HSA Mixed Practice Test #457

Question 1

Highest tides occur at:‌​‍

Accepted Answer

Spring tides (new and full moon) — Sun and moon aligned (syzygy). ‌​‍Neap tides: quadrature (first/third quarter moon); smallest range.

Answer

Random

Answer

Neap

Answer

Noon

Question 2

The first woman Speaker of Lok Sabha, Meira Kumar, was elected from which constituency?‌​‍

Accepted Answer

Sasaram — Meira Kumar represented Sasaram, Bihar.‌​‍

Answer

Thoothukudi

Answer

Indore

Answer

Amaravati

Question 3

Second law of thermodynamics:‌​‍

Accepted Answer

Entropy of universe tends to increase — ΔS_universe ≥ 0. Third law: entropy of perfect crystal at 0 K is zero.‌​‍

Answer

Heat flows cold to hot

Answer

Energy conserved

Answer

Absolute zero achievable

Question 4

Aryabhata, the mathematician-astronomer who calculated the value of pi and proposed Earth's rotation, lived during the:‌​‍

Accepted Answer

Gupta period — Aryabhata (b. 476 CE) flourished during the Gupta age.‌​‍

Answer

Chola period

Answer

Delhi Sultanate

Answer

Mauryan period

Question 5

CJI can be removed by:‌​‍

Accepted Answer

Impeachment by Parliament — Impeachment process in Parliament on grounds of proved misbehaviour.‌​‍

Answer

SC

Answer

PM

Answer

President

Question 6

'What a beautiful day!' is:‌​‍

Accepted Answer

Exclamatory — Exclamatory sentence.‌​‍

Answer

Imperative

Answer

Assertive

Answer

Interrogative

Question 7

The age of Earth is estimated at:‌​‍

Accepted Answer

~4.54 billion years — Radiometric dating of meteorites places Earth's age at 4.54 ± 0.05 Ga.‌​‍

Answer

~1 billion years

Answer

~10 billion years

Answer

~100 million years

Question 8

Which structural feature is essential for the antibacterial activity of sulfonamides, acting as a para-aminobenzoic acid (PABA) analog?

Accepted Answer

A. The presence of a primary amino group (-NH2) at the para position to the sulfonyl group. — Sulfonamides exert their antibacterial effect by mimicking PABA, which is a substrate for bacterial dihydropteroate synthase. The primary amino group at the para position to the sulfonyl group is crucial for this competitive inhibition, blocking bacterial folic acid synthesis. Other modifications would typically reduce or abolish activity.

Answer

B. A secondary amino group (-NHR) at the meta position to the sulfonyl group.

Answer

C. A carboxylic acid group (-COOH) attached to the benzene ring.

Answer

D. An alkyl group attached to the sulfonyl nitrogen.

Question 9

Kerala's first Rajya Sabha member:

Accepted Answer

V.K. Krishna Menon — V.K. Krishna Menon.

Answer

K.R. Narayanan

Answer

Panampilli Govinda Menon

Answer

V.P. Nayar

Question 10

A journal named 'Deepika' was started by:‌​‍

Accepted Answer

Fr. Heras — Nasrani Deepika (1887, oldest Malayalam newspaper) was started by Catholic priests at Mannanam — founder credited variously, including Fr. ‌​‍Nidhirickal Mani Kathanar.

Answer

Vakkom Maulavi

Answer

Chattampi Swamikal

Answer

Mother Teresa

HSA Mixed Practice Test #457