LGS Mixed Practice Test #397

Question 1

Mean kinetic energy per molecule of ideal gas at absolute T is:

Accepted Answer

(3/2)kT — Equipartition: (1/2)kT per DOF. Monatomic gas has 3 translational DOF.

Answer

kT

Answer

(5/2)kT

Answer

RT

Question 2

If a number is divided by 7 and the quotient is 12 with remainder 3, the number is:

Accepted Answer

87 — Dividend = divisor × quotient + remainder = 7×12+3 = 87.

Answer

75

Answer

84

Answer

90

Question 3

The establishment of the first formal university in the princely state of Travancore marked a significant milestone in the history of higher education in Kerala. Which institution holds this distinction, laying the foundation for advanced learning in the region?

Accepted Answer

C. University of Travancore — The University of Travancore, established in 1937, was the first university in the region, initially focused on promoting research and the advancement of knowledge. It was later reorganized and renamed the University of Kerala. The other universities mentioned were established much later in the state's history.

Answer

A. University of Calicut

Answer

B. Mahatma Gandhi University

Answer

D. Cochin University of Science and Technology

Question 4

Who led the historic Vaikom Satyagraha (1924–25) for temple-entry rights?‌​‍

Accepted Answer

K. Kelappan and T. K. Madhavan — T. ‌​‍K. Madhavan and K. ‌​‍Kelappan spearheaded the Vaikom Satyagraha; Gandhi visited in 1925.

Answer

K. Ayyappan alone

Answer

C. Krishnan

Answer

K. P. Kesava Menon

Question 5

Year MGNREGA was fully implemented across Kerala:

Accepted Answer

01.04.2008 — MGNREGA achieved full-district coverage in Kerala on 1 April 2008.

Answer

02.02.2006

Answer

01.04.2007

Answer

None of the above

Question 6

Molarity and molality differ because:‌​‍

Accepted Answer

Molality uses kg of solvent (T-independent); molarity uses L of solution (T-dependent) — For colligative properties, molality preferred because volume changes with T.‌​‍

Answer

Molality uses mass%

Answer

They are same

Answer

Molarity uses kg of solvent

Question 7

A teacher wants to introduce a complex scientific concept, like the working of a human heart, to a class of 8th graders. Which of the following teaching aids would be MOST effective in ensuring clear understanding and retention among students, specifically focusing on the dynamic process of blood circulation?

Accepted Answer

D. An interactive digital simulation or video animation showing blood flow through the heart and body. — For understanding a dynamic process like blood circulation, an interactive digital simulation or video animation is most effective. It visually demonstrates the continuous flow and changes over time, which static charts or even 3D models cannot fully convey. Hands-on dissection focuses more on anatomy than the dynamic process itself.

Answer

A. A large, detailed wall chart depicting the anatomy of the heart.

Answer

B. A hands-on dissection of an animal heart.

Answer

C. A 3D model of the human heart with movable parts.

Question 8

A couple is seeking genetic counseling due to a family history of an autosomal recessive disorder. The father is identified as a carrier, while the mother has no family history of the disorder and genetic testing confirms she is not a carrier. What is the probability that their child will be affected by this specific autosomal recessive disorder?

Accepted Answer

A. 0% — For an autosomal recessive disorder to manifest, an individual must inherit two copies of the recessive allele (one from each parent). In this scenario, the father is a carrier (Aa) and the mother is not a carrier (AA). Therefore, any child will inherit a dominant 'A' allele from the mother, making it impossible for them to inherit two recessive 'a' alleles and thus be affected by the disorder.

Answer

B. 25%

Answer

C. 50%

Answer

D. 75%

Question 9

'Dry Ice' is the solid form of:‌​‍

Accepted Answer

Carbon dioxide — Dry ice = solid CO₂ (sublimes directly to gas).‌​‍

Answer

Sodium carbonate

Answer

Calcium sulphate

Answer

Water

Question 10

Chernobyl nuclear disaster occurred in:‌​‍

Accepted Answer

1986 — Chernobyl reactor 4 explosion 26 April 1986 (Ukrainian SSR). ‌​‍Worst nuclear accident in history; contributed to USSR's decline.

Answer

2011

Answer

1991

Answer

1979

LGS Mixed Practice Test #397