DCOA Mixed Practice Test #16

Question 1

Dipole moment of CO₂:‌​‍

Accepted Answer

Zero (linear symmetric) — Linear O=C=O; two equal and opposite bond dipoles cancel. H₂O non-zero (bent).‌​‍

Answer

Non-zero

Answer

Depends on T

Answer

Very high

Question 2

Vaikunta Swamikal's social reform movement was called:

Accepted Answer

Samatva Samajam — Ayya Vaikunda Swamikal founded Samatva Samajam in 1836.

Answer

Sree Narayana Dharma Paripalana Yogam

Answer

Sadhujana Paripalana Sangham

Answer

Atmavidya Sangham

Question 3

Hydrogen peroxide has the formula:‌​‍

Accepted Answer

H₂O₂ — H₂O₂ — used as antiseptic and bleaching agent.‌​‍

Answer

H₂O

Answer

HO₂

Answer

HO

Question 4

Mahakumbh 2025:‌​‍

Accepted Answer

Prayagraj Jan-Feb — Prayagraj Mahakumbh Jan-Feb 2025.‌​‍

Answer

Nasik

Answer

Ujjain

Answer

Haridwar

Question 5

Which natural polymer is extracted from latex of Hevea brasiliensis?‌​‍

Accepted Answer

Natural rubber — Hevea brasiliensis (rubber tree) is the main source of natural rubber latex.‌​‍

Answer

Polyester

Answer

Nylon

Answer

Silk

Question 6

Primary wave (P-wave) type:

Accepted Answer

Longitudinal — Compressional, fastest.

Answer

Transverse

Answer

Surface

Answer

Rayleigh

Question 7

A school counselor notices that a 16-year-old often isolates themselves after conflicts with peers. The counselor suspects this is due to the adolescent's developing sense of self and vulnerability. Which concept best describes this scenario?

Accepted Answer

A. Personal Fable (Elkind) — The Personal Fable (Elkind) refers to adolescents' belief that their experiences and feelings are unique and misunderstood, leading to isolation after peer conflicts. Cognitive dissonance involves mental discomfort from conflicting beliefs, self-efficacy is about confidence in abilities, and learned helplessness is a passive resignation to failure.

Answer

B. Cognitive Dissonance (Festinger)

Answer

C. Self-Efficacy (Bandura)

Answer

D. Learned Helplessness (Seligman)

Question 8

In the synthesis of aspirin (acetylsalicylic acid), which of the following reagents is used for the acetylation step?

Accepted Answer

A. Acetic anhydride — Acetic anhydride is commonly used in the acetylation of salicylic acid to form aspirin due to its efficiency and cost-effectiveness. Acetyl chloride is more reactive but less practical for industrial synthesis. Ethanol and sodium hydroxide are not used in the acetylation step.

Answer

B. Acetyl chloride

Answer

C. Ethanol

Answer

D. Sodium hydroxide

Question 9

'Sadhu Jana Paripalana Sangham' was founded by:‌​‍

Accepted Answer

Ayyankali — Ayyankali founded SJPS in 1907 for Dalit upliftment in Travancore.‌​‍

Answer

A.K. Gopalan

Answer

Sree Narayana Guru

Answer

Vakkom Maulavi

Question 10

The ancient port of Muziris is identified with the modern-day area near:‌​‍

Accepted Answer

Kodungallur — Muziris, the famous ancient port that traded with Rome and Greece, is identified with the area near modern Kodungallur (Cranganore) in Thrissur district.‌​‍

Answer

Kochi

Answer

Kozhikode

Answer

Kollam

DCOA Mixed Practice Test #16