Question # 1

The other name of modern periodic table is ________________ of periodic table.

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Long form

Simplified

Simplest

Nil

Which of the following can accommodate 18 electrons?

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K

L

M

N

H° - H° has ________________ energy.

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Lower

Higher

Medium

Nil

The elements of group 17 are called:

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Carbon family

Noble gases

Alkaline earth metals

Halogen family

The No. of atoms in 1 mole of carbiton is

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6.02 x 1021

6.02 x 1022

6.02 x 1023

6.02 x 1024

___________ is used in treatment of cancer.

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Cobalt-60

C-12

H-3

Nil

Gases have fixed ____________

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Shape

Volume

Area

Nil

A binary solution consists of:

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One component

Two components

Three components

Many components

In common, a solution has ___________ components.

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1

2

3

4

Copper extracted from its ore is ____________ % pure.

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98%

99%

96%

Nil

The fundamental unit of elements is ___________

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Molecule

Atom

Matter

Mixture

A group of gases that maintains temperature of atmosphere is.

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Carbon dioxide and water vapours

Nitrogen and carbon dioxide

Thermosphere

Troposphere

Lactose and maltose are;

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monosaccharides

disaccharides

trisaccharides

tetrasaccharides

Which part of digestive system glucose absorb.

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Stomach

Liver

Small intestine

Large intestine.

Cause of diarrhoea among following is:

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Diarrhea

Cholera

Cryptosporidium

Typhoid

Which help to keep the bowel functioning property

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Dietary fiber

Vitamins

Lipids

Carbohydrates

Mallic acid is present in

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Apple

Feats

String of bees

Urine

Building and Monuments lose their beauty and shine due to

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U.V radiations

Chlorofluoro carbons

Acid rain

IR radiations.

For a reaction between PCL₃ and Cl₂ to form PCl₅ the units of Kc are:

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Mol dm^-3

Mol^-1 dm^-3

Mol^-1dm³

Mol dm³

Lavoisier named binary compounds of oxygen acids in .

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1787

1790

1815

1828

Metallurgy involves which of the following steps?

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Mining and enrichment

Reduction

Refining and casting.

All of these

Water has a maximum density at .

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10^oC

0^oC

4^oC

100^oC

At which distance a molecule is present from its neighbor molecules of its own diameter, at room temperature.

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100 times

200 times

300 times

400 times

Which of the following orbitals is not possible.

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3p

4s

2d

Is

Orbitals having same energy are called

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Hybird orbitals

Valence orbitals

Degenerate orbitals

D-orbitals

Total pressure of mixture of two gases is.

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The sum of their partial pressures.

The difference of their partial pressures

The product of their practical pressures

The ratio of their partial pressures

The mathematical relation between the rate of reaction and the concentrations of the reactants is known as the

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Rate equation

Rate law

Arrhenius equation

Both a and b

The temperature of natural plasma is about.

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200000 ^oC

10000^oC

5000^oC

1000^oC

Stoichiometric calculations cannot applied to reversible reactions because.

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Product again changes to reactant

Less product is formed

Reaction goes only in one direction

Products do not disappear.

The spreading of fragrance of a rose or scent in air is due to.

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Effusion

Diffusion

Osmosis

Evaporation

Crystal to diamond is.

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Ionic

Molecular

Covalent

Metallic

CO+ is an example of.

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Free radical

Cationic molecular ion

Anionic molecular ion

Stable molecule

For the equilibrium system N2 + O2 + Heat = 2NO the equilibrium constant deceases by

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Decreasing the temperature

Adding a catalyst

Adding N2

Adding NO

Sulphuric acid acts as dehydrating agent in its reaction with.

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Sodium chloride

Potassium nitrate

Copper

Ethyl alcohol

The solution of which acid is used for seasoning of food.

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Formic acid

Acetic acid

Benzoic acid

Butanoic acid

Which statement is correct about the given reaction.

2NaOH + Cl2 --------------- NaCl + NaCIO + H2O

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Cl is oxidized and O is reduced

Cl is reduced and O is oxidized

Cl is oxidized as well as reduced

Neither Cl nor oxygen is reduced or oxidized

Ester are formed the reaction of carboxylic acid with.

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Alcohol

Ethers

Aldehydes

Alkyl halides

Which can produce ketone

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Sec alcohol

Calcium acetate

Propyne

All of these

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

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Eucalyptus

Wheat straw

Bagasse

Cotton linter

Which one of the following compounds is a heterocyclic.

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Anthracene

Phenol

Pyridine

Aniline

Which compound is the most reactive

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Benzene

Ethene

Ethane

Ethyne

Which is a secondary pollutant

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Carbonic acid

CO₂

SO₂

CO

The IUPAC name of CH3OCH6H5 is

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Methyl phenyl ether

Methaoxy benzene

Phenoxy methane

methoxy phenyl

Acetamide is prepared by

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Heating ammonium acetate

Heating methyl cyanide

Heating ethyl acetate

The hydrolysis of methyl cyanide