Five major problems faced by the road transport in India are: (i) Road network is inadequate in India. (ii) About half of the roads are unmetalled and this limits their usage during the rainy season. (iii)...
How many elements known to us? Ans: 118 Who gave the theory of triads? Ans: Dobereiner Who gave Octave theory? Ans: Newlands What is the drawback of Dobereiner traits? Only three triads were recognised...