HSA Mixed Practice Test #316

Question 1

Baking soda chemical name:

Accepted Answer

Sodium bicarbonate — NaHCO₃ — Sodium bicarbonate (Sodium hydrogen carbonate).

Answer

Sodium carbonate

Answer

Sodium chloride

Answer

Sodium hydroxide

Question 2

All the following are noble metals EXCEPT:‌​‍

Accepted Answer

Mercury — Gold, silver and platinum are noble metals; mercury is a transition metal (liquid at room temperature).‌​‍

Answer

Gold

Answer

Platinum

Answer

Silver

Question 3

Which of the following is a non-protein nitrogenous compound excreted in urine?

Accepted Answer

B. Urea — Urea (B) is a primary non-protein nitrogenous waste product excreted in urine. Glucose (A) is not nitrogenous; hemoglobin (C) and bilirubin (D) are protein-bound or conjugated metabolites, not typical NPN compounds.

Answer

A. Glucose

Answer

C. Hemoglobin

Answer

D. Bilirubin

Question 4

In a remote island ecosystem, a population of a particular bird species exhibits varying beak sizes. A sudden and prolonged drought drastically reduces the availability of small, soft seeds, leaving primarily large, hard seeds as the food source. Over several generations, the average beak size of the bird population is observed to significantly increase. Which of the following evolutionary mechanisms best explains this change in the bird population?

Accepted Answer

C. Natural selection — This scenario describes natural selection. The drought acts as a selective pressure, favoring birds with larger beaks that are better adapted to crack the available large, hard seeds. These birds are more likely to survive, reproduce, and pass on their genes, leading to an increase in the average beak size over generations. Genetic drift involves random changes in allele frequencies, gene flow is the movement of alleles between populations, and mutation introduces new alleles, but none of these mechanisms primarily explain the directed change in response to an environmental pressure as effecti

Answer

A. Genetic drift

Answer

B. Gene flow

Answer

D. Mutation

Question 5

EWS 10% reservation upheld by SC (2022):‌​‍

Accepted Answer

3-2 majority — 3-2 majority in Janhit Abhiyan.‌​‍

Answer

7-0

Answer

5-0

Answer

Full bench

Question 6

National Emergency under Article:‌​‍

Accepted Answer

352 — Article 352.‌​‍

Answer

356

Answer

365

Answer

360

Question 7

A High Court judge holds office till the age of:‌​‍

Accepted Answer

62 — Article 217: HC judges retire at 62.‌​‍

Answer

60

Answer

65

Answer

58

Question 8

Compounds with the same molecular formula but different structures are called:‌​‍

Accepted Answer

Isomers — Isomerism: same formula, different arrangement (structural or stereo).‌​‍

Answer

Isotopes

Answer

Isobars

Answer

Allotropes

Question 9

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 10

Sakthan Thampuran ruled:‌​‍

Accepted Answer

Cochin — Rama Varma (Sakthan Thampuran) ruled Cochin (1790-1805). ‌​‍Introduced Thrissur Pooram.

Answer

Travancore

Answer

Malabar

Answer

Calicut

HSA Mixed Practice Test #316