LGS Mixed Practice Test #635

Question 1

Kerala's most densely populated district:‌​‍

Accepted Answer

Alappuzha (~1,500/km²) — Kerala density ~860/km². Idukki least dense. Kerala has >90% literacy.‌​‍

Answer

Thiruvananthapuram

Answer

Wayanad

Answer

Idukki

Question 2

The refractive index of a medium is defined as:‌​‍

Accepted Answer

speed of light in vacuum / speed of light in medium — n = c/v; higher n means slower light (denser optically).‌​‍

Answer

speed of light in medium / speed of light in vacuum

Answer

angle ratio only

Answer

density ratio

Question 3

Food preservatives:‌​‍

Accepted Answer

NaCl (common), sodium benzoate, sorbic acid — Inhibit microbial growth. ‌​‍Class I (NaCl, sugar, vinegar) and Class II (chemical) preservatives.

Answer

Oxygen

Answer

Cellulose

Answer

Water only

Question 4

Which of the following biomolecules is classified as a simple carbohydrate?

Accepted Answer

C. Lactose — Lactose is a disaccharide composed of glucose and galactose, making it a simple carbohydrate. Starch and glycogen are polysaccharides, while cellulose is a structural polysaccharide that humans cannot digest. Simple carbohydrates are monosaccharides or disaccharides, and lactose fits this category.

Answer

A. Starch

Answer

B. Glycogen

Answer

D. Cellulose

Question 5

Thiru-Kochi state was formed by the merger of Travancore and Kochi on:‌​‍

Accepted Answer

1 July 1949 — Travancore and Kochi merged on 1 July 1949 to form Thiru-Kochi state.‌​‍

Answer

15 August 1947

Answer

1 November 1956

Answer

26 January 1950

Question 6

Water is made up of which two elements?

Accepted Answer

Hydrogen and Oxygen — Water (H₂O) is made up of Hydrogen and Oxygen — 2 atoms of Hydrogen and 1 atom of Oxygen.

Answer

Hydrogen and Nitrogen

Answer

Oxygen and Carbon

Answer

Nitrogen and Oxygen

Question 7

The ABO blood grouping system was discovered by:‌​‍

Accepted Answer

Karl Landsteiner — Landsteiner discovered ABO (1901) — Nobel Prize 1930.‌​‍

Answer

Pasteur

Answer

Watson

Answer

Mendel

Question 8

Newton's first law defines:

Accepted Answer

Inertia — A body at rest stays at rest, in motion stays in motion unless acted on by net external force — defines inertia; concept of inertial frames.

Answer

Force

Answer

Acceleration

Answer

Impulse

Question 9

The first complete census of Travancore was conducted in:‌​‍

Accepted Answer

1836 — The first systematic census in Travancore was conducted in 1836, much before the all-India census.‌​‍

Answer

1891

Answer

1875

Answer

1901

Question 10

IP version 4 address format:‌​‍

Accepted Answer

32-bit, 4 octets — ~4.3 billion addresses. ‌​‍IPv6: 128-bit (2^128 addresses). IPv4 exhaustion led to IPv6 adoption. ‌​‍Dual-stack transition.

Answer

8-bit

Answer

128-bit

Answer

64-bit

LGS Mixed Practice Test #635