Question # 1

The structure of Benzene is

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Hexagonal irregular

Tetrahedral

Trigonal planner

Hexagonal planner

The amount of free fatty acid in fats and oil is determined by

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Iodine number

Acid number

Saponification number

Gold number

Mark the incorrect statement

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Metallic character increase down the group

Metallic character increase from left to right along a period

Metallic character decrease from left to right along a period

Metallic character remains the same down the group

Which one of the following compounds is the isomer of ethyl alcohol.

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CH3OH

CH4OCH3

CH5-CH(OH)CH3

CH3OC2H5

Which of the following compounds is used to make spray, which has fungicidal action.

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BaSO4

Na2CO3

CaO

CaSO4.2H2O

Which is more basic

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RbOH

NaOH

KOH

Li OH

Which one of the following uses is not correctly related with the halogen.

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fluorine -------- Teflon

Chlorine ---------Bleaching powder

Bromine ---------------PVC plastics

Iodine -----------Iodex

In which country first of all paper was invented

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USA

China

Egypt

Germany

Which one of the following elements exhibits s-inert pair effect.

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B

Al

Pb

Sc

The pH of truly acidic rain is

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7-6.8

6.5-6

6-5.6

less than 5

Which is not an ore of iron

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haematite

Magnetite

limonite

Cassiterite

Effect of substituent on benzene ring is due to

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Resonance

Inductive effect

Both a and b

Neither a nor b

When ethyl bromide is heated with Ag2O the product formed is.

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Ethanol

Ethene

Ethanol

Di ethyl ether

Which alkyne reacts with water and form aldehyde

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Ethyne

Propyne

1- Butyne

2- Butyne

To prevent corrosion, Iron pipes carrying drinking water are covered with zinc by

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alley formation

Electroplating

Galvanizing

Soldering

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

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AlCl₃

HNO₃

BeCl₂

NaCl

Which element is present in chlorophyll

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Ca

Mg

K

Be

Which one of the following alcohols will be formed when ethyl magnesium bromide reacts with acetone.

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Primary alcohol

Secondary alcohol

Tertiary alcohol

Dehydrin alcohol

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