LGS Mixed Practice Test #310

Question 1

The common laboratory acid used for esterification is:

Accepted Answer

Conc. H₂SO₄ (dehydrating agent) — Concentrated H₂SO₄ catalyses and removes water, shifting equilibrium toward ester.

Answer

HCl

Answer

HNO₃

Answer

Acetic acid

Question 2

A common health education point for older adults, particularly post-menopausal women, is the importance of calcium and Vitamin D for preventing osteoporosis. Vitamin D's primary role in bone health is to:

Accepted Answer

C. Enhance calcium absorption from the intestine. — Vitamin D is crucial for bone health because it plays a vital role in regulating calcium and phosphate levels in the body. Its primary function is to enhance the absorption of dietary calcium from the gastrointestinal tract, ensuring adequate calcium is available for bone mineralization and maintenance.

Answer

A. Directly strengthen bone matrix.

Answer

B. Stimulate osteoclast activity.

Answer

D. Increase calcium excretion by the kidneys.

Question 3

The chief ore of Aluminium is:‌​‍

Accepted Answer

Bauxite — Bauxite (Al₂O₃·xH₂O) is the principal aluminium ore.‌​‍

Answer

Haematite

Answer

Magnetite

Answer

Dolomite

Question 4

Who discovered the Edakkal Caves and its rock art in Wayanad?‌​‍

Accepted Answer

Fawcett — F. Fawcett, a British police superintendent, documented Edakkal in 1890.‌​‍

Answer

William Logan

Answer

Babington

Answer

Robert Bruce Foote

Question 5

Kerala Rajya Sabha seats:‌​‍

Accepted Answer

9 — 9 Rajya Sabha members.‌​‍

Answer

13

Answer

11

Answer

7

Question 6

Which inorganic compound is commonly used as an antacid and is also a constituent of toothpaste due to its mild abrasive and fluoride-releasing properties?

Accepted Answer

D. Sodium fluoride (NaF) — Sodium fluoride (NaF) is widely used in toothpastes and mouthwashes for its ability to remineralize enamel and prevent dental caries. While the other options are antacids, only NaF provides fluoride, essential for dental health.

Answer

A. Calcium carbonate (CaCO3)

Answer

B. Magnesium hydroxide (Mg(OH)2)

Answer

C. Sodium bicarbonate (NaHCO3)

Question 7

Unit of power:

Accepted Answer

Watt — W = J/s. 1 horsepower ≈ 746 W.

Answer

Joule

Answer

Newton

Answer

Pascal

Question 8

The density of pure water at 4 °C is:

Accepted Answer

1 g/cm³ — Water has maximum density 1 g/cm³ (=1000 kg/m³) at 4 °C.

Answer

0.5 g/cm³

Answer

1.5 g/cm³

Answer

10 g/cm³

Question 9

Teachers' Day:‌​‍

Accepted Answer

5 Sep — 5 September (Dr. S. Radhakrishnan's birthday).‌​‍

Answer

14 Nov

Answer

2 Oct

Answer

15 Aug

Question 10

Vakkom Moulavi was a reformer associated with which community?‌​‍

Accepted Answer

Muslim — Vakkom Abdul Khader Moulavi was a Muslim social reformer, educationist, and freedom fighter from Travancore.‌​‍

Answer

Hindu Ezhava

Answer

Buddhist

Answer

Christian

LGS Mixed Practice Test #310