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TS Polycet (Polytechnic) 2019 Previous Question Paper with Answers And Model Papers With Complete Analysis

111) Froth floatation method is used for

A) Reduction of metal oxide

B) Concentration of ore

C) Extraction of metal

D) Purification of metal

View Answer

B) Concentration of ore

112) Aluminum is extracted from which of the following ores?

A) Hematite

B) Bauxite

C) Cinnabar

D) Limestone

View Answer

B) Bauxite

113) Which of the following methods is used for the purification of metal?

A) Magnetic separation

B) Roasting

C) Calcination

D) Poling

View Answer

D) Poling

114) Number of unhybridized p orbitals around each carbon in C₂H₄ molecule is

A) 0

B) 1

C) 2

D) 3

View Answer

B) 1

115) The product formed in the reaction of carboxylic acid and an alcohol in the presence of cone. H₂SO₄ is an

A) Aldehyde

B) Ether

C) Alcohol

D) Ester

View Answer

D) Ester

116) The formula of Chloroform is

A) CH₃Cl

B) CH₂Cl₂

C) CHCl₃

D) CCl₄

View Answer

C) CHCl₃

117) Which of the following is a Saturate Hydrocarbon?

A) Cyclopropene

B) Propene

C) Propyne

D) Propane

View Answer

D) Propane

118) The alkane which can show isomerism is

A) Butane

B) Ethane

C) Methane

D) Propane

View Answer

A) Butane

119) The process of conversion of starches and sugars to Ethyl alcohol is called as

A) Esterification

B) Saponification

C) Dehydration

D) Fermentation

View Answer

D) Fermentation

120) Which of the following is not a conductor of electricity?

A) Nanotubes

B) Graphene

C) Diamond

D) Graphite

View Answer

C) Diamond

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