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

Q). 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

Q). Aluminum is extracted from which of the following ores?
A) Hematite
B) Bauxite
C) Cinnabar
D) Limestone

View Answer
B) Bauxite

Q). 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

Q). Number of unhybridized p orbitals around each carbon in C2H4 molecule is
A) 0
B) 1
C) 2
D) 3

View Answer
B) 1

Q). 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

Q). The formula of Chloroform is
A) CH3Cl
B) CH2Cl2
C) CHCl3
D) CCl4

View Answer
C) CHCl3

Q). Which of the following is a Saturate Hydrocarbon?
A) Cyclopropene
B) Propene
C) Propyne
D) Propane

View Answer
D) Propane

Q). The alkane which can show isomerism is
A) Butane
B) Ethane
C) Methane
D) Propane

View Answer
A) Butane

Q). 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

Q). 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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