VFA Mixed Practice Test #508

Question 1

Benzene exhibits:‌​‍

Accepted Answer

Electrophilic substitution mainly (aromaticity) — 6 delocalised π electrons; 4n+2 (Hückel). ‌​‍Friedel-Crafts, nitration, sulphonation, halogenation.

Answer

Only addition

Answer

Only combustion

Answer

Only free-radical addition

Question 2

In which year was Pathanamthitta district formed?‌​‍

Accepted Answer

1982 — 1 November 1982.

Answer

1956

Answer

1970

Answer

1990

Question 3

Fort Kochi:‌​‍

Accepted Answer

Ernakulam — Kochi's old European quarter.‌​‍

Answer

Kozhikode

Answer

Kollam

Answer

TVM

Question 4

Who was the first recipient of the Jnanpith Award?‌​‍

Accepted Answer

G. Sankara Kurup (Malayalam, 1965) — For 'Odakkuzhal'. ‌​‍Malayalam's first Jnanpith. Other Malayalam Jnanpith: SK Pottekkatt, Thakazhi, MT Vasudevan Nair, ONV Kurup, Akkitham.

Answer

Premchand

Answer

Tagore (Nobel not Jnanpith)

Answer

Nirala

Question 5

Fiscal deficit is:‌​‍

Accepted Answer

Total expenditure - total revenue (excluding borrowings) — Fiscal deficit = total expenditure − total non-borrowing receipts. ‌​‍Measures government's borrowing need.

Answer

Capital expenditure only

Answer

Total expenditure - total revenue

Answer

Revenue expenditure - revenue receipts

Question 6

Calcium deficiency affects:‌​‍

Accepted Answer

Bones and teeth — Weak bones, osteoporosis.‌​‍

Answer

Eyes

Answer

Liver

Answer

Lungs

Question 7

Which planet has the largest number of moons?‌​‍

Accepted Answer

Saturn — Saturn has 146+ known moons (as of 2024), surpassing Jupiter.‌​‍

Answer

Jupiter

Answer

Uranus

Answer

Neptune

Question 8

In the context of social change in Kerala, the rapid urbanization and migration of youth to cities often lead to specific community health challenges. Which of the following is a direct consequence of such demographic shifts on community health?

Accepted Answer

C. Increased psychosocial stress, lifestyle diseases, and strain on urban health infrastructure. — Rapid urbanization and migration frequently result in increased psychosocial stress due to changing social dynamics, a rise in lifestyle-related non-communicable diseases from sedentary habits and dietary changes, and significant strain on urban health infrastructure. While sanitation might improve in some areas, lifestyle diseases are a major concern. Traditional family support often weakens, and rural primary healthcare can suffer from a lack of trained personnel who migrate to urban centers.

Answer

A. Decreased prevalence of non-communicable diseases due to improved sanitation.

Answer

B. Enhanced traditional family support systems for the elderly and children.

Answer

D. Greater access to primary healthcare services in rural areas due to reduced population density.

Question 9

Which of the following represents the identity matrix I of order 3?‌​‍

Accepted Answer

[[1,0,0],[0,1,0],[0,0,1]] — AI = IA = A for any compatible A. Inverse: A·A⁻¹ = I.‌​‍

Answer

[[1,1,1],[1,1,1],[1,1,1]]

Answer

[[0,0,0]]

Answer

[[2,0,0]]

Question 10

Barium sulfate is widely used as a radiocontrast agent for imaging the gastrointestinal tract. Despite the inherent toxicity of soluble barium compounds, barium sulfate is safe for this application due to which key chemical property?

Accepted Answer

C. Its extreme insolubility in water and biological fluids. — Barium sulfate is safe as a contrast agent because it is highly insoluble in water and biological fluids. This insolubility prevents the absorption of toxic barium ions into the bloodstream from the gastrointestinal tract. If it were soluble, the barium ions would be absorbed and cause significant toxicity.

Answer

A. Its high solubility in water and biological fluids.

Answer

B. Its rapid absorption into the systemic circulation from the GI tract.

Answer

D. Its strong chelating properties with heavy metals.

VFA Mixed Practice Test #508