LGS Mixed Practice Test #228

Question 1

During a science lesson on ecosystems, a teacher asks students to design their own mini-ecosystems in jars, observe changes over time, and then discuss their findings in small groups. This activity best exemplifies a constructivist classroom because it:

Accepted Answer

C. Encourages active exploration, hypothesis testing, and peer collaboration. — Constructivist learning promotes active engagement, hands-on exploration, and social interaction, allowing students to build knowledge through direct experience and collaborative discussion. Options A, B, and D represent teacher-centric or passive learning approaches inconsistent with constructivism.

Answer

A. Ensures direct instruction from the teacher on ecological principles.

Answer

B. Allows students to passively absorb information from experiments.

Answer

D. Primarily focuses on memorizing definitions of ecosystem components.

Question 2

Muhammad bin Tughlaq shifted the capital from Delhi to:‌​‍

Accepted Answer

Daulatabad — Muhammad bin Tughlaq shifted the capital to Daulatabad (Maharashtra) — a disastrous decision.‌​‍

Answer

Agra

Answer

Lahore

Answer

Jaunpur

Question 3

Who was the author of the book 'Adwaitha Panjaram'?‌​‍

Accepted Answer

Kunjan Pillai — Sree Narayana Guru's birth name was Nanu Asan; Adwaitha Panjaram is among his philosophical works.‌​‍

Answer

Vakkom Maulavi

Answer

Thycaud Ayya Guru

Answer

V.T. Bhattathirippad

Question 4

Barium sulfate is widely used as a radiocontrast agent for imaging the gastrointestinal tract. Despite the inherent toxicity of soluble barium compounds, barium sulfate is safe for this application due to which key chemical property?

Accepted Answer

C. Its extreme insolubility in water and biological fluids. — Barium sulfate is safe as a contrast agent because it is highly insoluble in water and biological fluids. This insolubility prevents the absorption of toxic barium ions into the bloodstream from the gastrointestinal tract. If it were soluble, the barium ions would be absorbed and cause significant toxicity.

Answer

A. Its high solubility in water and biological fluids.

Answer

B. Its rapid absorption into the systemic circulation from the GI tract.

Answer

D. Its strong chelating properties with heavy metals.

Question 5

Which part of the human brain is primarily responsible for maintaining posture, balance, and coordinating voluntary movements, ensuring smooth and precise actions?

Accepted Answer

C. Cerebellum — The cerebellum plays a vital role in motor control, coordinating muscle movements, maintaining balance, and regulating posture. The cerebrum is involved in higher-level functions, the brainstem controls vital involuntary functions, and the thalamus acts as a relay station for sensory information.

Answer

A. Cerebrum

Answer

B. Brainstem

Answer

D. Thalamus

Question 6

Digital India programme:‌​‍

Accepted Answer

1 July 2015 — Pillars: broadband highways, universal access, e-governance, digital empowerment. ‌​‍UPI, Aadhaar, Jan Dhan drove financial inclusion.

Answer

2018

Answer

2020

Answer

2014

Question 7

Delimitation Commission Act:

Accepted Answer

2002 — Delimitation Act 2002.

Answer

1972

Answer

1952

Answer

2008

Question 8

The Third Battle of Panipat (1761) was between:‌​‍

Accepted Answer

Marathas and Ahmad Shah Abdali — The Marathas were decisively defeated by Ahmad Shah Abdali (Durrani) at the Third Battle of Panipat (1761).‌​‍

Answer

Mughals and British

Answer

Sikhs and Mughals

Answer

Rajputs and Mughals

Question 9

Hall-Héroult process extracts:‌​‍

Accepted Answer

Aluminium (electrolysis of Al₂O₃ in molten cryolite) — Cryolite (Na₃AlF₆) lowers m.p. ‌​‍from 2000°C to ~950°C. Carbon anode, steel cathode.

Answer

Zinc

Answer

Iron

Answer

Copper

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

LGS Mixed Practice Test #228