Which of the following statement is correct about Bakelite? (1) It is a linear polymer (2) It is a cross linked polymer (3) It is an addition polymer (4) It is a branched chain polymer
The term ecosystem was coined by (a) E. Haeckel (b) E.Warming (c) E.P. Odum (d) A. G. Tansley.
Which is the national aquatic animal of India? (a) Blue whale (b) Sea-horse (c) Gangetic shark (d) River dolphin