LDC Mixed Practice Test #900

Question 1

Gas exchange in the human respiratory system primarily occurs in which of the following structures?

Accepted Answer

D. Alveoli — Alveoli are tiny air sacs in the lungs with thin walls, perfectly adapted for the efficient exchange of oxygen into the blood and carbon dioxide out of the blood. The trachea, bronchi, and larynx are part of the conducting zone, responsible for air transport, warming, and filtering, not gas exchange.

Answer

A. Trachea

Answer

B. Bronchi

Answer

C. Larynx

Question 2

Identify the part of speech of the underlined word: 'He sat under the tree.' ('under'):

Accepted Answer

Preposition — 'Under' shows relation between 'sat' and 'tree' → preposition.

Answer

Noun

Answer

Adverb

Answer

Conjunction

Question 3

Monday + 72 days = ?

Accepted Answer

Wednesday — 72÷7 = 10 weeks + 2 days. Monday + 2 = Wednesday.

Answer

Monday

Answer

Tuesday

Answer

Thursday

Question 4

Choose the correct form: 'Neither of the boys ___ present.'‌​‍

Accepted Answer

is — 'Neither' is singular → singular verb.‌​‍

Answer

be

Answer

are

Answer

were

Question 5

Sovereign means:‌​‍

Accepted Answer

Free from external control — No external authority above India.‌​‍

Answer

Dependent

Answer

Following religion

Answer

Ruled by king

Question 6

The NCERT Class 11 Sociology book 'Understanding Sociology' covers:‌​‍

Accepted Answer

Sociological theories, methods, institutions (family, education, economy, polity, religion) — Standard intro sociology curriculum — theories, research, and major social institutions.‌​‍

Answer

Only Indian sociology

Answer

Only statistics

Answer

Only politics

Question 7

India overtook ___ as 4th largest economy in 2025:‌​‍

Accepted Answer

Japan — India overtook Japan in 2025 as 4th largest (nominal GDP).‌​‍

Answer

France

Answer

Germany

Answer

UK

Question 8

The Crusades were fought from:‌​‍

Accepted Answer

1095-1291 — First Crusade 1095 (Pope Urban II); Fall of Acre 1291 ended Christian holdings. ‌​‍Series of 9 Crusades over 200 years.

Answer

1453-1522

Answer

1337-1453

Answer

1066-1200

Question 9

Kerala University:‌​‍

Accepted Answer

1937 (as Travancore Univ) — Renamed Kerala University in 1957.‌​‍

Answer

1960

Answer

1957

Answer

1947

Question 10

The Silent Valley movement in Kerala stopped the proposed:‌​‍

Accepted Answer

Hydroelectric project — Silent Valley Hydroelectric Project was abandoned after public agitation; area became a National Park in 1984.‌​‍

Answer

Aluminium plant

Answer

Oil refinery

Answer

Coal mining

LDC Mixed Practice Test #900