Question # 1

What will be the relative atomic mass of nitrogen given the abundance of its two isotopes, ¹⁴ N and ¹⁵N are 99.64 and 0.35

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14.0210

14.2100

14.0021

14.1200

Which of the following is a heterogeneous mixture

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Concrete mixture

a solution of potassium nitrate in water

a solution of calcium hydroxide in water

Hot chocolate

If reversibe reaction useful for preparing compounds on large scale.

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Yes

No

They are useful only when equilirbium lies far to the left side

They are useful only when equilibrium lies far to the right side

1- gram atom of carbon contain hwo many moles.

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1 mole

2 mole

6 moles

12 moles

N-shell contains number of subshells.

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1

3

4

2

Allotropes of oxygen are

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2

3

4

5

Solubility of whcih salt increases with the increase of temperture.

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KNO3

KCL

NaNO3

All of These

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

The unit of ionization energy is

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nm and pm

kJ mol-1

Pascal

Newton

Water has high boiling point as compared a alcohol due to

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Low density

High surface tension

Hydrogen bonding

High vapour pressure

Number of electrons that an be accomodated in f - subshell

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6

10

2

14

A salt always

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Contain ions

Contains water of crystallization

Dissolves in water

Forms crystals which conduct electricity

Global warming is because of.

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Absorption of infrared radiation emitted by earth surface.

Absorption of infrared radiation coming from sun.

Absorption of infrared Ultraviolet coming from the sun.

Emission of ultraviolet radiation from the earth's surface.

The range of temperature in burning solid waste burning in incinerators is.

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650 ^oC - 1000 ^oC

650^oC - 11000^oC

1000^oC - 2000^oC

650^oC - 1000^oC

5000^oC - 1000^oC

You want to dry a gas which one of the following salt you will use?

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CaCl₂

NaCl

CaO

Na₂SIO₃

Which gas is used to manufacture king of chemicals sulphuric acid?

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N₂

O₂

Cl₂

S

Temporary hardness is removed by adding.

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Quick lime

Slaked lime

Lime stone

Lime water.

Which one of the diseases causes severe diarrhea and can be fatal?

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Jaundice

Dysentery

Cholera

Typhoid

Specific Heat capacity of water is about.

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4.0 Jg^-1 K^-1

4.1 Jg^-1K^-1

4.2 Jg^-1K^-1

4.3 Jg^-1K^-1

The process of removing temporary hardness of water.

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Clark's method

Washing soda method

Sodium zeolite

Filteration method

Molecular formula of stearic acid is.

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C₁₅H₃₁ COOH

C₁₂H₁₅COOH

C₁₅H₃₀COOH

C₁₇H₃₄COOH

Building and Monuments lose their beauty and shine due to

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U.V radiations

Chlorofluoro carbons

Acid rain

IR radiations.

If uncertainty in position of electron is zero, the uncertainty in its momentum would be.

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zero

Less than zero

Infinite

One

Solvent extraction is an equilibrium process and is controlled by.

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Law of mass action

The mount of solvent used

The amount of solute

Distribution law

Which one of the following relationship is correct about energy and frequency.

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E = hv

E = h/v

E = v/h

h = v/E

In the ground state of an atom, the electron is present

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In the nucleus

In the second shell

Nearest to the nucleus

Farthest from the nucleus

Down the VII -A group, polarizability generally.

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Increases

Decreases

Remain constant

Negligible

Gas equation is derived by combining

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Avogadro's and Charles's Law

Boyle's and Charles's Law

Avogadro's and Boyle's Law

Avogadro's, Boyle's and Charles's Law

Ascorbic acid is vitamin.

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A

B

C

D

NH3 shows a maximum boiling point among the hydrides of the group V elements due to.

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Very small size of nitrogen

Long pair of electrons present on nitrogen

Enhanced electronegative character of nitrogen

Pyramidal structure of NH3

The wave number of the light emitted by a certain source is 2 x 10⁶m. the wavelength of this light is

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500 nm

500 m

200 nm

5 x 10⁷m

The molecules of CO₂in dry ice form the

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Ionic crystal

Covalent crystals

Molecular crystals

Any type of crystals

The pH of human blood is

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7.0

7.4

4.0

6.5

Common names of aldehydes are derived from the common names of.

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Alcohol

Ketones

Carboxylic acids

Alkenes

In t-butyl alcohol, the tertiary carbon is bonded

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Three hydrogen atoms

Two hydrogen atoms

One hydrogen atom

No hydrogen atom

Which of the following the highest hydration energy

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Li⁺

Na⁺

K⁺

Mg⁺⁺

Which of the following acid can be used as a catalyst in Friedel Craft's reactions

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AlCl₃

HNO₃

BeCl₂

NaCl

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

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Terlene

Nylon -6,6

Protein

None of these

Iodine deficiency in diet is known to cause.

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Beri Beri

Goiter

Rickets

Night blindness

Which nitrogen fertilizer make the soil acdic.

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Calcium nitrate

sodium nitrate

Potassium nitrate

Ammonium nitrate

Which one of the following is a compound protein or conjugate protein.

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Legumin

Albumin

Collagen

Phosphoprotein

Structure of benzene is

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Tetrahedral

Trigonal planar

Hexagonal planar

Linear

An element that has high ionization energy and tends to be chemically inactive would most likely to be

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an alkali metal

a transition element

a noble gas

a halogen

Bromine can be liberated from KBr solution by the action of.

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I2 solution

Chlorine

NaCl

KI