Plus 2 Lecturer Mixed Practice Test #978

Question 1

Atoms with the same number of neutrons but different protons are called:‌​‍

Accepted Answer

Isotones — Isotones share N but differ in Z (e.g., ¹⁴C and ¹⁶O both have 8 neutrons).‌​‍

Answer

Isotopes

Answer

Isomers

Answer

Isobars

Question 2

When does an ionic bond form?‌​‍

Accepted Answer

Electrons are transferred from one atom to another — Metal loses electron(s), non-metal gains them — forming ions attracted electrostatically.‌​‍

Answer

Protons combine

Answer

Electrons are shared between atoms

Answer

Atoms fuse

Question 3

d/dx (x^n) =‌​‍

Accepted Answer

nx^(n-1) — Power rule. d/dx(x²) = 2x; d/dx(x³) = 3x².‌​‍

Answer

x^n

Answer

x^(n-1)

Answer

n!

Question 4

Hard water contains dissolved:‌​‍

Accepted Answer

Calcium and magnesium salts — Hard water has Ca²⁺/Mg²⁺ from limestone — makes soap less effective, forms scum.‌​‍

Answer

Iron oxide

Answer

Potassium salts

Answer

Sodium salts

Question 5

Most local anesthetics contain a tertiary amine group. This specific functional group is critical for which aspect of their mechanism of action?

Accepted Answer

B. Allowing the drug to exist in an ionized form that can bind to intracellular sodium channels. — The tertiary amine group in local anesthetics allows them to be protonated (ionized) at physiological pH. While the uncharged form crosses the neuronal membrane, the intracellular charged form is essential for binding to the voltage-gated sodium channels from the inside, thereby blocking nerve impulse transmission. The amide linkage, not the tertiary amine, is responsible for resistance to esterase metabolism, and the overall structure is designed for membrane penetration.

Answer

A. Increasing the overall lipophilicity of the drug molecule.

Answer

C. Preventing their metabolism by plasma esterases or hepatic enzymes.

Answer

D. Enhancing the drug's ability to remain in the extracellular space.

Question 6

Globalisation refers to:‌​‍

Accepted Answer

Intensification of worldwide social, economic, cultural, political connections — Globalisation includes trade, finance, migration, information, culture flows — connecting nations more intensively since 1990s.‌​‍

Answer

Only trade

Answer

Only immigration

Answer

Only internet

Question 7

The Union Government aims to promote a specific national health initiative (e.g., universal vaccination program) which falls primarily under the State List. To ensure its effective implementation across all states, including those with limited financial capacity or differing priorities, the Centre seeks to provide financial assistance linked with performance metrics. Which of the following constitutional provisions would be the most appropriate mechanism for the Union to disburse such funds and issue accompanying directions?

Accepted Answer

B. Article 282 (Discretionary grants by the Union or States). — Article 282 provides for discretionary grants by the Union to States for any public purpose, allowing the Union to attach specific conditions and performance metrics for the utilization of funds. This makes it the most suitable mechanism for funding specific national initiatives under the State List while ensuring accountability and adherence to central guidelines. Article 275 grants are primarily statutory, recommended by the Finance Commission, and less flexible for conditional, scheme-specific funding. Article 293 relates to borrowing powers of states, and Article 256 deals with administrat

Answer

A. Article 275 (Grants from the Union to certain States).

Answer

C. Article 293 (Borrowing by States).

Answer

D. Article 256 (Obligation of States and the Union).

Question 8

The Nilgiri Biosphere Reserve spans:‌​‍

Accepted Answer

Kerala, Tamil Nadu, Karnataka — Nilgiri Biosphere Reserve spans parts of Kerala, Tamil Nadu, and Karnataka.‌​‍

Answer

Kerala only

Answer

Kerala and Tamil Nadu

Answer

All South Indian states

Question 9

Match authors to works: (a) C.V. ‌​‍Raman Pillai (b) K.M. Panikkar (c) A.R. ‌​‍Raja Raja Varma (d) Kesava Dev with (i) Malaya Vilasam (ii) Premamritam (iii) Parankipatayali (iv) Odayil Ninnu

Accepted Answer

a-ii, b-iii, c-i, d-iv — Premamritam-C.V. ‌​‍Raman Pillai; Parankipatayali-K.M. Panikkar; Malaya Vilasam-A.R. ‌​‍Raja Raja Varma; Odayil Ninnu-Kesava Dev.

Answer

a-iii, b-i, c-ii, d-iv

Answer

a-iii, b-ii, c-i, d-iv

Answer

a-iv, b-iii, c-ii, d-i

Question 10

Isotopes of an element contain the same number of:‌​‍

Accepted Answer

protons but different neutrons — Isotopes share atomic number (protons) but differ in neutron count.‌​‍

Answer

neutrons and electrons but different protons

Answer

neutrons and protons

Answer

neutrons and protons but different electrons

Plus 2 Lecturer Mixed Practice Test #978