Questions

A living community and its environment is what an ecosystem is.

The study of trees is called Dendrology.

Galvanised iron sheets have a coating of zinc.

The Qutub Minar in New Delhi was lit up in blue as part of World Autism Day on 2 April.

60 years

Internal Rate of Return is that rate of Return at which the net present value is equal to Zero or it is the Rate which equates the present value of the cash inflows to the cash outflows.

NPV = Cash Inflow - Cash outflow

NPV = Zero

Colloids include gels, sols, and emulsions; the particles do not settle, and cannot be separated out by ordinary filtering or centrifuging like those in a suspension.

These Colloid substances consists of ultramicroscopic particles of one substance dispersed through another substance from which we cannot separate them.

Sugar water is not a colloid and it is a solution in which we can separate them.