DCOA Mixed Practice Test #499

Question 1

Which metal is stored under kerosene to prevent reaction with air?‌​‍

Accepted Answer

Sodium — Sodium reacts violently with moisture/air — stored under kerosene.‌​‍

Answer

Gold

Answer

Copper

Answer

Iron

Question 2

In an inclusive classroom setting, a teacher observes that a student with specific learning disability struggles with reading comprehension despite various general strategies. Which of the following approaches best reflects the principle of 'differentiated instruction' for this student?

Accepted Answer

D. Offering alternative formats for text (e.g., audiobooks, graphic organizers) and individualized reading strategies. — Differentiated instruction involves tailoring teaching methods, content, and assessment to meet individual student needs. Offering alternative formats and individualized strategies directly modifies the instruction to support the student's specific learning challenge. Providing extra time is an accommodation, while assigning to a separate room is segregation, and lowering expectations undermines the goal of access to the curriculum.

Answer

A. Providing extra time for completing assignments and tests without altering the content.

Answer

B. Assigning the student to a separate resource room for all language arts instruction.

Answer

C. Modifying the assessment criteria to lower expectations for the student's performance.

Question 3

Acid rain primarily contains:

Accepted Answer

H₂SO₄ and HNO₃ (from SO₂ and NOₓ) — Burning fossil fuels releases SO₂ (→H₂SO₄) and NOₓ (→HNO₃) — acid rain.

Answer

HCl

Answer

HF

Answer

H₂CO₃ only

Question 4

India became the ___ country to land on the Moon's south pole:‌​‍

Accepted Answer

First — India became the first country to successfully land a spacecraft near the Moon's south polar region.‌​‍

Answer

Fourth

Answer

Second

Answer

Third

Question 5

Tholpavakoothu (shadow puppetry) is performed in temples of which district mainly?‌​‍

Accepted Answer

Palakkad — Tholpavakoothu is performed in Bhadrakali temples of Palakkad district, narrating the Ramayana.‌​‍

Answer

Kozhikode

Answer

Thrissur

Answer

Malappuram

Question 6

In Kerala's physiographic division, the 'highland' region is predominantly composed of which geological formation?

Accepted Answer

C. Archaean rocks — The Highland region of Kerala is predominantly composed of Archaean rocks, which are the oldest geological formations in the region. Laterite is found in the Midland, while alluvium and sedimentary deposits are more common in the Lowland and coastal areas.

Answer

A. Laterite

Answer

B. Alluvium

Answer

D. Sedimentary deposits

Question 7

Kerala Assembly Elections 2026 were held on:‌​‍

Accepted Answer

9 April 2026 — Polling for 140 seats was held on 9 April 2026. ‌​‍Counting is scheduled for 4 May 2026.

Answer

2 April 2026

Answer

16 April 2026

Answer

23 April 2026

Question 8

In situ conservation:‌​‍

Accepted Answer

National parks, sanctuaries, biosphere reserves — Protect species in natural habitat. ‌​‍Ex situ: zoo, botanical garden, seed bank, cryopreservation, tissue culture.

Answer

Botanical garden

Answer

Seed bank

Answer

Zoo

Question 9

Lucas test distinguishes alcohols by:

Accepted Answer

Rate of cloudiness with Lucas reagent (conc. HCl + ZnCl₂): 3°<1 min, 2° ~5 min, 1° no rxn at RT — Tests 1°, 2°, 3° alcohols by cloudiness of alkyl chloride formed.

Answer

Colour

Answer

Smell

Answer

Boiling point

Question 10

Atal Setu length:‌​‍

Accepted Answer

21.8 km — 21.8 km.‌​‍

Answer

30 km

Answer

10 km

Answer

15 km

DCOA Mixed Practice Test #499