Questions

A closed room is aplace where charcoal is burnt in limited supply of air. There is every chance for the formation of the deadly poisonous carbon monoxide, which when inhaled, reacts with the iron in haemoglobin of blood and prevents the supply of oxygen. It is said to be treacherous as there can be no previous warning of its presence because it is an odourless and colourless gas.

Crossover rates have to do with the amount of earnings that are generated by two different but similar projects. The crossover rate is the point at which the two projects achieve the same net present value. In terms of investments, calculating a crossover rate between two similar securities can help an investor determine what to buy and what to sell.

Largest bird is Ostrich and Smallest Bird is Humming Bird

Yes, the given statement that water is more dense than cooking oil is TRUE as water more denser than oil it is sinked when it is poured in oil.

A 40% solution of Formaldehyde known as Formalin is used in the preservation of biological specimens because of its hardening action on proteins.