LGS Mixed Practice Test #42

Question 1

Kerala Tourism Statistics (foreign):

Accepted Answer

~10 lakh arrivals/year pre-COVID — About 1.1 million in 2019.

Answer

1 crore

Answer

50 lakh

Answer

2 lakh

Question 2

The shape of a galaxy like the Milky Way is primarily:‌​‍

Accepted Answer

Spiral — Milky Way is a barred spiral galaxy.‌​‍

Answer

Spherical

Answer

Irregular

Answer

Elliptical

Question 3

Vigilance and Anti-Corruption Bureau Kerala:‌​‍

Accepted Answer

Statutory — State vigilance agency.‌​‍

Answer

Administrative

Answer

Political

Answer

None

Question 4

Kerala area:

Accepted Answer

38,863 sq km — 22nd largest state.

Answer

28,863 sq km

Answer

33,863 sq km

Answer

43,863 sq km

Question 5

Cones in the retina provide:

Accepted Answer

Colour vision in bright light — Three cone types (S, M, L) detect blue, green, red wavelengths respectively.

Answer

Night vision

Answer

Depth perception only

Answer

Peripheral vision

Question 6

Which functional group is primarily responsible for the antibacterial activity of penicillin antibiotics?

Accepted Answer

B. Beta-lactam ring — The beta-lactam ring is the critical structural component of penicillin and other beta-lactam antibiotics. It is essential for inhibiting bacterial transpeptidases (penicillin-binding proteins), which are crucial for bacterial cell wall synthesis. The other components contribute to stability, spectrum, or pharmacokinetics but are not the primary pharmacophore.

Answer

A. Thiazolidine ring

Answer

C. Carboxylic acid group

Answer

D. Amide side chain

Question 7

Catenation is most pronounced in:

Accepted Answer

C — Carbon's ability to form long chains and rings (self-linking) enables organic chemistry. Strong C-C bonds.

Answer

N

Answer

O

Answer

P

Question 8

Pamba River originates from:

Accepted Answer

Pulachimalai — The Pamba River originates from Pulachimalai hill in the Peermedu taluk of Idukki district.

Answer

Anamudi

Answer

Devikulam

Answer

Western Ghats near Peer Medu

Question 9

Why does ice float on water?‌​‍

Accepted Answer

Ice is less dense than water — Water expands when it freezes (anomalous expansion), making ice less dense than liquid water. ‌​‍Maximum density at 4°C.

Answer

Ice is denser

Answer

Ice has more salt

Answer

Ice is colder

Question 10

Animal kingdom divisions phyla:‌​‍

Accepted Answer

30+ — About 35+ phyla.‌​‍

Answer

11

Answer

9

Answer

5

LGS Mixed Practice Test #42