Question # 1

Which one of the following is heterogeneous mixture?

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milk

ink

milk of magnesia

sugar solution

Industrial chemistry deals with the manufacturing of compounds:

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in the laboratory

on micro scale

on commercial scale

on economic scale

By electrolytic refining of copper , it is ____________ % pure.

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98

99

99.99

100

The period of Alchemists extends from _________ AD.

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800 to 1800

600 to 1600

900 to 1900

700 to 1700

According to Bohr, electrons can revolve only in this orbits whose angular momentum is

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h/2π

n 2h/π

n h2/2π

n h/2π

The study of hydrocarbons and their derived compounds is called

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Physical chemistry

Inorganic chemistry

Organic chemistry

Biochemistry

4^th and 5^th period of the long form of periodic table are called

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short periods

Normal periods

Long periods

Very long periods

Transfer of electrons between atoms results in:

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metallic bonding

ionic bonding

covalent bonding

coordinate covalent bonding

"Atoms" means _________

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Divisible

Indivisible

Break

Nil

The mathematical formula of Boyle's law is:

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PV = k

PT = k

V = kT

T = Vk

Metals are ________________

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Liquid

Solid

Gas

Malleable

Vibrious cholera causes.

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Choleera

Dysentery

Fluorsis

Hepatitis

When acid react with carbonates and bicarbonates which gas is evolved?

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H2

CO₂

Cl₂

N₂

Who put forward '' the vital force theory''?

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Kolbe

Wohler

Berzellius

Jabir - Bin - Hayan

In solvay's process slaked lime is used to:

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Prepare CO₂

Prepare quick lime

Recover ammonia

Form Na₂CO₃

Conversion of wood into coal is called.

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Carbonization

Destructive distillation

Fractional distillation

All

Which one gas is liberated when alkalies react with ammonium salts?

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O₂

CO₂

H₂

NH3

Acids turn

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Blue litmus red

Red litmus blue

Blue litmus green

Blue litmus blue

Hypoglycemia result due to:

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high cholesterol level

low cholesterol level

low sugar level in body

high sugar level in body

Alkanes give reaction only

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Addition

Decomposition

Substitution

Displacement

Sodium carbonate is manufactured by.

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Haber's process

Ostwald's process

Solvay's process

All

When CO₂ is passed through the ammonical brine the only salt that precipitates is:

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NaHCO₃

NH₄HCO₃

Na₂CO₃

(NH₄)₂CO₃

Which one of the following substances is used as water absorber in combustion analysis.

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Mg(CIO4)2

50% KOH

Lime water

Dilute solution of NaOH

For a gas obeying Boyle's law if pressure is doubled, the volume becomes.

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Double

One half

Four times

Remains constant

Fuel cells are the means by which chemical energy may be converted into

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Heat energy

Magnetic energy

Sound energy

Electric energy

In which system all the three axes are of equal length and all angles are at right angle.

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Cubic

Tetragonal

Orthorhombic

Hexagonal

The deviation of a gas from ideal behavior is maximum at.

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-10 ^oC and 5.0 atm

-10^oC and 2 atm

0^oC and 2 atm

100^oC and 2 atm

At constant volume of a system remains constant and the heat is absorbed by the system, them amount of heat absorbed is called

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Enthaply change of the system

Internal energy change of the system

Total enthalphy of the system

Total internal energy of the system

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dm⁺⁶mole^-2

mole²dm^-6

Mole dm^-3

Having no units

In zero order reaction, the rate is independent of

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Temperature of reaction

Concentration of reactants

Concentration of products

None of these

the number of Al³⁺ ion sin AlCl₃is 2.007 x 10²³. The number of Cl- ions are.

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6.02 x 10²³

3.01 x 10²³

1.5 x 10²³

The rate of reaction determined at any given time is called.

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Average rate

Instantaneous rate

Spontaneous rate

Over all rate

The sum of mole percent of all the components of solution is always equal to.

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Unity

100

Less than one

Less than 100

SN2 reactions can be best carried out with

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Primary alkyl halides

Secondary alkyl halides

Tertiary alkyl halides

All the three

Co-ordination number of Pt in Pt Cl(NO₂)(NH₃)₄

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2-

4

1

6

In which compound, the oxidation state of boron in not +3

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H2BO3

Ca2B2O11

Na2B4O7

Mg3B2

The reaction of alkyl halides with sodium metal in the presence of ether to from alkane is known as.

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Wortz reaction

Frankland reaction

Sabatier sendron

Kolbe's synthesis

Peroxyacetyl nitrate (PAN) is a irritant to human beings and it affects

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Eyes

Ears

Stomach

Nose

Which one of the following is the macronutrient for plants.

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Boron

Zinc

Calcium

Nitrogen

The word paper is derived from the name of which reedy plant

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Rose

Sun flower

Papyrus

Water

Which one of the following proteins transports oxygen in blood stream.

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Insulin

Albumin

Hemoglobin

Globulin

Ionization energy of calcium is.

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Lower than that of barium

Lower than that of magnesium

Higher than that of beryllium

Lower than that of strontium

A cyanohydrin is formed by the reaction of

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Alcohol and HCN

Ketone and NH3

Aldehyde and NH2OH

Aldehyde and HCN

The total number of transition element is

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10

14

40

58