Chemistry Test 33

Result

Chemistry Test 33

Score
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Rank
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TIME Taken - -

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Weekly Quiz Competition

Question 1
4 / -1

For making good quality mirrors, plates of float glass are used. These are obtained by floating molten glass over a liquid metal which does not solidify before glass. The metal used can be

A
mercury

B
tin

C
sodium

D
magnesium

Solution

The metal used can be mercury
Hence, option A is correct.
Question 2
4 / -1

Glucose reacts with acetyl chloride to form penta acetyl glucose, it indicates presence of

A
Five primary alcoholic groups

B
Five secondary alcoholic groups

C
Aldehyde as well as alcoholic group

D
Five – OH groups

Solution

One molecules of CH₃COCl reacts at one – OH.
– OH + CH₃COCl → – OOCCH₃
Hence, option D is correct.
Question 3
4 / -1

One mole of a symmetrical alkene on ozonolysis gives two moles of an aldehyde having a molecular mass of 44 u. The alkene is

A
ethene

B
propene

C
1–butene

D
2–butene

Solution

Given that the Molar mass 44.

The homologous series of aldehydes with molar mass is -

HCHO - 30

CH3CHO - 44

Therefore, the symmetrical alkene which can form ethanal on ozonolysis can only be
2–butene.

Also, 1 butene and propene are not symmetrical. And Ethene on ozonoloysis would given methanal which has a molar mass of 30. So by elimination, the answer should still be 2-butene.