Question # 1

Noble gases are non -reactive, because they do not.

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Gain electrons

Lose electrons

Share electrons

All of these

Macroscopic propertues are properties that can be visualized by

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Telescope

The naked eye

Microscope

Electron microscope

If the Delta H value is negative then reaction witll be

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Endotermic

Exothermic

May or may not be exothermic or endothermic

None of these

Who performed fist experiment to split atom

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Bohr

Newton

Rutherford

Soddy

Which one of the following is heterogeneious mixture.

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Milk

Ink

Sugar solution

Milk of magnesia

Covalent bond is most commonly found between the elements of group

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1 to 13

16 to 18

13 to 17

15 to 18

Ionic compund are good conductors electricity in

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Solution

Molten state

Solid state

both a and b

Number of protons in the nucleus of an atom is called.

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Atomic number

Mass Number

Mass Unit

Electron Number

All transition elements belong to

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s and p block

d- block

f-block

d and f block

Which compound formed when SO2 is dissolved in water

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H2SO3

SO3

H2SO

H2S2O7

Limes is another name of

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Sodium hydroxide

Sodium Carbonate

Calcium Carbonate

Silicon dioxide

Silicon occurs in the form of

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Silica

Silicates

both a and b

None of these

Cause of global warming is:

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CO₂gas

SO₂gas

NO₂gas

O₂gas

Catalytic converters convert.

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CO to CO₂

N₂ to NO

CO₂ to CO

N₂to NO₂

Which gas is evolved when acids react with carbonates and bicarbonates?

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Carbon monoxide

Carbon dioxide

Hydrogen

Hydrogen chloride

Arrhenius presented his concept about acids and bases in.

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1785

1787

1923

1930

Which of the following is the hardest coal?

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Pear

Lignite

Bituminous

Anthracite

Forest fires and burning of wood emit.

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CO₂

NO₂

SO₂

Cl₂

Which gas is responsible in warming the atmosphere?

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Nitrogen

Hydrogen

Helium

Fluorine

|Which one is not an Arrhenius acid?

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HCl

H2SO₄

CO₂

HNO₃

Alkanes do not react in

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Diffused sunlight

Dark

Bright sunlight

None of these

Which one of the following is a synthetic fibre?

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Cotton

Wool

nylon

silk

The unit of rate constant depends upon

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Number of reactants

Concentration terms

Order of reaction

Molecularity of reaction

Solvent extraction method is a particularly useful technique for separation when the product to be separated is.

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Non volatile or thermally unstable

Volatile or thermally stable

Non volatile or thermally stable

Volatile or thermally unstable

Bohr's model of atom, is contradicted by.

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Planck quantum theory

Pauli's exclusion prinsciple

Heisenberg's uncertainty principle

All of the above

Energy and wavelength of a photon are related as.

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Direct

In direct

No correlation

Inverse under root

The e/m value for the positive rays in maximum for the gas.

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Helium

Oxygen

Nitrogen

Hydrogen

Which one of the following is not property of a good solvent.

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It should be inexpensive

It should dissolve impurities easily

It should dissolve large amount of solute at boiling point and less amount of solute at low temperature.

It should not react chemically with solute

London dispersion forces are the only forces present among the

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Molecules of water in liquid state

Atoms of helium in gaseous state at high temperature

Molecules of solid iodine

Molecules of hydrogen chloride gas

______ Molecule has zero dipole moment.

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CO

H2S

SO2

CH4

Which of the following molecule obey octet rule.

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BF3

BCl3

NH2

SF6

In which molecule all atoms are coplanar.

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CH4

BF3

NH3

PH3

An aqueous solution of ethanol is water has vaporu pressure.

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Equal to the of water

Equal to that of ethanol

More than that of H2O

Less than that of water

Which one of the following elements exhibits s-inert pair effect.

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B

Al

Pb

Sc

The Milk of magnesia is used for the treatment of

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Basicity

Rancidity

Acidity

Jaundance

The brown gas formed, when metal reduce HNO₃

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NO

NO₂

N₂O₃

N₂O₅

Which acid is used in the manufacture of synthetic fiber

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Formic acid

Oxalic acid

Carbonic acid

Acetic acid

The number of peptide bonds in dipeptide is

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0

1

2

3

Fungicides are teh pesticides which

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Control the growth of fungus

Kill insects

Kill plant

Kill herbs

Which is insoluble in water.

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BeSO4

MgSO4

CaSO4

BaSO4

First organic compound prepared in laboratory was.

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Glucose

Methane

Urea

Alcohol

Which one of the following plastic is a thermosetting plastic.

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PVC

Polystyrene

Polyethene

Bakelite

In a period, from left to right in the periodic table, the size of atom generally.

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Increases

decreases

Remains constant

First increase upto the middle of period and then decreases

Alcohol obtained by fermentation is only upto

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10%

12%

20%

95%