VFA Mixed Practice Test #13

Question 1

Molar conductivity Λm variation with dilution (strong electrolyte):‌​‍

Accepted Answer

Increases linearly approaching Λm° at infinite dilution — Kohlrausch law: Λm = Λm° - A√c. ‌​‍Weak electrolytes: not linear; degree of dissociation grows.

Answer

Decreases

Answer

Constant

Answer

Exponential

Question 2

The device used to measure electric current is:‌​‍

Accepted Answer

Ammeter — Ammeter measures current (connected in series). ‌​‍Voltmeter measures voltage (connected in parallel).

Answer

Voltmeter

Answer

Galvanometer

Answer

Ohmmeter

Question 3

Pascal's law applies to:

Accepted Answer

Enclosed fluid at rest — pressure applied is transmitted equally in all directions — Basis of hydraulic press, brakes. Gain in force = ratio of areas.

Answer

Solids

Answer

Only gases

Answer

Moving fluids

Question 4

A mineral extensively found in Kerala, primary ore of thorium, cerium and lanthanum:

Accepted Answer

Monazite — Kerala's black sand beaches are rich in monazite.

Answer

Ilmenite

Answer

Zircon

Answer

Sillimanite

Question 5

Made-in-India helicopter:‌​‍

Accepted Answer

Dhruv — HAL Dhruv (ALH — Advanced Light Helicopter).‌​‍

Answer

Akash

Answer

HAL Tejas

Answer

Pinaka

Question 6

Natural fibres include:

Accepted Answer

Cotton (cellulose), Silk (protein), Wool (protein), Jute — Synthetic: nylon, polyester, acrylic. Regenerated (semi-synthetic): rayon, viscose. India leader in cotton and jute.

Answer

Nylon

Answer

Polyester

Answer

Acrylic

Question 7

Which Kerala lake is the deepest freshwater lake in the state?‌​‍

Accepted Answer

Sasthamkotta — Sasthamkotta Lake in Kollam is the largest freshwater lake in Kerala and one of the deepest.‌​‍

Answer

Vembanad

Answer

Manasarovar

Answer

Ashtamudi

Question 8

Taiwan's political status:

Accepted Answer

De facto independent, claimed by PRC; recognised by ~13 countries — Taiwan (ROC) self-governing since 1949. Most countries recognise PRC (One China policy). USA maintains unofficial relations + Taiwan Relations Act.

Answer

Recognised country by most

Answer

UN member

Answer

China's province

Question 9

Aluminium resists corrosion because it forms a:‌​‍

Accepted Answer

Protective layer of Al₂O₃ oxide — Aluminium's aluminium oxide layer (a few nm thick) is self-protecting.‌​‍

Answer

Sulphide coating

Answer

Layer of silver

Answer

Carbonate film

Question 10

A newborn is assessed at 5 minutes after birth with the following findings: heart rate 110 bpm, weak cry, some flexion of extremities, grimace when stimulated, body pink with blue extremities. What is the APGAR score for this newborn?

Accepted Answer

A. 6 — The APGAR score is calculated as follows: Heart Rate (>100 bpm = 2, so 110 bpm = 2); Respiratory Effort (Weak cry = 1); Muscle Tone (Some flexion = 1); Reflex Irritability (Grimace = 1); Color (Body pink, blue extremities = 1). Adding these scores (2+1+1+1+1) results in a total APGAR score of 6. This score indicates that the newborn needs some observation or intervention.

Answer

B. 7

Answer

C. 8

Answer

D. 9

VFA Mixed Practice Test #13