KAS Prelims Mixed Practice Test #338

Question 1

Antonym of MUNDANE:‌​‍

Accepted Answer

Extraordinary — Mundane = ordinary/boring.‌​‍

Answer

Boring

Answer

Daily

Answer

Ordinary

Question 2

Considering the industrial production and applications of polyethylene, which of the following statements correctly distinguishes between Low-Density Polyethylene (LDPE) and High-Density Polyethylene (HDPE)?

Accepted Answer

C. LDPE is produced via high-pressure free radical polymerization, leading to a highly branched molecular structure that results in lower density and greater flexibility, making it suitable for plastic films and squeeze bottles. In contrast, HDPE is synthesized using Ziegler-Natta or Phillips catalysts under lower pressure, yielding a more linear structure, higher density, and greater rigidity, ideal for milk jugs and pipes. — Option C accurately describes the differences. LDPE's highly branched structure, a result of high-pressure free radical polymerization, prevents close packing, leading to its lower density and flexibility, making it ideal for films. HDPE, produced with catalysts under lower pressure, has a more linear structure, allowing for denser packing, which results in higher rigidity and strength, suitable for items like milk jugs and pipes. Options A and B incorrectly swap the structural characteristics, production methods, and applications of LDPE and HDPE. Option D is incorrect because both LDPE and H

Answer

A. LDPE is formed under low pressure and temperature using Ziegler-Natta catalysts, resulting in a linear structure ideal for rigid pipes, while HDPE is produced via high-pressure processes, leading to branched structures suitable for flexible films.

Answer

B. HDPE is characterized by a high degree of branching in its polymer chains, making it less dense and more flexible for applications like plastic bags, whereas LDPE possesses a more linear structure, lending itself to rigid containers.

Answer

D. Both LDPE and HDPE are homopolymers of propene, but their differing densities arise from varying degrees of cross-linking, with LDPE having more cross-links for flexible applications and HDPE having fewer for rigid applications.

Question 3

A 6-month-old infant is brought for a routine well-baby check-up. Which of the following gross motor milestones is typically expected at this age?

Accepted Answer

B. Sitting without support — At 6 months, infants typically achieve the milestone of sitting without support. Walking with assistance is expected around 9-12 months, standing independently around 12-15 months, and crawling often starts between 6-10 months but sitting without support is a more consistent 6-month milestone.

Answer

A. Walking with assistance

Answer

C. Standing independently

Answer

D. Crawling on hands and knees

Question 4

Gandhi Jayanti (International Day of Non-Violence):‌​‍

Accepted Answer

2 October — 2 October — declared by UN.‌​‍

Answer

UN declared

Answer

30 Jan

Answer

2 Oct and 30 Jan

Question 5

SNDP Yogam founded by:

Accepted Answer

Sree Narayana Guru — Sree Narayana Guru founded SNDP Yogam (1903).

Answer

Ayyankali

Answer

Dr. Palpu

Answer

Kumaran Asan

Question 6

Synonym of DISCREPANCY:‌​‍

Accepted Answer

Difference — Inconsistency.‌​‍

Answer

Match

Answer

Harmony

Answer

Agreement

Question 7

Mole fraction of solute in a solution with 2 mol solute and 8 mol solvent:‌​‍

Accepted Answer

0.2 — x_solute = n_solute/(n_solute + n_solvent) = 2/10 = 0.2. Sum x_i = 1.‌​‍

Answer

0.8

Answer

0.1

Answer

0.25

Question 8

The Union List currently has approximately:‌​‍

Accepted Answer

100 subjects — Union List has ~100 subjects (originally 97). ‌​‍Defence, foreign affairs, banking, railways, etc.

Answer

50 subjects

Answer

75 subjects

Answer

125 subjects

Question 9

The sex of a human child is determined by:‌​‍

Accepted Answer

Father's sperm (X or Y chromosome) — Mother always gives X; father gives X (daughter) or Y (son).‌​‍

Answer

Mother's chromosome

Answer

Environment

Answer

Blood type

Question 10

Mahalanobis model of the Second FYP emphasised:

Accepted Answer

Heavy industries + public sector — PC Mahalanobis's 2-sector/4-sector model: capital goods industries first to enable later consumer goods production.

Answer

Agriculture

Answer

Services

Answer

Exports

KAS Prelims Mixed Practice Test #338