LGS Mixed Practice Test #248

Question 1

Following a significant crude oil spill impacting the coastal mangroves and backwaters of Kerala, local authorities are exploring advanced remediation strategies. Which biotechnological approach offers the most sustainable and environmentally sound solution for long-term cleanup in this sensitive ecosystem?

Accepted Answer

B. Introduction of genetically modified bacteria specifically engineered to metabolize and detoxify petroleum hydrocarbons. — The correct answer is B. Introducing genetically modified bacteria for bioremediation is a biotechnological approach that utilizes microorganisms' metabolic pathways to break down pollutants into less harmful substances. This method is sustainable and environmentally sound as it naturally degrades the hydrocarbons, unlike chemical dispersants (A) which can be toxic or physical removal methods like dredging (C) and high-pressure washing (D) that are disruptive and may not fully eliminate the pollutant from the ecosystem.

Answer

A. Extensive application of synthetic chemical dispersants to break down the oil into smaller droplets.

Answer

C. Dredging and removal of contaminated sediments, followed by their disposal in a designated landfill.

Answer

D. High-pressure washing of affected areas using strong alkaline solutions to dislodge oil from surfaces.

Question 2

Which is the most abundant element in the Earth's crust?‌​‍

Accepted Answer

Oxygen — Oxygen is the most abundant element in the Earth's crust (~46% by weight). ‌​‍Silicon is second (~28%), followed by Aluminium (~8%) and Iron (~5%).

Answer

Silicon

Answer

Aluminium

Answer

Iron

Question 3

Which of the following is NOT an SI base unit?

Accepted Answer

Newton — Newton is a derived unit (kg·m/s²). SI base units are m, kg, s, A, K, mol, cd.

Answer

Metre

Answer

Kilogram

Answer

Second

Question 4

Boyle's law states (at constant temperature):‌​‍

Accepted Answer

PV = constant — Boyle's law: P ∝ 1/V at constant T (PV = constant).‌​‍

Answer

P/V = constant

Answer

V/P = constant

Answer

V + P = constant

Question 5

Kerala Police mascot:

Accepted Answer

Kerala elephant — Elephant in logo.

Answer

Tiger

Answer

Lion

Answer

None

Question 6

The scientific name of humans is:‌​‍

Accepted Answer

Homo sapiens — Modern humans are classified as Homo sapiens.‌​‍

Answer

Homo habilis

Answer

Homo neanderthalensis

Answer

Homo erectus

Question 7

Positive phototropism:‌​‍

Accepted Answer

Stems toward light — Stems grow toward light.‌​‍

Answer

Roots toward light

Answer

Neither

Answer

Both

Question 8

The National Education Policy (NEP) 2020 emphasizes the integration of vocational education into mainstream education. Which of the following best describes the approach for this integration in schools?

Accepted Answer

A. Students can opt for vocational subjects as elective courses alongside academic subjects from Grade 6 onwards, including internships. — NEP 2020 advocates for integrating vocational education into mainstream schooling from Grade 6 onwards, allowing students to choose vocational subjects as electives and providing opportunities for internships. This approach aims to break down rigid separations between academic and vocational streams, making vocational education accessible and respected. It does not propose a separate stream for non-qualifiers, mandatory trades from Grade 1, or limiting vocational training to specialized schools.

Answer

B. Vocational education will be a separate, parallel stream for students who do not qualify for academic courses after Grade 8.

Answer

C. All students will be mandatorily assigned a vocational trade from Grade 1, irrespective of their interest.

Answer

D. Vocational training will be offered only in specialized vocational schools, completely separate from general education schools.

Question 9

The property of matter by which it resists change in state of rest or uniform motion is:‌​‍

Accepted Answer

Inertia — Inertia is quantified by mass; more mass = more inertia.‌​‍

Answer

Velocity

Answer

Momentum

Answer

Force

Question 10

The captain of the volunteer group of Guruvayoor Satyagraha was:‌​‍

Accepted Answer

A.K. Gopalan — A.K. Gopalan led the volunteer group during Guruvayoor Satyagraha (1931-32).‌​‍

Answer

Chattampi Swamikal

Answer

Gandhi

Answer

Sree Narayana Guru

LGS Mixed Practice Test #248