Chemistry Test

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Chemistry Test - 1

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Weekly Quiz Competition

Question 1
1 / -0

Epichlorohydrin is

A
3-Chloropropane

B
3-Chloropropane-1-ol

C
3-Chloro-1, 2-epoxypropane

D
None of these

Solution
Question 2
1 / -0

Acetaldehyde and acetone differ in their reaction with

A
sodium bisulphide

B
ammonia

C
phosphorus pentachloride

D
phenylhydrazine

Solution

As methyl group donates electrons, hydrogen atom withdraws electrons; this makes the molecule more polarized, and it makes the molecule more reactive. Compared to acetone, acetaldehyde has less stearic effects, and other molecules can approach easily. Due to these reasons, acetaldehyde is more reactive than acetone.
Question 3
1 / -0

Among the following hydrocarbons which decolourise bromine water, but does not give precipitate with ammonical AgNO₃ is

A
CH₄

B
C₂H₄

C
C₂H₂

D
C₂H₆
Question 4
1 / -0

A triglyceride can have how many different acyl groups?

A
3

B
2

C
1

D
4

Solution

Esterification of glycerol will produce TG or PL. Glycerol with one acyl group is a monoacylglycerol (MAG), those with 2 acyl groups a diacylglycerol (DAG) and of course those with 3 a triacylglycerol or triglyceride molecule. There are very specific enzymes involved in each of the three esterification steps.
Question 5
1 / -0

Which of the following does not react with AgCl?

A
Na₂CO₃

B
NaNO₃

C
NH₄OH

D
Na₂S₂O₃

Solution

AgCl is insoluble in water and NaNO3 is soluble in water.and also the reverse reaction of the reaction u asked is highly stable and unidirectional.
Question 6
1 / -0

The order of filling of electrons in the orbitals of an atom is

A
3d, 4p, 4s, 4d, 5s

B
4s, 3d, 4p, 5s, 4d

C
3d, 4s, 4p, 4d, 5s

D
5s, 4p, 3d, 4d, 5s
Question 7
1 / -0

In a mole of water vapours at STP, the volume actually occupied or taken by the molecules (i.e., Avogadro's No.xvolume of one molecule) is

A
zero

B
less than 1% of 22.4 litres

C
about 10% of the volume of container

D
1% to 2% of 22.4 litres
Question 8
1 / -0

Which of the following is aromatic?

A

B

C

D
Question 9
1 / -0

Which of the following phenomenon will occur when two atoms of the elements having same spin of electron approach for bonding?

A
Orbital overlap will not occur

B
Bonding will not occur

C
Both (a) and (b) are correct

D
None of the above are correct
Question 10
1 / -0

Pi-bonds do not alter the shape, but merely shorten the

A
bond energy

B
bond angle

C
bond length

D
bond frequency

Solution

A carbon-carbon double bond consists of one sigma bond and one pi bond. This double bond is stronger than a single covalent bond (599 kJ/mol for C = C vs. 348 kJ/mol for C—C) and also shorter with an average bond length of 1.33 Angstroms (133 pm).