LGS Mixed Practice Test #569

Question 1

Non-renewable energy sources include:

Accepted Answer

Coal, petroleum, natural gas, nuclear fuel — Fossil fuels and nuclear fuels are non-renewable (finite, not replenished quickly).

Answer

Solar, wind, tidal

Answer

Geothermal

Answer

Biomass

Question 2

Which of the following is NOT a mechanism of bacterial resistance to antibiotics?

Accepted Answer

D. Increased synthesis of host cell receptors — Increased synthesis of host cell receptors is not a bacterial resistance mechanism; it is a host response. Beta-lactamase production, target site alteration (e.g., penicillin-binding protein changes), and biofilm formation are well-documented resistance mechanisms.

Answer

A. Production of beta-lactamase enzymes

Answer

B. Alteration of target site to reduce drug binding

Answer

C. Formation of biofilms to protect bacterial communities

Question 3

Strongest acid among HF, HCl, HBr, HI:‌​‍

Accepted Answer

HI — Bond strength: HF > HCl > HBr > HI (decreases). ‌​‍Weaker bond = easier proton release → stronger acid. HF unusual due to H-bonding.

Answer

HCl

Answer

HBr

Answer

HF

Question 4

Which social group is most likely to experience social exclusion in Kerala?

Accepted Answer

B. Scheduled Tribes in remote areas — Scheduled Tribes in remote areas often face social exclusion due to geographical isolation, lack of access to education, and economic barriers. Urban professionals, college students, and government employees generally have better access to resources and social integration.

Answer

A. Urban professionals

Answer

C. College students

Answer

D. Government employees

Question 5

A student who was initially enthusiastic about learning a new language has started to show decreased interest after the teacher introduced a system of daily points and public leaderboards for vocabulary memorization. This scenario best illustrates which potential drawback of extrinsic motivation?

Accepted Answer

B. Extrinsic rewards can sometimes diminish intrinsic motivation. — This scenario demonstrates the 'overjustification effect,' where the introduction of extrinsic rewards for an activity that was previously intrinsically rewarding can lead to a decrease in intrinsic motivation. The student's initial enthusiasm declined when the focus shifted from the joy of learning to external points and competition. While extrinsic motivation can be effective in certain contexts, over-reliance or inappropriate application can sometimes have negative consequences on internal drive.

Answer

A. Extrinsic motivation is always ineffective for learning.

Answer

C. Extrinsic motivation works best for complex tasks.

Answer

D. Extrinsic motivation exclusively targets lower-order skills.

Question 6

Nilgiri Biosphere Reserve spans:‌​‍

Accepted Answer

TN, Kerala, Karnataka — First biosphere reserve of India (1986). ‌​‍Includes Mudumalai, Bandipur, Nagarhole, Silent Valley, Mukurti, Aralam.

Answer

Kerala only

Answer

Gujarat

Answer

AP

Question 7

CUET exam for:‌​‍

Accepted Answer

College Admission — Common University Entrance Test.‌​‍

Answer

Engineering

Answer

School

Answer

Civil Services

Question 8

Antiseptic vs disinfectant:‌​‍

Accepted Answer

Antiseptic for living tissue (dettol), disinfectant for non-living (bleach) — Dilute phenol is antiseptic; concentrated is disinfectant. ‌​‍Same molecule different concentration/target.

Answer

Neither medical

Answer

Both for food

Answer

Same thing

Question 9

A tall, slender individual with a strong desire for cold drinks, burning pains that are ameliorated by cold applications, and a tendency to haemorrhage (e.g., nosebleeds) is afraid of thunderstorms. Which remedy is indicated?

Accepted Answer

B. Phosphorus — Phosphorus individuals are typically tall and slender, desire cold drinks, experience burning pains relieved by cold, have a haemorrhagic tendency, and are very sensitive, especially to thunderstorms. Arsenicum album has burning pains but desires warmth and is restless. Sulphur is warm-blooded and worse by heat, and Sanguinaria is known for right-sided headaches and burning palms/soles.

Answer

A. Arsenicum album

Answer

C. Sulphur

Answer

D. Sanguinaria

Question 10

Swathi Thirunal known for:‌​‍

Accepted Answer

Music and modernisation — Scholar-king, Carnatic/Hindustani composer.‌​‍

Answer

Military conquest

Answer

Temple building

Answer

Social reform

LGS Mixed Practice Test #569