Plus 2 Lecturer Mixed Practice Test #112

Question 1

Packing efficiency of FCC:

Accepted Answer

74.05% — Maximum in cubic systems. HCP also 74%. Simple cubic: 52.4%; BCC: 68%.

Answer

52.36%

Answer

68%

Answer

100%

Question 2

Karl Marx identified the two main classes in capitalist society as:‌​‍

Accepted Answer

Bourgeoisie (capital owners) and Proletariat (wage labourers) — Marx: bourgeoisie owns means of production; proletariat sells labour power. ‌​‍Their opposed interests drive class struggle.

Answer

Men and women

Answer

Rich and poor

Answer

Noble and peasant

Question 3

Percentage of N in NH₃ (M=17):‌​‍

Accepted Answer

14/17 = 82.35% — %N = (14/17) × 100 ≈ 82.35%. H = 3/17 ≈ 17.65%.‌​‍

Answer

100%

Answer

17%

Answer

14%

Question 4

The increasing prevalence of nuclear families and geographical mobility in Kerala is a significant social change. How might this trend primarily impact the health and well-being of the elderly population?

Accepted Answer

B. Increased social isolation and reduced informal care support from family members. — The shift towards nuclear families and increased geographical mobility often leads to reduced proximity and availability of family members to provide informal care and social support for the elderly. This can result in increased social isolation, loneliness, and a decline in overall well-being. Options A, C, and D are less direct or generally incorrect consequences of these specific social changes on the elderly.

Answer

A. Enhanced access to specialized geriatric care due to smaller family units.

Answer

C. Greater financial independence for the elderly as they manage their own resources.

Answer

D. Decreased incidence of chronic diseases due to modern lifestyle adaptations.

Question 5

pH of neutral water at 25°C is:‌​‍

Accepted Answer

7 — Kw = [H⁺][OH⁻] = 10⁻¹⁴ at 25°C → [H⁺] = 10⁻⁷ M → pH=7. ‌​‍At higher T, Kw increases; pH of neutral water drops.

Answer

1

Answer

14

Answer

0

Question 6

EDTA is a:‌​‍

Accepted Answer

Hexadentate chelating ligand — Binds via 4 O and 2 N. Used in water softening, titrations of Ca²⁺, Mg²⁺.‌​‍

Answer

No binding

Answer

Bidentate

Answer

Monodentate

Question 7

Cloning of Dolly the sheep (1996) was achieved by:

Accepted Answer

Somatic cell nuclear transfer — Dolly was the first mammal cloned from an adult somatic cell (Ian Wilmut, Roslin Institute).

Answer

Artificial insemination

Answer

Gene therapy

Answer

Tissue culture

Question 8

A speech made without preparation is:‌​‍

Accepted Answer

Extempore/Impromptu — Extempore/impromptu = unprepared, on the spot.‌​‍

Answer

Discourse

Answer

Oration

Answer

Recital

Question 9

Where were the war criminals of the Second World War put to trial?

Accepted Answer

Nuremberg — The Nuremberg Trials (1945–46) prosecuted major Nazi war criminals.

Answer

Pittsburgh

Answer

Petersburg

Answer

Gettysburg

Question 10

Operon model was proposed for:‌​‍

Accepted Answer

Prokaryotic gene regulation (lac operon in E. coli) — Jacob and Monod (Nobel 1965). ‌​‍Lactose induces; glucose represses (catabolite repression).

Answer

Virus only

Answer

Eukaryotic genes

Answer

Plant genes

Plus 2 Lecturer Mixed Practice Test #112