VFA Mixed Practice Test #331

Question 1

The modern periodic table organizes elements based on increasing atomic number, displaying clear periodic trends in properties. Considering the general trends for atomic radius and electronegativity, which of the following accurately identifies the element expected to have the largest atomic radius and the element expected to have the highest electronegativity among all stable elements?

Accepted Answer

B. Largest Atomic Radius: Francium (Fr); Highest Electronegativity: Fluorine (F). — Atomic radius generally increases down a group and decreases across a period, making Francium (Fr), located at the bottom-left, the element with the largest atomic radius. Electronegativity generally increases across a period and decreases down a group, with Fluorine (F), found at the top-right (excluding noble gases which typically do not have defined electronegativity values), having the highest electronegativity. Options A, C, and D incorrectly identify elements for these extreme properties or misstate the periodic trends.

Answer

A. Largest Atomic Radius: Helium (He); Highest Electronegativity: Francium (Fr).

Answer

C. Largest Atomic Radius: Chlorine (Cl); Highest Electronegativity: Cesium (Cs).

Answer

D. Largest Atomic Radius: Radon (Rn); Highest Electronegativity: Oxygen (O).

Question 2

Which of these has the shortest wavelength among electromagnetic waves?‌​‍

Accepted Answer

Gamma rays — Gamma rays (< 0.01 nm) have the shortest wavelength / highest frequency.‌​‍

Answer

Radio

Answer

Microwave

Answer

Visible

Question 3

Which metal is least reactive among these?

Accepted Answer

Gold — Gold (and platinum) is among the least reactive — remains free in nature.

Answer

Potassium

Answer

Sodium

Answer

Iron

Question 4

World AIDS Day:‌​‍

Accepted Answer

1 Dec — 1 December.‌​‍

Answer

1 Nov

Answer

10 Dec

Answer

24 Oct

Question 5

Kochi Water Metro launched:

Accepted Answer

2023 — 25 April 2023 — first Water Metro in India.

Answer

2022

Answer

2024

Answer

2025

Question 6

Nari Shakti implementation:‌​‍

Accepted Answer

After delimitation — After next delimitation exercise.‌​‍

Answer

Never

Answer

2030

Answer

Immediate

Question 7

During a growth monitoring session at an Anganwadi center, a 12-month-old child is found to have a weight-for-height Z-score of -3 and a history of diarrhea in the past month. According to IMNCI, which of the following is the MOST appropriate immediate action?

Accepted Answer

A. Provide high-energy therapeutic milk and refer to a nutrition rehabilitation center — A weight-for-height Z-score of -3 indicates severe acute malnutrition (SAM), requiring immediate referral to a nutrition rehabilitation program for therapeutic feeding. Option B is for iron-deficiency anemia; Option C is for vitamin A deficiency prevention; Option D is for infants under 6 months with normal growth.

Answer

B. Prescribe iron supplementation and advise dietary modifications

Answer

C. Administer vitamin A supplementation and monitor weight weekly

Answer

D. Recommend exclusive breastfeeding and weaning foods

Question 8

Primary consumers are:‌​‍

Accepted Answer

Herbivores — Plant-eaters.‌​‍

Answer

Carnivores

Answer

Producers

Answer

Omnivores

Question 9

Earth's satellite:

Accepted Answer

Moon — Moon — only natural satellite.

Answer

Phobos

Answer

Titan

Answer

Europa

Question 10

Blood volume in adult:

Accepted Answer

4-5L — About 5 litres.

Answer

2L

Answer

6-7L

Answer

10L

VFA Mixed Practice Test #331