HSA Mixed Practice Test #566

Question 1

Tilak imprisoned in:‌​‍

Accepted Answer

Mandalay — Mandalay, Burma (1908-1914).‌​‍

Answer

Kalapani

Answer

Delhi

Answer

Andaman

Question 2

ELISA is used to detect:

Accepted Answer

Antigen or antibody (immunoassay) — Enzyme-Linked Immunosorbent Assay. HIV test, pregnancy test. Colour change indicates presence.

Answer

DNA

Answer

Enzymes

Answer

Salts

Question 3

The Right to Education, making free and compulsory education a fundamental right for 6–14 years, became effective in:

Accepted Answer

2010 — RTE Act 2009 came into effect on 1 April 2010 under Article 21A.

Answer

2005

Answer

2014

Answer

2020

Question 4

Placenta:‌​‍

Accepted Answer

Both — Nutrient + waste exchange, hormones.‌​‍

Answer

None of these

Answer

Nutrient exchange fetus-mother

Answer

Waste

Question 5

Complex [Ni(CN)₄]²⁻ geometry:‌​‍

Accepted Answer

Square planar (dsp² hybridisation, low-spin) — Ni²⁺ is d⁸. ‌​‍Strong field CN⁻ pairs up electrons → square planar. Tetrahedral in [NiCl₄]²⁻ (weak field).

Answer

Linear

Answer

Octahedral

Answer

Tetrahedral

Question 6

Metamorphic: slate is derived from:‌​‍

Accepted Answer

Shale — Low-grade metamorphism. ‌​‍Marble from limestone. Quartzite from sandstone. ‌​‍Gneiss from granite.

Answer

Granite

Answer

Basalt

Answer

Limestone

Question 7

Sucrose (table sugar) is:

Accepted Answer

Disaccharide of glucose + fructose (α-1,β-2 glycosidic) — Non-reducing sugar (both anomeric C involved in bond). Hydrolysis (invertase) gives invert sugar.

Answer

Monosaccharide

Answer

Polysaccharide

Answer

Amino acid

Question 8

A mutation is:‌​‍

Accepted Answer

A heritable change in DNA sequence — Mutations are changes in DNA passed to daughter cells/offspring.‌​‍

Answer

Any body movement

Answer

Viral infection

Answer

Cell death

Question 9

The Cripps Mission (March 1942) offered:‌​‍

Accepted Answer

Dominion status after the war with right to secede — Stafford Cripps; rejected by Congress (Gandhi: 'post-dated cheque on a crashing bank') and League. ‌​‍Failure triggered Quit India.

Answer

Federation

Answer

Immediate independence

Answer

Partition only

Question 10

A teacher is preparing a microteaching lesson on the topic of photosynthesis. Which of the following teaching aids would best support the explanation of the process?

Accepted Answer

C. A video showing the process in real-time — The correct answer is C. A video showing the process in real-time. While a textbook chapter (A) provides detailed information, a diagram (B) offers a static visual, and a physical model (D) allows for tactile interaction, a video (C) dynamically illustrates the process, making it easier for students to understand the complex interactions involved in photosynthesis.

Answer

A. A detailed textbook chapter

Answer

B. A simple diagram of a plant cell

Answer

D. A physical model of a leaf

HSA Mixed Practice Test #566