LGS Mixed Practice Test #2

Question 1

A patient using an over-the-counter antacid regularly for heartburn begins to experience constipation. Which of the following inorganic antacids is most commonly associated with this particular gastrointestinal side effect?

Accepted Answer

B. Aluminum hydroxide — Aluminum hydroxide is well-known for causing constipation due to its astringent properties and the formation of insoluble aluminum salts in the intestine. Magnesium hydroxide typically causes diarrhea, while sodium bicarbonate can lead to systemic alkalosis and gas. Calcium carbonate can cause constipation but is also associated with acid rebound.

Answer

A. Magnesium hydroxide

Answer

C. Sodium bicarbonate

Answer

D. Calcium carbonate

Question 2

An electric heater operating at 230 V draws 2 A current. Its power is:‌​‍

Accepted Answer

460 W — P = VI = 230 × 2 = 460 W.‌​‍

Answer

115 W

Answer

230 W

Answer

1000 W

Question 3

Mycoplasma are unique because they:‌​‍

Accepted Answer

Lack cell wall — Smallest free-living organisms. ‌​‍Pleomorphic (variable shape). Resistant to penicillin (which inhibits cell wall synthesis).

Answer

Have large size

Answer

Photosynthesise

Answer

Have nucleus

Question 4

'Kothikkallu' refers to:‌​‍

Accepted Answer

Boundary stones between Kochi and Travancore kingdoms — Ko-thi = Kochi+Thiruvithamkoor; stones marked the erstwhile kingdom boundary.‌​‍

Answer

Memorial pillars

Answer

Temple foundations

Answer

Ancient script carvings

Question 5

Bluetooth is used for:

Accepted Answer

Short-range wireless data exchange — Bluetooth works ~10m range in 2.4 GHz band; named after Harald Bluetooth.

Answer

Long-distance radio

Answer

Satellite comms

Answer

Power transmission

Question 6

PM e-VIDYA scheme launched during COVID aims to:‌​‍

Accepted Answer

Unify digital education via one channel per class — PM e-VIDYA launched in 2020 provides dedicated DIKSHA/Swayam Prabha TV channels for each class (1-12).‌​‍

Answer

Provide free laptops

Answer

Build hospitals

Answer

Train teachers abroad

Question 7

Work done is defined as the product of:‌​‍

Accepted Answer

Force and displacement in direction of force — Work = F × s × cos θ; SI unit is Joule (J).‌​‍

Answer

Force and time

Answer

Power and time

Answer

Mass and acceleration

Question 8

Power dissipated in a resistor is:‌​‍

Accepted Answer

All of the above are equivalent — Using Ohm's law V=IR, all three expressions give the same power.‌​‍

Answer

I²R

Answer

V²/R

Answer

V × I

Question 9

Autoimmune diseases occur when:‌​‍

Accepted Answer

Immune system mistakenly attacks the body's own tissues — Examples: type 1 diabetes, rheumatoid arthritis, multiple sclerosis, lupus.‌​‍

Answer

Viruses invade

Answer

Immune system fails entirely

Answer

Blood thins

Question 10

Thymus:‌​‍

Accepted Answer

T-cell maturation — T-lymphocyte training ground.‌​‍

Answer

None

Answer

Hormone only

Answer

Blood making

LGS Mixed Practice Test #2