General Science Mixed Practice — MCQs with Answers (Set 3)

Sound travels to the cliff and back in 5 seconds, covering 340 x 5 = 1700 m total. The one-way distance to the cliff is half that, 850 m.

Most mammals go through an oestrus cycle, where the female is fertile only during a short “heat” period.

Cows, rats and tigers are non-primate mammals, so all of them show this oestrus cycle pattern.

Primates, including monkeys, apes and humans, do not show an oestrus cycle at all. Instead, they show a menstrual cycle, where the uterine lining sheds as bleeding if pregnancy does not occur.

So monkeys are the odd one out here, making option (b) the answer.

Paper testing checks several different kinds of physical properties, and all four listed ones are real, standard categories.

Mechanical and strength tests measure things like tensile strength, tear resistance, and folding endurance.

Surface tests measure roughness, smoothness, and friction, since these affect printing and coating quality.

Optical tests measure brightness, opacity, colour, and gloss, since these decide how paper looks and prints.

Permeability tests measure how well air, water, or oil pass through the paper, which affects absorbency and packaging use.

So all four properties are genuinely tested during paper manufacture, making option (d) correct.

Vermicompost is rich in nutrients, so statement 1 is true. Crop rotation helps manage pests, so statement 3 is true. Organic farming does use bio-fertilisers and bio-pesticides, so statement 2 is false.

Dr. Homi Bhabha moved the Tata Memorial Centre under the Department of Atomic Energy in 1962, foreseeing radiation’s growing role in cancer treatment.

Ayushman Bharat, India’s national health insurance scheme covering over 500 million people, has adopted NCG’s uniform treatment guidelines.

NCG was founded in 2012 with just 17 founding member centres, growing to over 300 today.

The answer is a network of cancer centres, research institutes and patient groups across India. It is not one hospital chain or an insurer. Its goal is uniform standards of cancer care. Memory hook: network, not hospital.

The correct answer is Public Health Emergency Operations Centre (PHEOC). News Arena reports the NCDC activated it to support the NJORT. The IDSP option is wrong because IDSP is the surveillance programme that supports the response, not the centre that was activated. The vector-borne disease programme option is wrong because it is not named as activated. The CDSCO option is wrong because it regulates drugs. Memory hook: emergency centre, activated.

Five institutes are involved: ICMR-NIE Chennai, ICMR-NIVCR Puducherry, ICMR-NIV Pune, ICMR-NIPCR Hyderabad, and ICAR-NIVEDI Bengaluru.

The correct answer is Gujarat and Rajasthan. Business Standard reports the Centre sent the team to these two states after Gujarat reported 35 confirmed cases and Rajasthan reported three. The Maharashtra and Telangana option is wrong because no cases led to a team there. The Bihar and Odisha option is wrong for the same reason. The Andhra Pradesh and Karnataka option is wrong because the 2026 cases were in Gujarat and Rajasthan. Memory hook: G and R for the NJORT.

PMNDP gives free dialysis to BPL patients at government district hospitals, under the National Health Mission.

Hypertension was the most common characteristic among CKD patients in the SEEK study, present in 64.5% of cases.

Only 7.9% of people found to have CKD in the SEEK study already knew they had the condition.

The answer is the SEEK study’s overall CKD prevalence, 17.2% of the people it screened. Only 7.9% of those with CKD knew they had it. Memory hook: 17 found, 8 aware.

Borophene was first synthesised in 2015, on a silver substrate using molecular beam epitaxy, after being theoretically predicted decades earlier.

Borophene forms a durable protective tribofilm, containing iron oxides, carbonaceous species, and boron-based compounds, that reduces shear stress and improves load-bearing capacity.

The answer is to act as a lubricant additive. PIB reported the first demonstration of borophene as a lubricant additive on 22 July 2026. Adding just 0.1 wt.% cut friction by about 42% in castor oil. Memory hook: 0.1 in, 42 off.

LFOF’s recommendations include HFSS taxation, front-of-pack nutrition labelling, school food environments, and marketing regulation for unhealthy food aimed at children.

Qdenga is given as two doses of 0.5 ml each, at an interval of three months (0 and 3 months).

Qdenga had already been approved in 42 countries, and holds WHO prequalification, before India’s 21 July 2026 approval.

Qdenga is approved for people aged 4 to 60 years, given as two 0.5 ml doses three months apart.

Indonesia approved Qdenga in August 2022, ahead of the European Union’s approval in December 2022.