Fats are made from edible oils using the process of:

• (A) Saponification
• (B) Esterification
• (C) Catalytic hydrogenation
• (D) Hydrogenation

The main precursors of winter smog are:

• (A) N₂O and hydrocarbons
• (B) NO₂ and hydrocarbons
• (C) SO₂ and hydrocarbons
• (D) SO₂ and ozone

Most kidney stones are composed of:

• (A) Calcium carbonate
• (B) Calcium oxalate
• (C) Magnesium carbonate
• (D) Magnesium oxalate

There are two statements given below:

Statement I: Steam produces less severe burns than water at the same temperature.
Statement II: Dry ice is colder than regular ice.

• (A) Both Statement I and Statement II are correct.
• (B) Both Statement I and Statement II are incorrect.
• (C) Statement I is correct and Statement II is incorrect.
• (D) Statement I is incorrect and Statement II is correct.

Arrange the following electromagnetic waves according to the increasing frequency:

(1) Gamma rays
(2) X-rays
(3) Radio waves
(4) Microwaves

• (A) 3, 4, 2, 1
• (B) 1, 2, 4, 3
• (C) 2, 1, 4, 3
• (D) 4, 3, 1, 2

Consider the given four statements:

(1) A concave mirror is a diverging mirror.
(2) Image formed by a concave mirror is generally real and inverted.
(3) A convex mirror is a converging mirror.
(4) Image formed by a convex mirror is always virtual, erect and diminished.

• (A) 1 and 2 only
• (B) 1 and 3 only
• (C) 2 and 4 only
• (D) 3 and 4 only

Consider the given four statements about ethanol:

(1) It is the main constituent of all alcohol drinks.
(2) It is not a good solvent.
(3) It is soluble in water in all proportions.
(4) It cannot be used as an additive in petrol.

• (A) 1 and 2 only
• (B) 1 and 3 only
• (C) 2 and 4 only
• (D) 1 and 4 only

Match List I with List II:

List I (Acid):
(a) Ascorbic Acid
(b) Malic Acid
(c) Formic Acid
(d) Tartaric Acid

List II (Source):
(i) Apples and pears
(ii) Ant stings
(iii) Tamarind and grapes
(iv) All citrus fruits

• (A) (ii)(iii)(iv)(i)
• (B) (iv)(iii)(ii)(i)
• (C) (iv)(i)(ii)(iii)
• (D) (iv)(iii)(i)(ii)

Match List I with List II:

List I:
(a) Hydrophone
(b) Megaphone
(c) Anemometer
(d) Tachometer

List II:
(i) An instrument measuring the rotation speed of a shaft or disk
(ii) An instrument that measures wind speed
(iii) An instrument that spreads sound to far-off places
(iv) An underwater device that detects and records ocean sounds from all directions

• (A) (iv)(ii)(iii)(i)
• (B) (i)(iii)(ii)(iv)
• (C) (i)(ii)(iv)(iii)
• (D) (iv)(iii)(ii)(i)