Question # 1

Charle's law only obeys when temperature takes in ______ scale

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Celsius

Fahrenheit

Kelvin

Rickey

This is known fact that the molar volumes of different gases at S.T.P. are

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much larger than the molar volumes of liquids and solids

little bit less than the molar volumes of solids

about the same as the molar volumes of liquids

little bit greeter than the molar volumes of liquids

Fungicides re the pesticides which:

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kill plants

kill herbs

kill insects

control the growth of fungus

During incineration temperature range of non-rotating chamber is

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900-1000C°

650-1100C°

950-1300C°

700-900C°

In esterification, the OH of carboxylic acid is replaced by

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OR+

R+

OR

R

Which class of compound cannot show positional isomerism?

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Alkanes

Alkene

Alkynes

Alcohol

What is the co-ordination number of face centered cubic structure?

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12

8

6

10

Which of the following statements about amorphous solids is incorrect?

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They melt over a range of temperature

They are anisotropic

There is no orderly arrangement of particles

They are rigid and icompressible

One of the best applications of Hess's law to calculate the lattice energy of ionic compound is

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Measurement of enthalpy change in a calorimeter

Studying of first law of thermodynamics

Measurement of a heat of formation of a compound

Born-Haber cycle

[Ti (H20)6]3+ ion isin colour.

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Yellow

Blue

Violet

Red

Which one of the following is a disaccharide?

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glucose

sucrose

fructose

starch

Fossil fuels consist of :

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Coal

Natural gas

Petroleum

All of these

A colloidal gel is:

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3Ca, Al₂O₃

CaSO_2.2H₂O

3CaAl₂O₃.3CaSO₄.2H₂O

3Ca.Al₂O₃.6H₂O

The filtration process is used to to separate solid from :

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Liquid.

Gas.

Solid.

All of above.

A chemical reaction A---------->B is said to be in equilibrium when :

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Rate of transformation of A to B is equal to B to A.

50% reactant has been changed to B.

Conversion of A to B is 50% complete

Complete conversion of A to B has taken place.

At certain temperature, 50% of HI is dissociated into H₂and I₂the equilibrium constant is

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1.0

3.0

0.5

0.25

The pH of 10^-3mole dm^-3of an aqueous solution of H₂SO₄is

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3.0

2.7

2.0

1.5

Corrosion may be prevented by

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Allcying

Paints

Metallic coatings

All

The tip of the funnel should touch the side of the beaker in order to avoid :

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Splashing.

Leakage.

Mixing.

Contamination.

Which of the following acid can be used as a catalyst in Friedal Craft's reactions

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AlCl₃

HNO₃

BeCl₂

NaCl

Chromic acid used to oxidize

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Aldehyde

Ketone

Both a and b

None of these

The equivalent weight of KMnO₄(formula weight = M) when it is used as an oxidant in neutral medium is

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M

M/2

M/3

M/5

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