OC B-group

OC B-group

12th Grade

15 Qs

quiz-placeholder

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OC B-group

OC B-group

Assessment

Quiz

Chemistry

12th Grade

Hard

Created by

Siddharth Kamat

Used 1+ times

FREE Resource

15 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the case of maize starch if its paste is kept without heating and without agitating for a long time thick lumps are formed which are difficult to be broken by heating and agitation again is called

Adhesivity of the starch.

Keeping Property of the starch.

Congealing property of the starch.

Gelatinization of starch.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

When the mixture of starch and water is heated starch granules swell and at a certain high temperature they swell to the maximum extent and occupy completely the whole volume of water thus forming the starch paste this is called

Adhesivity of the starch.

Keeping Property of the starch.

Congealing property of the starch.

Gelatinization of starch.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

During the manufacturing of starch from maize the step(s) involves

Soaking in 0.15 to 0.2 % solution of sulphur dioxide, kept at 50 to 55°C for 40 to 48 hours to soften the outer cover.

The softened grains are then lightly crushed between studded plates to open out the kernel and separate the oil-containing germ.  

The slurry of starch paste passes into a centrifuge where the lighter gluten floats near the top and the heavier starch sinks down.

All of these.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

When two groups attached to olefinic bond are not same and if two groups of highest priority are on the opposite side of the double bond, the isomer is assigned

Cis isomers

Optical isomers

E isomers

Z isomers

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Benzene diazonium chloride on treatment with sodium sulphite forms

Benzene sulphite

Phenyl hydrazine

Sodium benzene sulphonate

Benzene sulphonic acid

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Benzene diazonium chloride on treatment with benzene in NaOH generate compound

Diphenyl

p-hydroxy azobenzene

Ethyl phenyl ether

Ethyl benzoate

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Benzene diazonium chloride on treatment with boiling water generate compound

Phenol

p-hydroxy azobenzene

Ethyl phenyl ether

Ethyl benzoate

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