Question # 1

Which responds to +ve iodoform test?

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Butanol-1

Butan-1-al

Butanol-2

2-pentanone

Which of the following has zero depole-moment?

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CIF

PCl₃

SiF₄

CFCl₄

An ionic compound A+B is most likely to be formed when

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The ionization energy of A is high and electron affinity of B is low.

The ionization energy of A is low and electron affinity of B is high.

Both ionization energy of A and electron affinity of B are high.

Both ionization energy of A and electron affinity of B are low.

I-Chloropropane has two isomers, it is an example of

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Chain isomerism

Position isomerism

Functional group isomerism

Metamerism

The chemical formula of magnesite is

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MgCl₂

Mg(HCO₃)₂

MgCO₃

None of these

Chile saltpetre has the chemical formula

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NaNO₃

KNO₃

Na₂B₄O₇

Na₂CO₃H₂O

The hydrocarbon used for polymerization is

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Alkanes

Alkenes

Alkynes

All of above

The empirical formula of benzene is determined by

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IR spectra

U.V

Elemental analysis

NMR spectra

Eletronegativity difference in C-C bond in alkanes is:

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Zero

Double

Half

4.0

Type of isomerism in BrCH=CHBr is:

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Structural isomerism

Conformational isomerism

Geometrical isomerism

Positional isomerism

Which one of the following substances is a synthetic polyester

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Cotton

Nylon

Rayon

Terylene

Benzene can be obtained by heating either benzoic acid with X or phenol with Y. X and Y are respectively

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Zinc dust and soda lime

Soda time and zinc dust

Zinc dust and sodium hydroxide

Soda lime and copper

Alkali metals react violently with halogens to form

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Hydrides

Halides

Anyhydrides

None of these

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.

Heating a mixture of sodium benzoate and soda lime gives

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Methane

Benzene

Sodium bezoate

Calcium benzoate

How many alcohol (including both structural isomers and stereoisomers) can have the molecular formula C₄H₁₀O

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3

4

5

6

During the formation of a chemical bond the potential energy of the system

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Decreases

Increases

Does not change

None of these

Which one does not declourized KMnO₄

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Alkenes

Alkynes

Bezene

All above

Which has maximum protein content?

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Ground nut

Cow milk

Egg

Wheat

Which of the following has highest dipole moment?

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NH₃

PH₃

AsH₃

SbH₃

Which of the following statement is correct for a chemical reaction to occur molecules of substances must

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Collide with each other

Collide with energy more than activation energy

Collide with energy less than activation energy

Collide with high frequency

One of the following bonds is polar but compound is non-polar

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H₂O

NH₃

HCl

CO₂

According to the periodic law, the chemical properties of the elements are periodic functions of their

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Density

Atomic number

Atomic mass

Mass number

The reaction between fat and NaOH is called:

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Esterification

Hydrogenolysis

Fermentation

Sponification

Transition elements differ from s and p block elements due to their characteristic properties. What is not he characteristic property of transition elements

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Transition elements show variable oxidation states

Their salts are coloured

They can be used as catalyst

All of them are metals

Which of the following is not a colligative property?

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Depression in freezing point

Elevation of boiling point

Osmotic pressure

Modification of refractive index

Which is not a calcareous material

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Lime

Clay

Marble

Marine shell

A carbon atom carrying a postitive charge and attached to three other atoms of groups is called

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Caronium ion

Carbanion

Oconium ion

Carba ion

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The ionization energy of A is high and electron affinity of B is low

The ionization energy of A is low and electron affinity of B is high

Both the ionization energy of A and electron off affinity of B are high

Both the ionization energy of A and electron affinity of B are low

The rate of reaction :

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Increase as the reaction proceeds.

Decreases as the reaction proceeds.

Remains the same as the reaction proceed.

May decrease or increase as the reaction proceeds.

The ratio of the ionization energy of H and Be³⁺is

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1 : 1

1 : 3

1 : 9

1 : 16

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