Question # 1

Formation of NO is

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Exothrmic

Endothermic

No Heat Change

None of these

Solubility of whcih salt increases with the increase of temperture.

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KNO3

KCL

NaNO3

All of These

Atomic number of actinium is

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57

60

89

80

Which of the following is insoluble salt

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KCl

AgCl

NaCl

CaCl2

Which of the following statement is not correct about isotopes.

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they have same atomic number

They have same number of protons

They have same physical properties

They have same chemical propeties

Which metal has the lowest melting point?

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Li

Na

Rb

K

Concentratin of reactants and product at equilibrium remains unchanged if

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Concentration of any reactant or product is not changed

Temperaure of the reation is not changed

Pressure or volume of the system is not changed

All of the above are observed

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

Empirical formula of hydrogen peroxide.

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HO

CO

CHO

CH

Which branch of chemistry helps to protectwater that bas been poisoned by soil.

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Organic chemistry

inorganic chemistry

Environmenal chemistry

Geochemistry

Identify the covalent compund

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NaCl

H₂O

KF

MgO

A conjugate acid is a specie formed by accepting a.

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Proton

Electron pair

Neutron

Electron

In solvay's process slaked lime is used to:

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Prepare CO₂

Prepare quick lime

Recover ammonia

Form Na₂CO₃

Molecular formula of stearic acid is.

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C₁₅H₃₁ COOH

C₁₂H₁₅COOH

C₁₅H₃₀COOH

C₁₇H₃₄COOH

Hook warm larvae enter the body through.

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Food

Water

Skin

All of them

Which is Pentahydroxy aldehydes of the following?

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Starch

Glucose

Fructose

Sucrose

Conversion of wood into coal is called.

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Carbonization

Destructive distillation

Fractional distillation

All

Amont the followign substitution reaction is characteristics of.

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Alkanes

Alkenes

Alkynes

None of these

When glucose and fructose combine and forms.

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Starch

Cellulose

Sucrose

None of these

The most important oligosaccharide is:

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Sucrose

Glucose

Fractose

Maltose

Froth flotation process is used to concentrate the ore on:

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Density basis

Concentration basis

Wetting basis

Magnetic basis

Hydrogen atoms preset in pentane are.

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10

12

14

16

When small amount of acid or base is added to buffer, its pH.

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Remain same

Always increases

Always decreases

slightly increases or decreases

A molecule has two ions pairs and two bond pairs around the central atom. The shape of molecule is.

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Linear

Pyramidal

Angular

Tetrahedral

Which molecule has sG2 hybridization.

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CH4

C2H4

C2H2

C2H5

VSEPR theory was proposed by

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Nyholn and Gillespie

Kossel

Lewis

Sidwick

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

Crystal to diamond is.

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Ionic

Molecular

Covalent

Metallic

The heat contents of the system of known as.

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Entropy

Enthalpy

Work

Free energy

Vapour pressure of a substance does not depend upon.

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Temperature

Intermolecular forces

Surface area

Physical state of water

The volume occupied by 1.4 g on N₂at S.T.P is

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2.24 dm³

22.4 dm³

1.12 dm³

112 cm³

Which is not decay product of free neutron

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Proton

Electron

Neutron

Antineutrino

Chromatography in which stationary phase is a solid is called.

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Partition chromatography

Paper chromatography

High pressure liquid chromatography

Adsorption chromatography

In which these process are small organic molecules made into macromolecules.

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The cracking of petroleum fractions

The fractional distillation of crude oil

The polymerization of ethene

The hydrolysis of proteins

Fluorine is in group VIIA of periodic table. Its chemistry will most closely resembles that of.

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Argon

Boron

Iodine

Sulphur

The smog which have high contents of SO2 in it, is called.

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Reducing smog

Oxidizing smog

Natural smog

Neutral smog

Galvanized iron is protected by a thin layer of

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Cr

Zn

Sn

Pb

In which substance silicon is not present.

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Talc

Asbestos

Dolomite

Zirocon

Which one of the following elements burns in air to form an oxide which, when shaken with water, give sa solution with a pH greater than 7.

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Carbon

Magnesium

sulphur

Hydrogen

Ethyne on oxidation with strong alkaline KMnO4 changes to

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Ethyl alcohol

Acetaldehyde

Vinyl alcohol

Glyoxal

The nature of lysine amino acid is

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Acidic

Basic

Amphoteric

Natural

Water will be considered polluted if it has dissolved oxygen.

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3ppm

4ppm

5ppm

6 ppm

Which of the following compounds will not give iodoform test on treatment with I2/NaOH

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Acetaldehyde

Acetone

Butanone

3-Pentaneone

The isomers having same functional group but different alkyl group on either side of functional group are called.

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Metamers

Polymers

Monomers

Homologous series