LGS Mixed Practice Test #28

Question 1

pH of neutral water at 25°C is:‌​‍

Accepted Answer

7 — Kw = [H⁺][OH⁻] = 10⁻¹⁴ at 25°C → [H⁺] = 10⁻⁷ M → pH=7. ‌​‍At higher T, Kw increases; pH of neutral water drops.

Answer

1

Answer

14

Answer

0

Question 2

Kerala's famous festival calendar:

Accepted Answer

Kollavarsham (Malayalam Era) — Kollavarsham (Malayalam Era) — started 825 CE.

Answer

Saka era

Answer

Vikram samvat

Answer

Hijri

Question 3

India is part of BRICS, G20, SCO, QUAD. QUAD comprises:‌​‍

Accepted Answer

India, US, Japan, Australia — QUAD = Quadrilateral Security Dialogue. ‌​‍Indo-Pacific strategic grouping revived in 2017.

Answer

India, US, UK, Australia

Answer

India, China, Russia, Brazil

Answer

India, US, Japan, UK

Question 4

Chattampi Swamikal samadhi:‌​‍

Accepted Answer

Panmana — Panmana, Kollam (1924).‌​‍

Answer

Sivagiri

Answer

Aruvippuram

Answer

Kaladi

Question 5

EU (European Union) emerged from which treaty?‌​‍

Accepted Answer

All three contributed — Rome (1957) → EEC. ‌​‍Maastricht (1993) → EU formally. Lisbon (2009) → current constitutional framework. ‌​‍Single market, single currency, free movement.

Answer

Treaty of Lisbon

Answer

Treaty of Rome (1957)

Answer

Maastricht Treaty (1993)

Question 6

A teacher uses an interactive smartboard to explain a complex concept in science. What is the key pedagogical benefit of this approach?

Accepted Answer

B. It allows for dynamic, visual explanations that can be annotated in real-time — Interactive smartboards enable real-time annotations, visual demonstrations, and engagement, which enhances comprehension through dynamic teaching. However, they do not replace textbooks entirely, guarantee universal understanding, or reduce lesson preparation duties.

Answer

A. It replaces the need for traditional textbooks entirely

Answer

C. It ensures all students will achieve 100% understanding of the topic

Answer

D. It reduces the teacher's responsibility for lesson preparation

Question 7

Noida International Airport:‌​‍

Accepted Answer

Both — Both.‌​‍

Answer

Greater Noida

Answer

Jewar

Answer

Under construction

Question 8

During skeletal muscle contraction, which ion is released from the sarcoplasmic reticulum and binds to troponin, initiating the sliding filament mechanism?

Accepted Answer

C. Calcium (Ca2+) — Calcium ions (Ca2+) are released from the sarcoplasmic reticulum and bind to troponin, causing a conformational change that exposes the myosin-binding sites on actin, thus initiating muscle contraction. Sodium and potassium are crucial for nerve impulse transmission and muscle action potentials, but calcium directly triggers the contractile mechanism. Chloride ions are not directly involved in initiating muscle contraction.

Answer

A. Sodium (Na+)

Answer

B. Potassium (K+)

Answer

D. Chloride (Cl-)

Question 9

The 'Kerala Sangeetha Nataka Akademi Award' is given for excellence in which field?

Accepted Answer

C. Music and dance — The Kerala Sangeetha Nataka Akademi Award is specifically awarded for excellence in music and dance. Option A refers to a different award (Kerala Sahitya Akademi Award), while options B and D are incorrect as the Akademi focuses on performing arts rather than theatre or visual arts.

Answer

A. Literature and poetry

Answer

B. Theatre and performing arts

Answer

D. Visual arts and sculpture

Question 10

In a classroom where students have varying learning paces, which teaching aid would BEST support differentiated instruction?

Accepted Answer

C. Adaptive learning platforms like Khan Academy or BYJU’S — Adaptive learning platforms adjust content difficulty based on individual student performance, catering to varying learning paces. While audiobooks and textbooks lack interactivity, uniform worksheets fail to address diverse learning needs effectively.

Answer

A. Single textbook for all students

Answer

B. Audiobooks for every chapter

Answer

D. Uniform set of worksheets for all students

LGS Mixed Practice Test #28