1- The number of isotopes in the hydrogen – 3
2-Age of the fossils is estimated by the radio carbon dating.
3- The group displacement law is propounded by Sody & Fujan.
4-The estimation of the age of the earth is done by Uranium dating.
5- Becquerel is the unit of radioactivity.
6- Alpha-rays consist of two unit positive charges.
7-The rusting of the iron is the example of Oxidation.
8-The tendency to accept the electron is called Reduction.
9-The tendency to donate the electron is called Oxidation.
10- The shape of the ethylene molecule is Coplanar triangular.
11-India stands second as a world producer of sugar but occupies the first place in the production of gur and khandsari.
12- In 2005, National Jute Policy was formulated with the objective of increasing productivity, improving quality, ensuring good prices to the jute farmers and enhancing the yield per hectare.
13-India is the largest producer of raw jute and jute goods and stands at second place as an exporter after Bangladesh.
14-There are nearly 1600 cotton and human made fibre textile mills in the country.
15-India has 14,500 km of navigable waterways, contributing about 1% to the country’s transportation.
16-The Inland Waterways Authority of India (IWAI) came into existence on 27th October 1986 for development and regulation of inland waterways for shipping and navigation.
17-India has a vast coastline of approximate 7,517 km, including islands.
18-The first railway on Indian sub-continent ran over a stretch of 21 miles from Bombay to Thane.
19-The first passenger train steamed out of Howrah station destined for Hooghly, a distance of 24 miles, on 15th August, 1854.
20-1911 – Air transport in India was launched between Allahabad and Naini.