Question # 1

Which are used as essences (flowers)?

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Aldehydes

Ketones

Alcohols

Esters

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Plank's equations

de Broglie's equations

Heisenburg's equation

None

Keeping in view the size of atoms, which order is the correct one

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Mg > Sr

Ba > Mg

Lu > Ce

Cl > l

The atomic radius of hydrogen is 37

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Pecometer

Manometer

Angstrom

Micrometer

Who rejected the vital force theory

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Wholer

Fisher

Newton

Lewis

Selection of filter paper depends upon sizes of particles to be:

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Tested

^Filtered

Checked

All of above

When hydrogen cyanide is added to an Aldehyde in the presence of ammonia it is called

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Strecker synthesis

Cory house synthesis

Williamson;s synthesis

None of these

For a 3P subshell the set of principle and azimuthal quantum number is

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n = 1 , l = 2

n = 3, l = 0

n = 3, l = 1

n = 1, l = 3

The electronegativity of elements in a period from left to right

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Decreases

Increases

First decreases then increases

First increases then decreases

Which bond shows maximum hydrogen bonding with water?

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CH₃OH

C₂H₅OH

CH₃----O----CH₃

C₆H₅OH

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

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AlCl₃

HNO₃

BeCl₂

NaCl

Which compound contains - OH in their molecule

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Alcohol

Phenol

Alcohol and phenol

Ether

Hydrolysis of alkyl nitriles is done to get carboxylic acids in the presence of

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Mineral acids

Mineral alkalies

Organics acids

Minerals acids & alkalies

An ionic compound M₂S₃is formed by the metal M,, the metal is

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Ca

Ba

K

Al

A compound contains one atom of oxygen and % of O 34.78, then molecular mass of compound is

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46

78

110

180

Where lime is not used

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In refining or metals

In paper industry

In glass industry

In the preparation of NaOH

Metal tend to lose electrons, becoming:

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Metals

Positively charged

Negatively charged

(a)And (c)

Electrolytes in the form of solution or in the fused state have the ability to conduct :

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Light.

Electricity.

Ions.

Electrons.

For the representative elements from left to right across a period in the periodic table, the electron effinity of the atom generally

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Increases

Remains constant

Decreases

Not clear

The quantitative relationship between the substances according to balanced equation describes

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Reversible reactions

Stoichiometry

Limiting reacting

Percentage composition

Metallic conduction is also called as :

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Ionic conduction.

Protonic conduction.

Electronic conduction

Super conduction

Reduction with aluminium isopropoxide in excess of Isopropyl alcohol is called Meerwein Ponndroff-Verley reduction (MPV). What will be the final product when cyclohex-2-enone is selectively reduces in MPV reaction?

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Cyclohexanol

Cyclohex-2-enol

Cyclohexanone

Benzene

A fuel has the same knocking property as a mixture of 70 isooctane (2, 2, 4- trimethyl pentane) and 30% n-heptane by volume the octane number of the fuel is

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100

70

50

40

Quantity of heat evolved or absorbed during the reaction is measured according to the equation

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The shape of gaseous SnCl₂is

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Tetrahedral

Linear

Angular

T-shaped

The active part in a molecule is called

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Homologous series

Functional group

Chemical bonding

Ionic complex

The chemical formula of gypsum is

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CaSO₄. 5H₂O

CaSO₄. 4H₂O

CaSO₄. 2H₂O

None of these

Benzene does not undergo polymerization and it is also resistant to

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Reduction

Oxidation

Alkylation

Ozonolysis

The number of elements in the 4th periods of periodic table is

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8

10

18

32

Coinage metals like Au, Pt, Ag and Cu are the least reactive metals and don't liberate H₂gas when treated with acids because

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These have very high positive values of reduction potentials

These have very high negative values of reduction potentials

Their ionization potentials are lowest

Their reduction potentials are close to SHE

The common name of propanoic acid is

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Acetic acid

Formic acid

Propionic acid

Butyric acid

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