Question # 1

A nuclophile must

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Be an atom

A group of atoms

Have a lone pair

Be negatively charged

The symbol of the element whose atoms have the outer most electronic configuration 2s²2p³is

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N

Li

P

Na

Every sample of matter with uniform properties and a fixed composition is called a :

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Solid

Liquid.

Phase.

Gas.

Which of the following solution has the highest boiling point

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5.85% solution of sodium chloride

18.0% solution of glucose

6.0% solution of urea

All have the same boiling point

Which one of the following does not belong to alkaline earth metals

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Be

Ra

Ba

Rn

Which of the following may affect the rate constant (k) fro a reaction :

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Change in concentration.

Change in pressure.

Change in pH.

Change in temperature.

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2

3

4

9

Silicon atom is hybridized:

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sp

sp²

sp³

dsp²

The development of disagreeable odur in fats or oil is called

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Fragrance

Perfume

Rancidity

Smell

Heaviest particle is

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Meson

Neutron

Proton

Electron

The heat of formation of graphite and P(white) is ______ KJ/mole

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0.00

-273.0

+8.7

813.99

The period table contains elements in vertical column. these vertical column are called

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Groups

Periods

Blocks

Sub group

Most common oxidation states shownby cerium are

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+2, +4

+3, +4

+3, +5

+2, +3

Which gasoline is better?

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Of low boiling point

Of low molecular mass

Of high octane

All of these

Common names of carboxylic acids are given by then:

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Source

Person discovered

place

habit

A colourless liquid, at room temperature reacts with soda lime to form sodium salt of carboxylic acid and ammonia gas. The liquids is

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Propanamide

Propanoic acid

Formamide

Methyl Ethanoate

A polymeric substance that is formed in the liquid state and then hardened to a rigid solid is called a:

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Fiber

Plastic

Vanish

Polyamide resin

The element with highest electron affinity among the halogen is

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F

Cl

Br

I

Which of the following metals is sometimes found in native state in nature?

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Al

Cu

Fe

Mg

The change in concentration of reactant or product per unit time is called :

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Rate constant.

Rate of reaction.

Rate equation.

Rate law.

Maximum variable oxidation state is of:

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Mn⁺²

Fe⁺³

Cr⁺¹

a and b

Neutrons was discovered by

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Mosely

Milliken

Chadwick

Ruherford

Alcohals can be distinguished using test:

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Lucas

Tollen's

Koib's

William's

Which of the following element is most reactive

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Li

Na

K

Cs

When aqueous solution of NaOH is electrolysed useing graphite electrodes, the product obtained at anode is

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O₂gas

H₂gas

Na metal

Na₂O

Which of the following solutions has the highest boiling point ?

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5.85% solution of sodium chloride.

18.0% solution of glucose.

6.0% solution of urea.

All have same boiling points.

Which one of the following will have the maximum dipole moment

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CH₃F

CH₃Cl

CH₃Br

CH₃l

The theory of chemical bonding has been a major problem of:

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Modern Physics.

Modern Chemistry.

Modern Biology.

Mechanics.

Carboxylic acids functional group is:

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----COOH

-----COH

----CO---

----OH

The driving force for making a bond is

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To attain noble gas electronic configuration

To make soled compounds

To make different compounds

To make gaseous substances

The number of atoms present in molecule determines its:

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Molecularity

Atomicity

Basicity

Acidity

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