Question # 1

Temperature required for the dehydration of ethanol into ethene in the presence of HaSOu is

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130°C

170°C

175°C

180°C

A real gas most closely approaches the behaviour of an ideal gas at

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15 atm. and 200 K

1 atm. and 273 K

0.5 atm.and 500 K

15 tm, and 500 K

Elements having high ionization potential values are

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metals

non- metal

liquids

solid

At which oxidation state Cu achieves electronic configuration of Zn+2

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0

+2

+1

+3

Starch gives ________ color with iodine:

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blue

red

yellow

green

The lattice energy of NaCl is

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787 j/ mole

790 kj/mol

780 kJ/ mol

-787 kI / mole

NaOH+HCI- NaCI+ H2O. Enthalpy change in the above reaction is called

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Enthalpy of reaction

Enthalpy of Neutralisation

Enthalpy of formation

Enthalpy of combustion

The standard electrode potential of hydrogen is arbitrarily taken at 298k is

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1.00volt

0.10 volt

0.00 volt

10.0 volt

Nitro alkanes exhibit the:

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Chain isomerism

Positional isomerism

Functional group

Metamerism

Evaporation causes

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High temperature

High pressure

Cooling

Vapour

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

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12

8

6

10

The number of electron pairs shared in carbon tetrachloride molecule is

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2

3

4

1

The spectrum of He is expected to be similar to that of

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H

Na

He⁺

Li⁺

Acetamides are formed by the reaction of carboxylic acids with

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Acids

Bases

Salts

NH₃

Which one of the following is not an alkali metal

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Francium

Caesium

Rubidium

Radium

For every reaction occurring in the body three is at least one type of

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Enzyme

Vitamin

Protein

Amino acid

The valence shell electronic structure of an element is ns²np⁵. The element will along to the group of

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Alkali metals

Inert metals

Noble gases

Halogen

How many g of dibasic acid (mol. wt. 200) should be present in 100 ml of the aqueous solution to give 0.1 Normality?

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1 g

2 g

10 g

20 g

Which of the following groups will increase the acidity of phenol?

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-NO₂

-CN

-X (halogens)

All

Toluene can be oxidized to benzoic acid by

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KMnO₄(alk)

K₂Cr₂O₇(acidic)

Both

None

Metallic conduction is due to the

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Movement of electrons

Movement of ions

Both a and b

None of these

Sodium metal is obtained by the electrolysis of fused NaCl in cell is called

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Nelson's cell

Down's cell

Daniell cell

Voltaic cell

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