Question

Pick the odd one out from the following groups and give reasons for doing so:
a) Montenegro, Romania, Macedonia, Sweden
b) River Danube, Dnieper, Don Volga.
c) Carbon dioxide, Ozone, Methane, Nitrogen.
d) Hygrometer, Barometer, Anemometer, Thermograph.
e) Carpet making, Food products, Sculpture, Fertilizers.​

Answer 1

Answer:

a) Macedonia

b)  Don Volga

c)  Ozone

d) Thermograph

e) Carpet making

Explanation:

Macedonia was an ancient kingdom, while other are modern day countries. [Note: North Macedonia is a modern day country]

Don Volga is a canal, while other are rivers.

Ozone is a very unstable gas, while the other 3 gases are quite stable.

Thermograph uses infrared radiation to produce image representing various temperature zones, while others do not use infrared radiations.

Carpet making is a process, while others are finished products.