Question # 1

____________ of copper is done by electrolysis.

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Production

Refining

Both

Nil

The reaction of ionic compound is very ________________ in solution.

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Slow

Fast

Medium

Nil

The forces of attraction present between the molecules of a substance are called ____________ forces.

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Intermolecular forces

Covalent

Ionic

Nil

Th name of chemist who arranged all the elements in the periodic tale is :

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J.Newlands

Columb

Einstine

None of these

Which one is moderate reactive metal?

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Pb

Na

Ca

Mg

Bronze (alloy) is a ____________

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Slolution

Mixture

a & b

Nil

Which one of the following is an electron deficient molecule?

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HN₃

BF₃

N₂

O₂

P1V1 = P2V2 is mathematical form of ____________ law.

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Bohr's

Charles

Boyle's

Nil

Deuterium is used to make:

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light water

heavy water

soft water

hard water

Protons carry _________ charge.

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+

_

No

Neutral

Electron _____________ energy when thy jump from higher to lower level.

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Absorb

Radiate

Nothing

Nil

Which gas protects the Earth's surface from ultraviolet radiations?

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CO₂

CO

N₂

O₃

Citric acid is present in

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Citrus fruits

Sour milk

Rancid butter

Apple

Condensed formula of ethane is

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C₃Cl₈

C₂Cl₆

H₃CCH₃

None of these

The stratosphere layer is at height above the earth's surface.

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0-12 km

12-50 km

50-85 km

65-120 km

The rate of reverse reaction in the beginning.

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Slow

moderate

Very fast

Low

A salt is not composed of

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A metallic cation

Non -metallic anion

an anion of a base

An anion of an acid

Some orchids attracts bees for pollination by producing.

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alkanes

almenes

alkynes

all the above.

Fossil fuel means.

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Coal

Petroleum

Natural gas

All of them

What is the pOH of Ca(OH)2, 0.02 M Solution.

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1.698

1.397

12.31

12.61

Dextrose is a crystallized:

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sucrose

lactose

glucose

fructose

Which part of digestive system glucose absorb.

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Stomach

Liver

Small intestine

Large intestine.

What are the SI of excluded volume 'b' in Vander waal equation.

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dm³ mol -1

m3 mol -1

mol dm-3

mol m-3

If we want to change O₂to O₂^-1The electron is to be placed in

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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

Pressure remaining constant, at which temperature the volume of a gas will become twice of what it is at 0 ^oC

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546 ^oC

200 ^oC

546 K

273 K

Chromatography in which stationary phase is a solid is called.

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Partition chromatography

Paper chromatography

High pressure liquid chromatography

Adsorption chromatography

Which formula will be used to determine the number of in electrons sub shell of an atoms.

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2(l+1)

2(2l+1)

(l+1)

(2l+1)

Vapour pressure of liquid depends upon

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Amount of liquid

Surface area

Temperature

Size of container

A material or a collection of materials which is under study is called

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State function

Degree and joule

Degree and ergs

Calorie and joule

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

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Joule Cm^-3degree^-1

Joule deg^-1atm^-1

Joule deg^-1mol^-1

Joule deg^-1kg^-1

How many electrons can be accommodated in sub shell for which n = 3, l = 1

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6

8

18

32

The atomis radius is of the order of

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10^-8cm

10⁸cm

10^-12cm

10^-10cm

When methane reacts with Cl2 is commonly known as

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Mustard gas

Laughing gas

Phosgene gas

Bio gas

Lactose has same molecular formula as

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Glucose

Fructose

Ribose

Maltose

Nelson's cell is used to prepare

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NaOH

Na₂CO₃

Na metal

NaCl

The general representation for Grignard reagent is.

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RMgX

ReMgX

RXMg

RMgX2

Which one of the following elements commonly exhibits oxidation states of +6 and +3 in aqueous solution.

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Na

Cr

Mg

C

What products is formed when ethyl bromide reacts with magnesium to form Grignard's reagent.

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Pyridine

Anhydrous ether

Ethyl alcohol

Carbon tetrachloride

In which of following processes 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

The element cesium bears resemblance with

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Ca

Cr

Both of the above

None of the above

In primary alkyl halides, the halogen atom is attached to a carbon which is further attached to how many carbon atoms.

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One

Two

Three

Four

What is effect of solubility of carboxylic acid in water by increasing their molecular masses.

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Decreases

Increase

Remain constant

Non effected

Which of the following is non-typical transition element

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Cr

Mn

Zn

Fel