Question # 1

Which of the following ions does not have the electronic configuration same as that of neon.

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F-

O2-

Na+

Ca2+

The diameter of a bucky ball is about _____________

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o

1 A

1 nm

o

100 A

10 nm

An explosive

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Nitroglycerine

Trinitrotoluene

Fluorine perchlorate

All above

The number of bonds formed by the central atom is called its.

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Valence number

Complex number

Coordination number

Avogadro's number

Which of the following statement is not correct n respect of Arrhenius concept.

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The concept is applicable only for aqueous systems.

Neutralization takes place in aqueous mediam only

TH+ ion cannot remain as such in water

This concept is applicable for non aqueous system only.

Which of the following parameter is not involved in calculations based on Born Haber Cycle.

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Ionization enthalpy

Electron gain enthalpy

Electronegativity

Bond dissociation energy

In glass making the whole combination of ingredients is called a.

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Gangue

Batch

Mixture

None of these

The full form of STM is

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Scanning Tunneling Microscope

Scientific Technical Microscope

Systematic Technical Microscope

SuperTensile Microscope

2- Butanol is optically active because a contains

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An asymmetric carbon atom

A plane of symmetry

Centre of symmetry

A hydroxyl group

The size of iso electronic species - F- , Ne, and Na+ is affected by

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Nuclear charge (Z)

Valence principal quantum number (n)

Electron electron interaction in the outer orbital

None of the factors because their size to the same.

Elements in the same vertical group of the periodical have same

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Number of electron

Atomic number

Number of valence elections

Electronic configuration

What is caustic potash

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NaOH

KOH

NaCl

KCl

Which of the following quantity is correct for micro analysis.

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1 -10 mg or < 50 ml

10-20 mg or > 50 mL

50-100 mg or < 100 mL

None of above

An Ideal gas is one which obeys all the gas law at.

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Low pressure

High Pressure

Low and High temperature

All condition of pressure and temperate re

The energy gap between two bands so large that it effectively prevents the promotion of electron from the lower to the higher band such energy gap all called.

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Ionization zone

Dissociation zone

Distinction zone

Forbidden zone

Boric acid is added to glass because is.

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Makes the glass opalescent

Reduces the coefficient of expansion

Makes the glass brittle

Increase refractive index of the glass.

Which of the following is atmospheric pollutant.

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CO2

CO

O2

N2

Which of the following pair on aldol condensation followed by dehydration gives methyl vinyl ketone.

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HCHO and CH3COCH3

HCHO and CH3CHO

CH3CHO and CH3CHO

CH3COCH3 and CH3COCH3

If reaction A has an activation energy of 250 kj and reaction activation energy of 100 kj, which of the following statements must be correct.

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If reaction A is exothermic and reaction B is endothermic then reaction A is favored kinetically

At the same temperature the rate of reaction B is greater than the rate of reaction A

The energy of reaction A must be greater than the energy of reaction B.

The energy of reaction B must be greater than the energy of reaction A

Which of the following hydroxides has the maximum solubility in water.

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Mg (OH)2

Ca (OH)2

Sr (OH)2

Ba (OH)2

In the Friedel-Craft acylation, the amount of AlCl3 tha tmust be taken is

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In catalytic amount

One equivalent

More then one equivalent

Amount does not matter

Peppermint oil contains.

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Menthol

Thymol

a-pinene

Comphene

When a drop of detergent solution is added onto a clean towel. It spreads instead of existing as a droplet Which of the following statements explains this phenomenon.

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Detergent acts as an emulsifying agent

Detergent reduce surface tension of water

Detergent reduces surface tension of water

All of above

Which of the following is not obtained when Br2 is added to ethylene in the presence of aqueous NaCl solution.

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Br CH2CH2Br

Br CH2CH2Cl

ClCH2 CH2Cl

ClCH2CH2Cl

Which of the following is the strongest oxidant.

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F2

Cl2

br2

I2

Which of the following solids is a better conductor of electricity.

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Pore NaCl cyrstal

Diamond

Graphite

Marble pieces

Which of these historical works of art contain nanotechnology.

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Lycurgus cup

Medieval stained glass windows in churches

Damascus steel swords

All of the above

Which of the following statement is not correct with respect to harmful effects of ground water pollution.

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It causes lungs cancer

It causes jaundice

It damages crops

It helps to prevent epidermises

All the member of group III A are metals except.

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B

Ai

Ga

In

Group III A of the periodic table consist of elemetns.

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3

4

5

6

The second order rate constant can have units.

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dm-6 mol 2 s-1

dm3 mol s-1

dm³ mol^-1 s^-1

dm6 mol-1 s-1

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