be converted into prodcuts.

One of the product should be removed from the reaction mixture.

Formula of Ozone.

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O₂

S₈

CO₂

O₃

Atoms achieve stability by attainign electonic configuration of.

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Alkali metals

Coinage metals

Inert Gases

Alkaline earth metals

Which of the following is Bronsted base?

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HCl

CH3COOH

H2O

NH3

Which acid is used for etching designs on copper plates?

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H₂SO₄

HNO₃

HCl

CH₃COOH

Industrial effluents are highly

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Toxic organic compounds.

Inorganic salts.

Heavy metals

All of them

Composition of carbon in the diesel oil.

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C₇-C₁₀

C₁₀-C₁₂

C₁₃-C₁₅

C₁₅-C₁₈

Which one of the following is a synthetic fiber:

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cotton

wool

nylon

silk

Dehydration means removal of.

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Water

Halogen

Hydrogen

All above.

Hydrogenation of vegetable oil to convert it into banaspatic ghee is carried out in the presence of catalyst:

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Ni-metal

Zn-metal

Na - Metal

Fe2O3

The ability of carbon atoms to form chains or ring called.

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Hydrogenation

Chlorination

Cantenation

Halogenation

Which gas creates suffocation and causes death?

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CO

CO₂

SO₃

SO₂

Clark's method is used to remove the hardness of water, in this method which is used.

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Ca(HCO₃)₂

Na-Zeolite

Ca-Zeolite

Ca(OH)₂

Almost all aircrafts fly in:

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troposphere

mesosphere

stratosphere

themosphere

Water is a;

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strong electrolyte

non-electrolyte

weak electrolyte

natural compound

Which has greater enthalpy of vaporization

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F2

Cl2

Br2

I2

If the volumes of reactants and products are same in a gaseous phase reaction, then the equilibrium state is not affected by

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Change of temperature

Change of pressure

Change of concentration

Catalyst

Which of the following is psuedo solid

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CaF2

Glass

NaCl

All

More abundant isotope of an element is the one with.

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Even atomic number

Odd atomic number

Even mass number

Odd mass number

The value of Rydberg constant is.

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1.6 x 10⁷ m-1

1.9768 x 10⁷ m-1

1.09678 x 10⁷ m-1

1.7904 x 10⁷ m-1

Down the VII -A group, polarizability generally.

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Increases

Decreases

Remain constant

Negligible

For a gas obeying Boyle's law if pressure is doubled, the volume becomes.

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Double

One half

Four times

Remains constant

Large value of distribution coefficient K means.

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Component of solute dissolved large in mobile phase

Components of solute do not dissolve in mobile phase

Components of solute remains at original spot

All statements are correct

The S.I. units for the molar heat capacity are

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Joule Cm^-3degree^-1

Joule deg^-1atm^-1

Joule deg^-1mol^-1

Joule deg^-1kg^-1

BF3 has zero while NH3 has 1.49 D dipole moment because.

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B is less electronegative than N

F is more electronegative than N

BF3 is pyramidal while NH3 is planar

NH3 is pyramidal while BF3 is trigonal planar

What type of bonding is present in NH4Cl

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Ionic

Covalent

Co ordinate covalent

All of these

In which substance silicon is not present.

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Talc

Asbestos

Dolomite

Zirocon

How much fresh water is used for domestic purpose

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8%

23%

69%

100%

The presence of a double bond in a compound is the sign of.

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Saturation

Unsaturation

Substitution

None of these

Which chemical reduces the acidity of soil.

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Lime

Urea

Ammonium nitrate

Ammonium sulphate

The substance that retard the activity of enzyme is called.

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Co enzyme

Epo enzyme

Activity

Substrate

S_N2 reactions can be carried out with

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Primary alkylhalide

Secondary alkyhalide

Tertiary alkylhalide

All of these

Setting process of cement is based upon

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Hydrolysis

Hydration

Dehydration

Botha a and b

In pyrite burner, the gas produced is.

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SO3

SO2

CO2

NO

Cannizzaro's reaction is given by

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Acetaldehyde

Formaldehyde

Propanal

Propanone

Which of the following derivative cannot be prepared directly from acetic acid

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Acetamide

Acetyl choride

Acetic anhydride

Ethyl acetate

Which one of the following polymers has no peptide linkage in it.

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Terlene

Nylon -6,6

Protein

None of these