Question # 1

Esterification of CH3COOH isreaction

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Acid base

Electrophilic

Redox

Nucleophilic

The basic distinction between solids, liquids and gases lies in difference between.

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Strength of the bonds

Size of molecules

space which the molecules occupy

All of above

Asbestos is commonly used in making

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wall board

black board

soft board

hard board

The compound used to distinguish the ethyne and ethene is

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Alkaline KMnO4

Ammonical AgNO3

Bromine water

Tollen's Reagent

An element from the given below exists as discrete small molecules in the solid state. Which is that?

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Sodium

Silicon

lodine

lron

Which of the following reagents reaet in same manner with HCHO, CH3CHO andCH3COCH3

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HCN

Cu2(OH)2/ NaOH

Ammonical AgNO3

Cu(OH)2 only

Which of the following element has high m.p and b.p, it acts as a reducing agent, and can react with bases?

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Sr

Ca

Be

Mg

Neutralization of acid-base is

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Spontaneous

Exothermic

Non spontaneous

Both "a" and "c

Air can be distilled fractionally because the constiltuents of the air:

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have different densities

can be liquefied

are gases at room temperature

have different boiling points

The system in which all the three axes are unequal and are at righ angle to each other is called

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cubic

hexagonal

orthorhombic

tetragonal

Lind's ,method for liquefaction of gases is based on the principle of:

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Graham's law of diffusion

Joule Thomson effect

Avogadro's hypothesis

Dalton's law of partial pressure

The change in enthalpy when one mole of a substance is dissolved in a specified quantity of solvent at a given temperature is called

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Heat of reaction

Heat of solvation

Heat of combustion

Heat of solvent

The vapour density of a gas is 11.2.The volume occupied by 11.2 g of this gas at N.T.P is

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22.4 litres

11.2 litres

1 litre

2.24 litres

Hydrogen bonding is extensively present in proteins which form the spiral. The hydrogen bond being produced is between

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nitrogen and hydrogen atom

oxygen and hydrogen atom

carbon and hydrogen atom

oxygen and carbon atom

Enthalpy of formation of one mole of ionic compound form gaseous ion under standard condition is called

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Gibb's energy

Bond energy

Lattice energy

Water may boil at 120 °C when external pressure is:

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100 mm of Hg

700 mm of Hg

760 mm of Hg

1489 mm of Hg

In which of the following types of reactions are the carbonyl compounds and alkene are similar in behaviour

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Nucleophilic addition

Electrophilic addition

Nucleophilic suhstitution

Catalytic hydrogenation

The enthalpies of all elements in their standard states are

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Unity

always +ve

always -ve

zero

Highest oxidation state af the transition elements is

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+8

+7

+5

+1

R = 0.08205:

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atm dm³mol^-1k^-1

J mole^-1k^-1

Nm mol^-1k^-1

cal. mol^-1k^-1

According to kinetic theory of gases kinetic energy depends on

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Temperature

Collision

Pressure

Atomic number

What is the weight of 10 dm³of CO₂at 27°C and 2 atm?

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89.3 g

56.1 g

125 g

127 g

In a cubic lattice a unit cell is shard equally by how many unit cells?

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4

2

6

8

How many kinds of space lattices are possible in a crystal?

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23

7

230

14

According to Boyles law, at constant temperature the product of pressure and volume of a given mass of gas is

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whole number

a constant

fraction

a multiple

Which of the following compound is least reactive

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HCHO

CH3CHO

CH3COCH3

C6H5CHO

Styrene has empirical formula CH, and there is 92.2%C and 7.75% hydrogen. If molar mass is 104g mol¯, what will be integral multiple (n) to get molecular formula:

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2

4

6

8

Which of the following is the unit for pressure of a gas in system international

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Nm^-2

mm of Hg

atmosphere

torrr

One Pascal is equal to

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1 Nm^-2

1 Nm

1 Nm^-1

1 Nm²

Elements of II-A group are called alkaline earth metals due to the reason that

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they occur in earth only

they form divalent cations only

they have ns2 electronic configuration

their oxides and hydroxides are alkaline in nature and metals are present in earth crust

When the temperature is raised, the viscosity of the liquid decreases.This is because of

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Decreased volume of the solution

Increase in temperature increases the average kinetic energy of molecules which overcome the attractive force between them

Decreased covalent and hydrogen bond forces

Increased attraction between the moelcules

Gas is enclosed in a container of 20cm3 with the moving piston. According to kinetic theory of gases, what is the effect on freely moving molecules of the gas if temperature is increased from 20°C to 100C.

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Colliding capability of molecule will become lower

Pressure will become one half

Temperature has no effect on freely moving molecules

Volume will be increased

Which is correct?

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1 mm Hg = 1 torr = 1 atm

1 mm Hg = 760 torr = 1 atm

760 mm Hg = 760 torr = 1 atm

760 mm Hg = 1 torr = 1 atm

Crystals can be classified into

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7 crystal systems

4 crystal systems

3 crystal systems

14 crystal systems

The pressure exerted by gas molecules is due to their

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collisions

densities

masses

kinetic energy

Equal masses of methane and oxygen are mixed in an empty container at 25°C The fraction of total pressure exerted by oxygen is

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1/3

1/9

8/9

16/17

The structure of sodium chloride is

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simple cube

body centered cubic

face centered cubic

depends upon conditions

The highest oxidation state of manganese is

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+7

-7

+6

+4

Which thermometer will have its reading 273 degrees greater than that of thermometer C?

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A

B

B has 273 degrees greater than A

C has greater reading than all other thermometers

Lattice energy is also termed as

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ionization

crystal energy

dissociation

bond energy

Which is the least reactive of all the alkali metals

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Li

Na

K

Cs

Polarity of a molecule is expressed in terms of

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Bond strength

Dipole moment

Bond length

Shape

The pressure of 5dm³gas increase from 250 torr to 500 torr then new volume of gas

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500 cm³

375 cm³

2500 cm³

None of these

According to charles law there will be a change in the volume of a given mass of a gas by 1/273 of its original volume at 0°C if the temperature of the gas is changed by

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10°

1°C

100°C

2°C

The deviation of a real gas from ideal behaviour is maximum at

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-10.0°C and 50 atm

-10°C and 2 atm

100°C and 2.0 atm

0°C and 2 atm

When a metal rod is dipped in its one molar ionie solution

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Electricity is produced

Electricity is consumed

Redox reaction occurs

Potential difference is set up

One degree on Celsius scale is ______ time greater then Fahrenheit scale

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9/5

5/9

6/5

5/6

Phosphoprotein comes under the type of proteins

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Simple protein

Derived protein

Conjugated

Both A & B

Which of the following is a strong acid

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CH3COOH

C2H5OH

HCOOH

Phenol

When a compressed gas is allowed to pass through a nozzle of a jet into a region of low pressure, it produces

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cooling

vaporization

fusion

expansion

What is the formula of dolomite?

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CaMg3 (SiO3)4

MgCO3

MgCO3.CaCO3,

MgSO4

A state function which describes together the internal energy and product of pressure and volume is called

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Enthalpy

internal energy

Work

Kinetic energy

Ionic solids with defects,contain

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Equal number of cation and anion vacancies

Interstitial anions and anion vacanies

Cation vacancies only

Cation vacancies and interstitial cations

Equal volumes of ideal gases contain equal number of molecules at:

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Same temperature

Same pressure

Same environmental conditions

Both (A) and (B)

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

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-10∘C and 5.0 atm

-10∘C and 2.0 atm

100∘C and 2.0 atm

0∘C and 2.0 atm

Which one of the following equations represents the 1st ionization energy of Na?

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Na(s) ---->Na⁺ (g) + e^-

Na(g) --->Na⁺ (g) + e^-

Na(s) --->Na⁺ (s) + e^-

Na (s) + e^- ---> Na⁺ (g)

Which of the following reactants will be required to form ethene from ethyl chloride

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_{Alcoholic KOH}

Alkaline KMnO4

Aqucous KOH

Aqucous NaOH

The molecules of CO₂is dry ice form the

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ionic crystals

covalent crystals

molecular crystals

any type of crystal

Alcohols of low molecular weight are:

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Soluble in water

Insoluble in water

Soluble in water on heating

Insoluble in all solvents

What types of bonds are broken when water turns into steam on heating?

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covalent

permanent dipole interactions

hydrogen bonds

induced dipole interactions

NH₃shows a maximum boiling point among the hydrides of Vth group elements due to

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very small size of nitrogen

hydrogen bonding between its molecules

enhanced electronegative character of nitrogen

pyramidal structure of NH₃