DCOA Mixed Practice Test #842

Question 1

Globalisation refers to:‌​‍

Accepted Answer

Intensification of worldwide social, economic, cultural, political connections — Globalisation includes trade, finance, migration, information, culture flows — connecting nations more intensively since 1990s.‌​‍

Answer

Only trade

Answer

Only immigration

Answer

Only internet

Question 2

An example of a vestigial organ in humans is:‌​‍

Accepted Answer

Appendix — Vermiform appendix is a vestigial organ — evolutionary remnant of caecum.‌​‍

Answer

Liver

Answer

Brain

Answer

Heart

Question 3

The functional group of a ketone is:

Accepted Answer

−C(=O)− in middle of chain — Ketones have carbonyl between two carbons (e.g., acetone CH₃COCH₃).

Answer

−CHO

Answer

−COOH

Answer

−NH₂

Question 4

Following an initial discussion, a science teacher provides students with various materials such as ice cubes, a hot plate, and thermometers. Students are then instructed to work in groups to observe and record the temperature changes as ice melts and water boils, documenting their findings. This activity exemplifies which phase of the 5E learning model?

Accepted Answer

C. Explore — The Explore phase is characterized by students actively investigating phenomena, collecting data, and engaging in hands-on experiences to build direct understanding. The activity described, where students conduct an experiment and record observations, directly aligns with the investigative and experiential nature of the Explore phase, allowing them to gather evidence before formal explanations.

Answer

A. Engage

Answer

B. Explain

Answer

D. Evaluate

Question 5

Haemophilia is a disorder of:

Accepted Answer

Blood clotting — Haemophilia is an X-linked recessive disorder impairing clotting factors VIII or IX.

Answer

Bones

Answer

Nervous system

Answer

Eyes

Question 6

A history teacher wants to make a lesson on ancient civilizations more interactive and engaging, moving beyond traditional textbook discussions. Which combination of teaching aids and ICT tools would be most effective for achieving this goal?

Accepted Answer

C. Integrating virtual reality (VR) tours of historical sites and interactive quizzes. — Virtual Reality (VR) tours offer immersive experiences, allowing students to 'visit' ancient sites and visualize historical contexts dynamically. Coupled with interactive quizzes, this approach significantly enhances engagement and provides a multi-sensory learning experience beyond passive observation, making the lesson highly interactive and memorable.

Answer

A. Relying solely on a detailed map and a timeline chart.

Answer

B. Using a documentary video and encouraging group discussions.

Answer

D. Distributing photocopies of primary source documents for individual reading.

Question 7

Cerebellum function:‌​‍

Accepted Answer

Balance, coordination — Motor coordination.‌​‍

Answer

Digestion

Answer

Breath

Answer

Thought

Question 8

D Gukesh World Chess Champion:‌​‍

Accepted Answer

2024 Dec — Beat Ding Liren, Singapore Dec 2024.‌​‍

Answer

2025

Answer

Lost

Answer

2023

Question 9

Molar mass of CO₂ is:‌​‍

Accepted Answer

44 g/mol — C(12) + 2×O(16) = 44 g/mol.‌​‍

Answer

46 g/mol

Answer

32 g/mol

Answer

28 g/mol

Question 10

CM Kerala:‌​‍

Accepted Answer

Pinarayi Vijayan — Pinarayi Vijayan.‌​‍

Answer

Oommen Chandy

Answer

Vijayan

Answer

Shashi Tharoor

DCOA Mixed Practice Test #842