Plus 2 Lecturer Mixed Practice Test #52

Question 1

The keto group C=O (between two carbons) is characteristic of:

Accepted Answer

Ketones — Ketones have C=O with two C attached (e.g., acetone CH₃COCH₃).

Answer

Aldehydes

Answer

Alcohols

Answer

Acids

Question 2

Which part of the respiratory system is responsible for the exchange of oxygen and carbon dioxide between the air and the blood?

Accepted Answer

C. Alveoli — The alveoli are tiny air sacs in the lungs where gas exchange occurs. The trachea and bronchi are air passageways, while the pharynx is part of the upper respiratory tract and does not participate in gas exchange.

Answer

A. Trachea

Answer

B. Bronchi

Answer

D. Pharynx

Question 3

How many bytes are in 1 Kilobyte (KB)?‌​‍

Accepted Answer

1024 bytes — 1 KB = 1024 bytes (2¹⁰). Computers use binary (powers of 2), not decimal.‌​‍

Answer

1000 bytes

Answer

512 bytes

Answer

2048 bytes

Question 4

What is the primary focus of the Nari Shakti Vandan Adhiniyam?‌​‍

Accepted Answer

Women reservation — 33% reservation for women in LS and state legislature.‌​‍

Answer

Rural empowerment

Answer

Education

Answer

Health

Question 5

Internet users India (approx):‌​‍

Accepted Answer

850+ million — ~850M users.‌​‍

Answer

500M

Answer

1 billion+

Answer

2 billion

Question 6

Indirect: He asked, 'Where do you live?'‌​‍

Accepted Answer

He asked where I lived — WH-question: remove do/does, change tense. No question mark in indirect.‌​‍

Answer

He asked where do I live

Answer

He asked where did I live

Answer

He asked that where I lived

Question 7

Packing efficiency of FCC:‌​‍

Accepted Answer

74.05% — Maximum in cubic systems. HCP also 74%. Simple cubic: 52.4%; BCC: 68%.‌​‍

Answer

52.36%

Answer

100%

Answer

68%

Question 8

The mirror in a torch is:‌​‍

Accepted Answer

Concave — Concave mirror produces focused beam.‌​‍

Answer

Plane

Answer

Convex

Answer

Cylindrical

Question 9

First RRTS (Namo Bharat) section:

Accepted Answer

Delhi-Meerut — Delhi-Ghaziabad-Meerut RRTS — first section opened Oct 2023.

Answer

Delhi-Gurgaon

Answer

Delhi-Jaipur

Answer

Mumbai-Pune

Question 10

Low-dose aspirin is commonly prescribed for cardiovascular disease prevention due to its antiplatelet effect. This effect is primarily achieved by:

Accepted Answer

A. Inhibiting thromboxane A2 synthesis. — Aspirin exerts its antiplatelet effect by irreversibly inhibiting cyclooxygenase-1 (COX-1) in platelets. This inhibition prevents the synthesis of thromboxane A2 (TXA2), a potent mediator of platelet aggregation and vasoconstriction. By reducing TXA2 production, aspirin effectively diminishes platelet aggregation and reduces the risk of thrombotic events.

Answer

B. Activating plasminogen.

Answer

C. Blocking ADP receptors on platelets.

Answer

D. Inhibiting factor Xa.

Plus 2 Lecturer Mixed Practice Test #52