LGS Mixed Practice Test #688

Question 1

Smallest bone:‌​‍

Accepted Answer

Stapes — Stapes (ear).‌​‍

Answer

Femur

Answer

Radius

Answer

Patella

Question 2

Household electricity supply in India is:‌​‍

Accepted Answer

230 V, 50 Hz AC — India standard: 230 V (nominal 220 V), 50 Hz alternating current.‌​‍

Answer

110 V, 60 Hz AC

Answer

1000 V DC

Answer

12 V DC

Question 3

Cannizzaro reaction involves:‌​‍

Accepted Answer

Aldehydes without α-H in strong base → alcohol + acid salt — e.g., HCHO + NaOH → CH₃OH + HCOONa. Self-redox (disproportionation).‌​‍

Answer

Esterification

Answer

Reduction

Answer

Oxidation only

Question 4

Which part of the EM spectrum has the longest wavelength?‌​‍

Accepted Answer

Radio waves — Radio waves (km to mm) have longest wavelengths in the EM spectrum.‌​‍

Answer

Gamma

Answer

X-ray

Answer

Visible

Question 5

A teacher begins a lesson on ecosystems by showing a short, intriguing video about a natural disaster's impact on a local forest and asking students to share their initial thoughts and questions. Which phase of the 5E learning model is the teacher primarily addressing?

Accepted Answer

C. Engage — The 'Engage' phase aims to capture students' attention, activate prior knowledge, and spark curiosity, setting the context for learning. Showing an intriguing video and asking for initial thoughts perfectly serves this purpose by creating interest and getting students mentally involved before diving deeper into the topic. The other phases involve deeper investigation, formal concept introduction, or assessment.

Answer

A. Explore

Answer

B. Explain

Answer

D. Evaluate

Question 6

What is the length of the India-Nepal border?‌​‍

Accepted Answer

1,751 km — Open border.

Answer

1,000 km

Answer

2,500 km

Answer

3,000 km

Question 7

Resistance unit:

Accepted Answer

Ohm — Named after Georg Ohm.

Answer

Volt

Answer

Ampere

Answer

Watt

Question 8

Snake boat Malayalam term:‌​‍

Accepted Answer

Chundan Vallam — Chundan Vallam — snake boat (100+ rowers).‌​‍

Answer

Odi Vallam

Answer

Veppu Vallam

Answer

Churulan Vallam

Question 9

Durkheim's 'Suicide' (1897) identified types including:‌​‍

Accepted Answer

Egoistic, Altruistic, Anomic, Fatalistic — Durkheim: suicide rates vary by social integration/regulation. ‌​‍Egoistic (low integration), Altruistic (high integration), Anomic (low regulation), Fatalistic (excessive regulation).

Answer

Only individual

Answer

Only economic

Answer

Only religious

Question 10

FIFA 2026 World Cup will be hosted by:‌​‍

Accepted Answer

USA, Canada, Mexico — The FIFA 2026 World Cup will be hosted jointly by USA, Canada, and Mexico — the first tri-hosted World Cup in history.‌​‍

Answer

Qatar

Answer

India

Answer

China

LGS Mixed Practice Test #688