Question

Some statements are given below each with one or two blanks. Select the option that correctly fills up the blanks.
i) High concentration of DDT disturbs ___________ in birds, which causes _______.
ii) __________ burns more efficiently as compared to petrol and diesel.
iii) __________ is the natural aging of a lake which occurs due to accumulation of ____________.
iv) _________ reduces the number of organisms which are sensitive to high temperature.
v) Irreparable computers and other electronic goods are known as _________.

1. i) Calcium metabolism, thinning of eggshell ii) CNG iii) Eutrophication, nitrates and phosphates iv) Thermal wastewater v) electronic waste.  
2. i) Protein metabolism, thickening of egg shell ii) CNG iii) Eutrophication, nitrates and phosphates iv) Thermal waste water.    
3. i) Calcium metabolism, thinning of egg shell ii) Coal iii) Biomagnification, nitrates and phosphates iv) Organic waste water v) inorganic waste.    
4. i) Calcium metabolism, thickening of egg shell ii) CNG iii) Biomagnification, DDT and mercury iv) Thermal waste water v) electronic waste.