VFA Mixed Practice Test #531

Question 1

DNA fingerprinting by:‌​‍

Accepted Answer

Alec Jeffreys — Alec Jeffreys (1984).‌​‍

Answer

Crick

Answer

Watson

Answer

Sanger

Question 2

Sphygmomanometer measures:

Accepted Answer

Blood pressure — Blood pressure.

Answer

Temperature

Answer

Blood sugar

Answer

Heart rate

Question 3

Kerala Women's Commission:‌​‍

Accepted Answer

1996 — 1996.‌​‍

Answer

2005

Answer

2000

Answer

1990

Question 4

Pulmonary artery carries:

Accepted Answer

Deoxygenated blood — Deoxygenated blood from heart to lungs — only artery with deoxygenated blood.

Answer

Oxygenated blood

Answer

Mixed

Answer

Lymph

Question 5

Regular handwashing is considered a cornerstone of personal hygiene and infection control. What is the primary reason for its effectiveness in preventing the spread of diseases?

Accepted Answer

A. It physically removes transient microbes and dirt. — The primary mechanism of handwashing is the mechanical removal of transient microorganisms and dirt from the skin surface through friction and rinsing. It does not sterilize the skin, create a lasting chemical barrier, or aim to kill all resident flora, which are often beneficial.

Answer

B. It sterilizes the skin surface completely.

Answer

C. It creates a protective chemical barrier on the skin.

Answer

D. It kills all resident flora on the hands.

Question 6

Mahakumbh 2025:‌​‍

Accepted Answer

Prayagraj Jan-Feb — Prayagraj Mahakumbh Jan-Feb 2025.‌​‍

Answer

Nasik

Answer

Ujjain

Answer

Haridwar

Question 7

A special phenomenon seen only in the Arabian Sea (off Kerala coast):‌​‍

Accepted Answer

Chakara — Chakara — a unique sea phenomenon off Kerala coast in monsoon, large fish gathering due to mud bank formation.‌​‍

Answer

Tides

Answer

Coral Reefs

Answer

Loo

Question 8

The speed of sound in air at 20 °C is approximately:‌​‍

Accepted Answer

343 m/s — In dry air at 20 °C, sound travels ~343 m/s.‌​‍

Answer

150 m/s

Answer

1500 m/s

Answer

3 × 10⁸ m/s

Question 9

Under the Right to Education Act, 2009, what is the primary responsibility of a private unaided school regarding the admission of children from weaker sections and disadvantaged groups?

Accepted Answer

B. Reserve 25% of seats for these children at the entry level and provide free education. — The RTE Act mandates that private unaided schools must reserve 25% of the seats at the entry level (Class I or pre-primary) for children belonging to weaker sections and disadvantaged groups. These children are to be provided free and compulsory elementary education, with the state reimbursing the schools for the expenses. Other options present incorrect percentages, scope, or mechanisms.

Answer

A. Reserve 15% of seats for these children at all entry levels.

Answer

C. Provide free education to all children from these groups admitted through a lottery system.

Answer

D. Offer scholarships to 25% of admitted students from economically weaker sections.

Question 10

A primary school teacher is planning to introduce the concept of 'states of matter' (solid, liquid, gas) to her students. Which type of teaching aid would be most effective for initial engagement and concrete understanding?

Accepted Answer

C. Real-life objects like ice, water, and steam (carefully demonstrated). — For primary students, concrete experiences with real objects are crucial for understanding abstract concepts like states of matter. While other options have their uses, direct observation and manipulation of real examples provide the most foundational and memorable learning experience at this stage.

Answer

A. A detailed chart displaying the molecular structure of each state.

Answer

B. A video animation illustrating phase changes at a molecular level.

Answer

D. A worksheet with definitions and examples of each state.

VFA Mixed Practice Test #531