VFA Mixed Practice Test #540

Question 1

Kasaragod known for:

Accepted Answer

Multiple languages — 7+ languages spoken. Northernmost district.

Answer

Backwaters

Answer

Theyyam

Answer

Fort

Question 2

First law of thermodynamics is statement of:‌​‍

Accepted Answer

Conservation of energy (dQ = dU + dW) — Energy is conserved; heat added = increase in internal energy + work done by system. ‌​‍Sign conventions important.

Answer

Heat flow direction

Answer

Entropy

Answer

Absolute zero

Question 3

India's only silver at Paris 2024:‌​‍

Accepted Answer

Neeraj Chopra (javelin) — Neeraj Chopra silver in javelin at Paris 2024.‌​‍

Answer

Aman Sehrawat

Answer

Manu Bhaker

Answer

PV Sindhu

Question 4

The Ashoka Chakra (military decoration) is awarded for:‌​‍

Accepted Answer

Bravery in peacetime — Ashoka Chakra is India's highest peacetime gallantry award. ‌​‍Param Vir Chakra is for wartime.

Answer

Sports excellence

Answer

Bravery in wartime

Answer

Academic achievement

Question 5

World's first Gen AI law:‌​‍

Accepted Answer

EU AI Act 2024 — EU AI Act — first comprehensive regulation.‌​‍

Answer

India

Answer

US

Answer

China

Question 6

Short-day plants flower in:‌​‍

Accepted Answer

Short day — Chrysanthemum, rice.‌​‍

Answer

All year

Answer

Winter only

Answer

Long day

Question 7

In an experiment demonstrating the photoelectric effect, it is observed that electrons are only ejected from a metal surface if the incident light's frequency exceeds a specific threshold, irrespective of the light's intensity. Furthermore, for frequencies above this threshold, increasing the light's intensity increases the *number* of ejected electrons, but not their *maximum kinetic energy*. This set of observations provides strong evidence for which of the following?

Accepted Answer

C. The quantum nature of light, where energy is transferred in discrete packets called photons. — Option C accurately reflects that the quantum nature of light, specifically the photon concept (E=hν), is required to explain the observed phenomena of the photoelectric effect. The existence of a threshold frequency implies that energy is transferred in discrete packets (photons), each needing sufficient energy to overcome the metal's work function. Classical wave theory (Option B) fails to explain the threshold frequency and predicts that electron kinetic energy should increase with light intensity, contradicting observations. Options A and D are unrelated or do not provide the fundamental e

Answer

A. The inverse square law governing the intensity of light.

Answer

B. The classical wave theory of light, predicting continuous energy transfer to electrons.

Answer

D. The principle of conservation of momentum in light-matter interactions.

Question 8

Marayoor dolmens:‌​‍

Accepted Answer

Idukki — Muniyara — Idukki.‌​‍

Answer

Thrissur

Answer

Palakkad

Answer

Wayanad

Question 9

pH of stomach acid:‌​‍

Accepted Answer

1-2 — Stomach HCl has pH ~1-2 (strongly acidic).‌​‍

Answer

5-6

Answer

7

Answer

9-10

Question 10

The biochemical pathway involving the conversion of glucose to pyruvate is known as:

Accepted Answer

B. Glycolysis — Glycolysis is the metabolic pathway that breaks down glucose into pyruvate, producing ATP and NADH. Glycogenesis forms glycogen, gluconeogenesis synthesizes glucose from non-carbohydrate sources, and glycogenolysis breaks down glycogen into glucose.

Answer

A. Glycogenesis

Answer

C. Gluconeogenesis

Answer

D. Glycogenolysis

VFA Mixed Practice Test #540