LGS Mixed Practice Test #111

Question 1

Ozone layer protects by:

Accepted Answer

Absorbing UV-B/C radiation — Stratospheric O₃. Depletion by CFCs. Dobson Units (DU) measure. Antarctic 'hole' discovered 1985. Montreal Protocol 1987.

Answer

Producing O₂

Answer

Blocking all light

Answer

Cooling Earth

Question 2

∫sin x dx =‌​‍

Accepted Answer

-cos x + C — ∫cos x dx = sin x + C. Sign flip from derivative direction.‌​‍

Answer

cos x + C

Answer

-sin x

Answer

sin x

Question 3

Nobel Physics 2024 was for:‌​‍

Accepted Answer

AI/neural networks — Hinton and Hopfield for foundational AI work.‌​‍

Answer

Quantum

Answer

Genetics

Answer

Climate

Question 4

SW monsoon arrives Kerala:‌​‍

Accepted Answer

1 June — ~1 June (normal date).‌​‍

Answer

1 July

Answer

15 June

Answer

15 July

Question 5

The author of 'Train to Pakistan' is:

Accepted Answer

Khushwant Singh — Khushwant Singh's 'Train to Pakistan' (1956) depicts Partition-era violence.

Answer

Salman Rushdie

Answer

Vikram Seth

Answer

Amitav Ghosh

Question 6

To which country was the first Akash SAM exported?‌​‍

Accepted Answer

To Armenia — First export of Akash to Armenia.‌​‍

Answer

US

Answer

None

Answer

Cancelled

Question 7

In a classroom utilizing the 5E instructional model, particularly during the 'Explore' and 'Elaborate' phases, what is the most appropriate role for the teacher?

Accepted Answer

B. Acting as a facilitator, guiding student inquiry, and posing probing questions. — In constructivist models like 5E, the teacher shifts from a lecturer to a facilitator. During 'Explore' and 'Elaborate', the teacher's role is to guide students as they investigate and apply concepts, encouraging independent thinking and problem-solving through questions rather than providing direct answers. Options A, C, and D represent more traditional, teacher-centered roles.

Answer

A. Delivering explicit instructions and correct answers.

Answer

C. Primarily evaluating student performance through summative assessments.

Answer

D. Maintaining strict control over all student activities to ensure conformity.

Question 8

The vital human requirement per day of water intake is approximately:‌​‍

Accepted Answer

2–3 litres — Recommended water intake: ~2–3 L/day including food moisture.‌​‍

Answer

500 ml

Answer

200 ml

Answer

10 litres

Question 9

Hybridization in graphite:‌​‍

Accepted Answer

sp² — Planar hexagonal layers; each C sp² bonded to 3 Cs. ‌​‍Remaining p-electron delocalised → electrical conductivity along layer.

Answer

sp³

Answer

sp³d

Answer

sp

Question 10

The earliest epigraphical record on 'Kollam Era' is:‌​‍

Accepted Answer

Tarisapalli copper plate — Tarisapalli/Tharisappalli copper plates (849 CE) — earliest record of the Kollam Era.‌​‍

Answer

Mampalli plate

Answer

Chaliyam plate

Answer

Vazhappilli inscription

LGS Mixed Practice Test #111