Chemistry Test 156

Result

Chemistry Test 156

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Weekly Quiz Competition

Question 1
4 / -1

A

B

C

D

Solution

Since, C when heated with Br₂in presence of KOH produces ethylamine, hence it must be propanamide and hence the organic compound (A) will be propanoic acid. The reaction follows.
Question 2
4 / -1

A

B

C

D

Solution
Question 3
4 / -1

A
long unbranched chain, C1– C6.

B
branched chain, C1 – C4.

C
long unbranched chain, C1– C4.

D
branched chain, C1– C6

Solution

Chemically amylose is a long unbranched chain with 200-1000 a–D–(+ –glucose units held by C1-C4 glycosidic linkage.
Question 4
4 / -1

Structures of some common polymers are given. Which one is not correctly presented?

A

B

C

D

Solution

Neoprene is a polymer of chloroprene. Hence, correct representation is
Question 5
4 / -1

Directions For Questions

Which of the following is not correctly matched?

(i) Proteins that are – Receptors crucial to body’s communication process.

(ii) Drugs that mimic – Antagonists the natural messenger by switching on the receptor.

(iii) Drugs that binds to – Agonists the receptor site and inhibit its

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natural function.

A
(ii) only

B
(iii) only

C
(i) and (iii)

D
(ii) and (iii)

Solution

Drugs that mimic the natural messenger by switching on the receptor are called agonists. While drugs that binds to the receptor site and inhibit its natural function are called antagonists.
Question 6
4 / -1

A

B

C

D

Solution
Question 7
4 / -1

If f denotes reduction potential, then which is true?

A

B

C

D

Solution
Question 8
4 / -1

A
20

B
300

C
120

D
280

Solution
Question 9
4 / -1

A colloidal solution is subjected to an electrical field. The particles move towards anode. The coagulation of same sol is studied using NaCl, solutions. Their coagulating power should be

A

B

C

D

Solution

The movement towards anode shows that sol is negative. For coagulation of negative sol. Cation with higher charge is more effective.
Question 10
4 / -1

Which of the following elements is present as the impurity to the maximum extent in the pig iron?

A
Manganese

B
Carbon

C
Silicon

D
Phosphorus

Solution

Pig iron or cast iron contains 3 – 5% carbon and varying amounts of Mn, Si, P and S which makes the iron hard and brittle.