Question # 1

Synthetic rubber is made by polymerization of

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Vinylaecetate

Acetylene

Divinylacetylene

Chloroprene

Which of the following is an ester.

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Soap

Starch

PVC

Dacron

The crystals of caustic soda, NaOH, are hygroscopic when these crystals are exposed to air.

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Gain water and remains solid

Gain water and becomes liquid

Lose mass and remain solid

Remain unchanged on heating.

The element which is present in earth crust about 50% is

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Oxygen

sulphur

Carbon

Nitrogen

Which set of Hybrid orbital has planner triangular shape

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sp

sp²

dsp²

sp³

The ore CaSO4.2H2O has the general name.

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Gypsum

dolomite

Calcite

Epsom salt

The diameter of rotary kiln in the manufacture of Portland cement is.

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1 to 2 feet

2 to 4 feet

4 to 8 feet

8 to 15 feet

Flavour of ethyl butyrate is

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Orange

Pine apple

Banana

Apricot

Which is not a calcarious material.

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Lime

Clay

Marble

Marine shell

Which one of the following proteins transports oxygen in blood stream.

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Insulin

Albumin

Hemoglobin

Globulin

Tincal is a mineral of

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Al

C

Si

B

The most metallic elements from the following is

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Arsenic

Oxygen

Antimony

Bismuth

Which element does not have allotropic form

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Nitrogen

Phosphorous

Arsenic

Antimony

Which form interstitial compounds.

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Fe

Ni

CO

All of those

According to Lewis concept, ethers behave as

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Acid

Base

Nucleophile

Solvent

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

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Ethanol

Ethene

Ethanol

Di ethyl ether

Which one of the following is inorganic fertilizer.

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Manure

Urea

Ammonium nitrate

All of these

Which acid is used in the manufacture of synthetic fiber

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Formic acid

Oxalic acid

Carbonic acid

Acetic acid

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