Question
The concept of Fundamental Duties was borrowed
from?ÂSolution
The concept of Fundamental Duties  in the Indian Constitution was borrowed from the Constitution of the USSR (erstwhile Soviet Union) .
The gas used for filling weather balloons is-
The fuel that is used in modern submarines is -
Formation of ozone hole is maximum over
Petroleum is a mixture of-
 Alum stops bleeding in minor cuts because of
The most reactive among the halogens is-
The element used in the manufacture of safety matches is —
Milk tastes sour when kept in the open for sometimes due to the formation of-
The important ore of aluminium is-
______is the process in which acids and bases react to form salts and water