LGS Mixed Practice Test #671

Question 1

Dolly the sheep (1997) was produced by:‌​‍

Accepted Answer

Somatic cell nuclear transfer (cloning) by Ian Wilmut — First mammal cloned from adult somatic cell. ‌​‍Roslin Institute, Scotland. Premature aging (shorter telomeres).

Answer

Selective breeding

Answer

IVF

Answer

Parthenogenesis

Question 2

Pygmy Hog:

Accepted Answer

Assam — Assam Manas.

Answer

Arunachal

Answer

WB

Answer

Manipur

Question 3

In an experiment demonstrating the photoelectric effect, it is observed that electrons are only ejected from a metal surface if the incident light's frequency exceeds a specific threshold, irrespective of the light's intensity. Furthermore, for frequencies above this threshold, increasing the light's intensity increases the *number* of ejected electrons, but not their *maximum kinetic energy*. This set of observations provides strong evidence for which of the following?

Accepted Answer

C. The quantum nature of light, where energy is transferred in discrete packets called photons. — Option C accurately reflects that the quantum nature of light, specifically the photon concept (E=hν), is required to explain the observed phenomena of the photoelectric effect. The existence of a threshold frequency implies that energy is transferred in discrete packets (photons), each needing sufficient energy to overcome the metal's work function. Classical wave theory (Option B) fails to explain the threshold frequency and predicts that electron kinetic energy should increase with light intensity, contradicting observations. Options A and D are unrelated or do not provide the fundamental e

Answer

A. The inverse square law governing the intensity of light.

Answer

B. The classical wave theory of light, predicting continuous energy transfer to electrons.

Answer

D. The principle of conservation of momentum in light-matter interactions.

Question 4

Glomerular filtration rate (GFR) is approximately:‌​‍

Accepted Answer

125 mL/min — ~180 L/day filtered; ~178 L reabsorbed; ~1.5 L urine. ‌​‍Juxtaglomerular apparatus regulates GFR.

Answer

10 mL/min

Answer

1000 mL/min

Answer

25 mL/min

Question 5

Insuaff Cutcheries for the dispensation of justice was established in Travancore in the 19th century by:‌​‍

Accepted Answer

T. Madhava Rao — T. ‌​‍Madhava Rao (Dewan) modernised the Travancore judiciary, including these courts.

Answer

Raja Kesava Das

Answer

Velu Thampi

Answer

Ummini Thampi

Question 6

Who served as the first Chief Minister of the newly formed Travancore-Cochin state after the merger?

Accepted Answer

B. Pattom A. Thanu Pillai — Pattom A. Thanu Pillai became the first Chief Minister of Travancore-Cochin after the merger. C. P. Ramaswami Iyer was the Dewan of Travancore before the merger, while T. K. Narayana Pillai and Panampilly Govinda Menon served later in the state's political history. The question tests knowledge of post-merger leadership.

Answer

A. C. P. Ramaswami Iyer

Answer

C. T. K. Narayana Pillai

Answer

D. Panampilly Govinda Menon

Question 7

Kinetic energy of a moving body is given by:

Accepted Answer

½ mv² — KE = ½ mv²; depends on mass and square of speed.

Answer

mgh

Answer

mv

Answer

F·d

Question 8

Soviet Union dissolved in:‌​‍

Accepted Answer

1991 — USSR formally dissolved 26 December 1991. ‌​‍15 successor states including Russia, Ukraine, Kazakhstan. Gorbachev resigned.

Answer

1989

Answer

1993

Answer

2000

Question 9

In which state does the westernmost point of mainland India lie?‌​‍

Accepted Answer

Gujarat (Guhar Moti) — Guhar Moti in Kutch (Gujarat) is the westernmost point of mainland India.‌​‍

Answer

Rajasthan

Answer

Maharashtra

Answer

Karnataka

Question 10

The general formula of alkynes is:‌​‍

Accepted Answer

CₙH₂ₙ₋₂ — Alkynes have one C≡C triple bond; formula CₙH₂ₙ₋₂.‌​‍

Answer

CₙH₂ₙ₊₂

Answer

CₙH₂ₙ₊₁

Answer

CₙH₂ₙ

LGS Mixed Practice Test #671