Plus 2 Lecturer Mixed Practice Test #973

Question 1

World's 2nd largest rice producer:

Accepted Answer

India — India (after China).

Answer

China

Answer

Bangladesh

Answer

Indonesia

Question 2

'Social institutions' in sociology include all of the following EXCEPT:‌​‍

Accepted Answer

Weather — Weather is a natural phenomenon; social institutions are societal frameworks (family, religion, education, etc.).‌​‍

Answer

Educational institutions

Answer

Religion

Answer

Family

Question 3

The cube root of 343 is:

Accepted Answer

7 — 7³ = 343.

Answer

5

Answer

6

Answer

9

Question 4

Nylon 6,6 is a synthetic polymer renowned for its high tensile strength, elasticity, and abrasion resistance, making it suitable for various industrial applications. Considering its chemical structure and synthesis, which of the following statements accurately describes the formation and a key application of Nylon 6,6?

Accepted Answer

B. It is formed by the condensation polymerization of hexamethylenediamine and adipic acid, and is primarily used in manufacturing ropes and fabrics. — Nylon 6,6 is a polyamide synthesized through condensation polymerization, involving the reaction between hexamethylenediamine and adipic acid, where water molecules are eliminated. Its robust mechanical properties, including high tensile strength and abrasion resistance, make it ideal for industrial applications such as ropes, textiles, and engineering plastics. Option A describes Nylon 6 and misidentifies its application; Option C describes polyethylene/polypropylene and misidentifies the application; Option D describes Polyethylene Terephthalate (PET).

Answer

A. It is formed by the addition polymerization of caprolactam and is primarily used in manufacturing electrical insulators.

Answer

C. It is formed by the addition polymerization of ethene and propene monomers, and is primarily used in non-stick coatings.

Answer

D. It is formed by the condensation polymerization of terephthalic acid and ethylene glycol, and is primarily used in making high-strength plastic bottles.

Question 5

Which of the following is a non-protein nitrogenous compound excreted in urine?

Accepted Answer

B. Urea — Urea (B) is a primary non-protein nitrogenous waste product excreted in urine. Glucose (A) is not nitrogenous; hemoglobin (C) and bilirubin (D) are protein-bound or conjugated metabolites, not typical NPN compounds.

Answer

A. Glucose

Answer

C. Hemoglobin

Answer

D. Bilirubin

Question 6

Dry ice is solid:‌​‍

Accepted Answer

Carbon Dioxide — Dry ice = solid CO₂. Sublimes directly to gas at -78.5°C.‌​‍

Answer

Oxygen

Answer

Nitrogen

Answer

Water

Question 7

Kerala elephant count:‌​‍

Accepted Answer

Thousands — Several thousand elephants.‌​‍

Answer

Hundreds

Answer

Extinct

Answer

Few

Question 8

Dry ice is:‌​‍

Accepted Answer

Solid CO₂ — Solid Carbon Dioxide.‌​‍

Answer

Solid O₂

Answer

Solid N₂

Answer

Solid H₂O

Question 9

DNA stands for:‌​‍

Accepted Answer

Deoxyribonucleic Acid — Deoxyribonucleic Acid.‌​‍

Answer

Di Nitro Acid

Answer

Dynamic Nuclear Acid

Answer

None

Question 10

Lithology studies:

Accepted Answer

Rocks and strata — Rock types: igneous (magma), sedimentary (deposition), metamorphic (heat/pressure). Rock cycle interconverts.

Answer

Life

Answer

Climate

Answer

Water

Plus 2 Lecturer Mixed Practice Test #973