Subject: Science and Technology

Assertion (A): In the periodic table of chemical elements, electron affinity is always found to increase from top to bottom in a group.
Reason (R): In a group, the atomic radii generally increase from top to bottom.

Consider the following conditions of a sick human body:
1. Swollen lymph nodes
2. Sweating at night
3. Loss of memory
4. Loss of weight
Which of these are the symptoms of AIDS?

If the radius of the Earth were to shrink by one percent, its mass remaining the same, the value of ‘g’ on the Earth’s surface would:

With reference to normal human beings, consider the following statements:
1. In response to the presence of HCL, secretin is produced from the duodenum.
2. Enterogastrone is produced in the small intestine in response to the presence of fatty acids.
Which of these statements is/are correct?

Salts of which of the following elements provide colours to fireworks?

A weightless rubber balloon is filled with 200 cc of water. Its weight in water is equal to:

Standard 18-carat gold sold in the market contains:

Match List I (Fuel Gases) with List II (Major Constituents) and select the correct answer using the codes given below.
List I
(A) CNG
(B) Coal gas
(C) LPG
(D) Water gas

List II
1. Carbon monoxide, Hydrogen
2. Butane, Propane
3. Methane, Ethane
4. Hydrogen, Methane, Carbon monoxide