Question # 1

Brine is an aqueous solution of

Choose an answer

NaCI

NaOH

AgNO3

CaO

1 atm = ?

Choose an answer

1 pascal

760 mm of Hg

1 atm

1 Nm^-2

One atmospheric pressure is equal to how many pascals?

Choose an answer

101325

10325

106075

10523

The number of proton in an atom is called _________ number.

Choose an answer

Molecule

Formula

Atomic

Molar

A _________ is a pure substance is made up of two or more elements.

Choose an answer

Mixture

Elements

Solution

Compound

Which gas will diffuse faster than others?

Choose an answer

Hydrogen

Oxygen

Chlorine

Nitrogen

Which molecules is donor in nature?

Choose an answer

H₂

NH₃

O₂

HF

Tyndall effect is due to:

Choose an answer

block of beam of light

non - scattering of beam of light

scattering of beam of light

passing through beam of light

The third abundant as found in the earth' crust is:

Choose an answer

Carbon monoxide

Oxygen

Nitrogen

Argon

How many covalent bond does C₂H₂ molecule have?

Choose an answer

two

three

four

five

The number of periods is:

Choose an answer

6

7

8

9

Which one of the following statements about glucose and sucrose is incorrect.

Choose an answer

Soluble in water

Naturally occuring.

Carbohydrates

Disaccharides

Such reaction which can be made proceed in either direction depending upon the condition:

Choose an answer

simple reaction

reversible reaction

irreversible reaction

chain reaction

^{RNA consists of}

Choose an answer

Ribos

Pentose

Hexose

Trioses

The substance formed during the chemical reaction are called.

Choose an answer

Products

Reactants

Radical

Element

The formula which represents the actual number of atoms in one molecule of organic compound is called.

Choose an answer

Molecular formula

Structural formula

Condensed formula

Dot and cross formula

Building are being damaged by acid rain because it attacks.

Choose an answer

Calcium sulphate

Calcium nitrate

Calcium carbonate

Calcium oxalate

Fossil fuel means.

Choose an answer

Coal

Petroleum

Natural gas

All of them

The characteristics of reversible reactions are the following except:

Choose an answer

Products never recombine to form reactants.

They never complete

The proced in both ways

They have a double arrow between reactants and products.

The product of Lewis acid-base reaction is called adduct. The bond between the adduct species is.

Choose an answer

Ionic

Covalent

Metallic

Co-ordinate covalent

Which one of the following gas has greater retaining capacity?

Choose an answer

O₂

N₂

CO

CO₂

Active mass is expressed as:

Choose an answer

{ }

[ ]

( )

l l

Gases exert pressure on the walls of the container becasue the gas molecules.

Choose an answer

Collide with each other

Collide with walls of container

Have definite volume

Obey the gas laws

As the quantum number n increases, the energy difference between adjacent energy level.

Choose an answer

Increase

Remain same

Decrease

No correlation

With increases of 10 oC temperature the rate of reaction doubles. This increase in rate of reactions is due to.

Choose an answer

Decrease in activation energy of reaction

Decrease in the number of collisions between reactant molecules

Increase in activation energy of reactants

Increase in number of effective collisions

Repeated extraction using small portions of solvent are more.

Choose an answer

Accurate

efficient

Slow

Rapid

Which of the following solutions will have the highest boiling point

Choose an answer

0.1 M NaCI

0.1 M CaCI₂

0.1 M FeCI₃

0.1 M glucose

In Al2O3, the ratio between the ions is

Choose an answer

1 :2

2:1

2:3

3:2

Ice float over water because.

Choose an answer

Its structure is diamond like

Its density is maximum at 4 ^oC

It is less dense than water

It has no regular arrangement of molecules.

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

Choose an answer

Joule Cm^-3degree^-1

Joule deg^-1atm^-1

Joule deg^-1mol^-1

Joule deg^-1kg^-1

The comparative rates at which the solutes move in paper chromatography depends on.

Choose an answer

The size of paper used

Their Rt values solutes

Temp of the experiment

Size the chromate grapic tank

The rate of diffusion of a gas is

Choose an answer

Directly proportional to its density

Directly proportional to molecular mass

Inversely proportional to its density

Inversely proportional to square root of its molecular mass

Whenever a reaction is endothermic, then it means that

Choose an answer

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

Which one of the followings is woody raw material used for making pulp and paper

Choose an answer

Eucalyptus

Wheat straw

Bagasse

Cotton linter

When methane reacts with Cl2 is commonly known as

Choose an answer

Mustard gas

Laughing gas

Phosgene gas

Bio gas

The conversion of potassium magnate to potassium permanganate by passing Cl2 Through aqueous solution of K2MnO4 is called.

Choose an answer

Contact process

Open hearth process

Stadeler's process

Thermite process

Which substance is water repellant and used in ceramic insulators.

Choose an answer

Asbestos

Lead compounds

Silicon carbide

silicones

Which one of the following enzyme is used for the treatment of blood cancer in children.

Choose an answer

Thrombin

Asparaginase

Glucokinase

Fumarase

Which catalyst is used in contact process.

Choose an answer

Fe2O3

V2O5

SO3

Ag2O

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

Choose an answer

Acetaldehyde

Acetone

Butanone

3-Pentaneone

Benzene cannot undergo

Choose an answer

Substitution reactions

addition reactions

oxidation reactions

elimination reactions

Acetamide is prepared by

Choose an answer

Heating ammonium acetate

Heating methyl cyanide

Heating ethyl acetate

The hydrolysis of methyl cyanide

Number of peptide bonds in tripeptide is

Choose an answer

1

2

3

4

------------- metal is used in the Thermite process because of its reactivity

Choose an answer

Tron

Copper

Aluminium

Zinc