A good number of Tilapia fishes are released in a pond having only different indigenous fish species grown naturally. Think and write which type of struggle for existence Tilapia fishes have to face survive.

A good number of Tilapia fishes are released in a pond having only different indigenous fish species grown naturally. Think and write which type of struggle for existence Tilapia fishes have to face to live in that pond.

State whether True or False: Introduction of Tilapia and giant African magur in the ponds of rural Bengal posed a huge problem for the existence of indigenous fishes.

An element A occupies group number 15 and period number 3, exhibits allotropy and it is tetra atomic. A reacts with caustic soda a to give B which is having rotten fish odour. A reacts with chlorine to give C which has a smell of garlic. Identity A, B and C. Write the reactions.