Question # 1

Which of the following is less malleable?

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Sodium

Iron

Gold

Sliver

Solid particles possess which one of the following motions?

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rotational motions

vibrational motions

translation motions

both translational and vibrational motions

Group runs from ________________

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Top to bottom

Left to right

Top to right

Bottom to left

The formula of benzene is _________

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C6H6O3

C6H6

C12H22

Nil

Ionic compound are ________________ in water.

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insoluble

Soluble

Covalent

Solvent

Mass per unit volume is:

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Velocity

Dencity

Pressure

Nil

________________ are formed from chemical reactions.

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Elements

Mixture

Substance

Nil

In peroxides, the oxidation no. of O is

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+1

-1

+3

-3

The cathode of Daniel cell is made up of

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Zn

Cu

AI

C

Silver is a ____________ metal.

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Pure

Noble

None

All

Fog is an example of ____________ in gas.

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Solid

Liquid

Gas

Plasma

Ammonical brine is prepared by dissolving ammonia gas in.

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NaCl

CaCO₃

CaCl₂

Na₂SO₄

The reaction goes from left to right , if:

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Qc = Kc

Qc > kc

Qc<Kc

Qc = 0

The characteristics of reversible reactions are the following except:

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Products never recombine to form reactants.

They never complete

The proced in both ways

They have a double arrow between reactants and products.

Ozone is formed in:

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Troposphere

Stratosphere

Mesosphere

Thermosphere

Arrhenius presented his concept about acids and bases in.

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1785

1787

1923

1930

General formula of carbohydrate is.

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C_n(H₂O)₆

CH

C_nH_2n

C₆H_2nO

Compound of metal exist under earth crust are called.

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Ore

Gangue

Minral

None of these

Which of the following thing is a lewis base?

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NH₃

BF₃

H⁺

AlCl₃

Chemical formula of Stearic acid.

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C₁₅H₃₁COOH

C₁₇H₃₅COOH

C₁₅H₃₇COOH

None of them

Oils and fats are esters of large chain fatty acids with.

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Glycogen

Glucose

Starch

Glycerol

Temporary hardness of water is removed by adding.

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Ca(OH)₂

NaOH

KOH

CaSO₄

Which has greater reduction potential

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Na

H2

Zn

F2

Unit of mole fraction is

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mol dm-3

mol kg-1

g dm-3

No unit

The boiling point of pure water at 1 atm pressure is.

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98^oC

100^oC

69^oC

120^oC

In lead accumulator cathode is made up of.

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Pb

Pb coated with PbO2

PbSO4

Mixture of Pb and PbO2

In a period of periodic table, atomic radii

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Increases

Decreases

Remain same

First decreases than increases

Two solution of NaCI and KCI are prepared separately by dissolving same moles of them in the fixed amount of solvent. Which of the following statements is true for these solution

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KCI solution will have higher boiling point than NaCI solution

Both the solutions have different boiling point

KCI and NaCI solution possess same vapour pressure

KCI solution possesses lower freezing point than NaCI solution

The structure of water molecule is.

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angular

Linear

Trigonal

Trigonal pyramidal

Which electron traveled more distance, when jump from

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n1 to n2

n2 ato n3

n3 to n2

n3 to n4

Bohr's model of atom is contradicted by

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Planck quantum theory

Quartization of energy of electrons

Heisenberg's uncertainty principle

Quartization of angular members

The wave number of the light emitted by a certain source is 2 x 10⁶m^-1The wave length of this light is.

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500 nm

500 m

200 nm

600 m

Quantum number values for 3p orbitals are.

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n = 0, l = 3

n = 3 , l = 1

n = 2, l = 1

n = 2 , l = 3

The product of fermentation of sucrose is

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Ethanol and H2O

Ethanol and CO

Ethanol and CO2

Glucose and CO2

Which one of the following products will be formed in Wurtz reaction when sodium metal reacts with ethyl chloride in anhydrous ether.

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Methane

Ethane

Propane

Butane

Acetic acid is commercially prepared form

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Ethene

Ethane

Ethyne

Ethanol

Which is not a calcarious material

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Clay

Limestone

Marble

Chalk

The percentage of nitrogen in urea is.

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36%

46%

56%

65%

The smog which have high contents of SO2 in it, is called.

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Reducing smog

Oxidizing smog

Natural smog

Neutral smog

Chemical composition of colemanite is

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Ca₂B₆O₁₁. 5H₂O

CaB₄O₇. 4H₂O

Na₂B₄O₇.4H₂O

CaNaB₅O₉. 8H₂O

Which one of the following set of raw material is most suitable for manufacture of urea.

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CH4, N2 and CO2

H2, N2 and CO

H2,CO2 and H2O

H2O, N2 and H2

Formation of cyanohydrin from an aldehyde in an example of.

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Nucleophilic substitution

Nucleophilic addition

Electrophilic addition

Electrophilic substitution

Which amino acid is present in cheese

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Glycine

Alanine

Tyrosine

Valine

Aromatic hydro carbon are the derivatives of

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Normal series of paraffins

Alkene

Benzene

Cyclohexane