Daily Quiz- 185

Rock solid GK

Chandigarh, Updated At : 08:16 PM Aug 10, 2025 IST

Looking down on the alluvial fan of a small stream.

1. Which of the following soils is formed due to the weathering of basalt rock and is most suitable for cotton cultivation?

A. Laterite soil

B. Black cotton soil

C. Red soil

D. Alluvial soil

2. The red colour of red soil is primarily due to:

A. Ferric oxide in crystalline form

B. Ferric oxide in hydrated form

C. Organic matter oxidation

D. Laterisation process

3. Which one of the following is not correctly matched?

A. Alluvial soils — Indus-Ganga-Brahmaputra plains

B. Laterite soils — High rainfall & leaching zones

C. Desert soils — Low soluble salts content

D. Peaty soils — High organic matter content

4. Which soil type is predominant in the Malwa Plateau?

A. Lateritic soil

B. Regur soil

C. Alluvial soil

D. Red loamy soil

5. The lateritic soils are poor in nitrogen and calcium because:

A. Heavy leaching due to high rainfall

B. Poor parent rock composition

C. Low humus content due to high temperatures

D. Excessive irrigation

1. D

Explanation: The NDMA exercise simulated an earthquake along the Himalayan Frontal Thrust (HFT) due to rising vulnerability in North India.

2. D

Explanation: Srinagar is highly vulnerable due to its location in seismic Zone V and high population density.

3. C

Explanation: Piezoelectric effect due to rock stress can cause luminous discharges known as “earthquake lightning.”

4. C

Explanation: Nevado del Ruiz in Colombia became active again in 2025 after decades, triggering emergency protocols.

5. B

Explanation: The Afar Triangle shows signs of continental rifting, a precursor to new plate boundary formation.