LGS Mixed Practice Test #243

Question 1

'Kannimara teak' is one of the world's largest teak tree found in:‌​‍

Accepted Answer

Parambikulam — Parambikulam Tiger Reserve, Palakkad — Kannimara teak.‌​‍

Answer

Chimmini

Answer

Kottiyoor

Answer

Aaralam

Question 2

Number of significant figures in 0.00230 is:‌​‍

Accepted Answer

3 — Leading zeros are not significant; trailing zero after decimal is. ‌​‍2, 3, 0 → three sig figs.

Answer

6

Answer

2

Answer

5

Question 3

University of Travancore year:‌​‍

Accepted Answer

1937 — Founded 1937.‌​‍

Answer

1957

Answer

1925

Answer

1947

Question 4

Kerala has consistently led in educational achievements. Among its many 'firsts', which district in Kerala was the first in India to achieve 100% primary education under the 'Sarva Shiksha Abhiyan' (SSA) program, demonstrating a pioneering commitment to universal literacy?

Accepted Answer

A. Ernakulam — Ernakulam district was the first in India to achieve 100% primary education under the Sarva Shiksha Abhiyan (SSA) program in 2015, building on its earlier achievement of being the first fully literate district in India in 1990. While other districts like Kottayam and Palakkad have high literacy rates, Ernakulam holds this specific 'first' for primary education under SSA.

Answer

B. Kottayam

Answer

C. Malappuram

Answer

D. Palakkad

Question 5

The cochlea of the ear is involved in:

Accepted Answer

Hearing (converting sound to nerve impulses) — Cochlea houses the organ of Corti; hair cells convert vibrations to neural signals.

Answer

Balance only

Answer

Taste

Answer

Smell

Question 6

Which specific chemical test is employed for the identification of deoxysugars present in cardiac glycosides, characterized by a reddish-brown color in the acetic acid layer and a bluish-green color in the sulfuric acid layer?

Accepted Answer

A. Keller-Kiliani test — The Keller-Kiliani test is a characteristic reaction for the presence of 2-deoxysugars, such as digitoxose, which are part of cardiac glycoside structures. Borntrager's test identifies anthraquinone glycosides, while Legal's and Baljet tests detect the butenolide ring of cardiac glycosides.

Answer

B. Borntrager's test

Answer

C. Legal's test

Answer

D. Baljet test

Question 7

Largest freshwater lake (India):‌​‍

Accepted Answer

Wular — Wular Lake (J&K).‌​‍

Answer

Chilika

Answer

Vembanad

Answer

Dal

Question 8

Which matrix represents a counter-clockwise rotation by angle θ?‌​‍

Accepted Answer

[[cos,-sin],[sin,cos]] — Counter-clockwise rotation. ‌​‍Product of two rotations is a rotation by sum of angles.

Answer

Zero matrix

Answer

Identity

Answer

[[sin,cos],[-cos,sin]]

Question 9

Echinoderms:‌​‍

Accepted Answer

Starfish, sea urchin — Starfish, sea urchins — radial symmetry.‌​‍

Answer

Sponges

Answer

Jellyfish

Answer

Octopus

Question 10

Wave velocity v, frequency f and wavelength λ are related by:‌​‍

Accepted Answer

v = f × λ — The fundamental wave equation: speed = frequency × wavelength.‌​‍

Answer

v = λ/f

Answer

v = f/λ

Answer

v = f + λ

LGS Mixed Practice Test #243