Question # 1

A compound is soluble in conc. H₂SO₄, it does not decolourise bromine in carbon tetrachloride but is oxidized by chromic anhydride in aqueous sulphuric acid within two seconds, turning orange solution to blue, green and then opaque. The original compound is

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Primary alcohol

Tertiary alcohol

alkene

ether

Basicity of orthoposphoric acid is

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2

3

4

5

Minamata disease is due to pollution of

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Organic waste into drinking water

Oil spill in water

Industrial waste containing mercury into fishing water

Arsenic into the atmosphere

E₁mechanism is generally shown by

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1° - RX

2° - RX

3° - RX

None of these

Solutions containing relatively lower concentrations of solute are called :

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Concentrated solutions.

Lighter solutions.

Dilute solutions.

None of above.

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Zero

253 sec

150 sec

500 sec

Carboxylic acids on complete reduction in the presence of HI and red Phosphours gives:

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esters

alcohols

alkanes

aldehydes

The stroids of fungi and yeast and yeast are called:

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Vitamin D

Vitamin D₂

Ergostrol

Cholestrol

The formula of ketone is

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None of these

The percentage of carbon in different types of iron products is in the order of:

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Cast iron > wrought iron > steel

wrought iron > steel > cast rion

Cast iron > steel > wrought iron

Cast iron = steel > wrought iron

In an ooctahedral crystal field splitting, the number of orbitals pushed down in energy is

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3

2

5

Zero

The value of SHE is cathode and anode is always taken to be

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One

Zero

Different

Same

Which one of the following compounds does not have the empirical formula CH₂O?

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Ethanoic acid, CH₃CO₂H

Ethanol, CH₃CH₂OH

Glucose, C₆H₁₂O₆

Methanal, HCHO

Which period starts from ₁₁Sc to ₃₀Zn ?

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First Period

Second Period

Third Period

4th Period

Alcohols are derivatives of:

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Alkanes

Alkens

Alkynes

Benzene

Diethyl ether is obtained by Williamsons synthesis using

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Ethanol + Na + C₂H₅Br

Ethanol + Mg + C₂H₅Br

Methanol + Na + CH₃Br

Methanol + Mg + CH₃Br

What is going to replace the petroleum?

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Silica

Silicates

Silicones

Silicon

A pair of elements in the same family in the periodic classification is

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Cl and C

Ca and Al

N and Ne

Na and K

Which one of the following has highest density

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Zn

Os

Ni

Cu

Ascorbic acid is a chemical name of

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Vitamin D

Vitamin A

Vitamin C

Vitamin B₆

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

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154 pm

133 pm

120 pm

150 pm

The active part in a molecule is called

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Homologous series

Functional group

Chemical bonding

Ionic complex

Na₂O is

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Acidic

Basic

Neutral

Amphoteric

Which bond is most stable

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C - Cl

C - F

C - Br

C - I

Commercial common salt becomes slight damp on storing because

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Common salt is hygroscope

Common salt contains some impurity, which is hygroscopic

Salt in efflorescent

Salt is crystalline

The gasoline with high octane No. has ______

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More knocking

Less knocking

No knocking

Only knocking

17.1 grams sucrose (C₁₂H₂₂O₁₁) dissolved in 250 cm³of solution. This has molarity

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0.1 M

0.2 M

0.01 M

0.02 M

The mass of the neutron is of the order of

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10^-23kg

10^-24kg

10^-26kg

10^-27kg

Tollen's reagent is

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Ammonical cuprous chloride

Ammonical cuprous oxide

Ammonical silver bromide

Ammonical silver nitrate

The total number of d-bock transition element is

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10

14

40

30

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