An otherwise normal healthy young man started perspiring while it was intensely cold outside. Explain.

The breathing rate of a normal healthy man is

A normal visioned woman, whose father is colour blind, marries a normal visioned man. What would be probability of her sons and daughters to be colour blind. ? Explain with the help of a pedigree chart.

(a) HIV and Hepatitis-B are STDs. Mention the two other ways by which they can be transmitted to a healthy person. (b) Why is early detection of STD essential? What can it lead to otherwise? Explain.

A parallel beam of light (lambda= 5000 Å) is incident at an angle theta=30^@ with the normal to the slit plane in a Young's double slit experiment. The intensity due to each slit is I_0 . Point O is equidistant from S_1 and S_2 . The distance between slits is 1mm.

On exposure to air, alkali metals get tranished due to formation of oxides, hydroxides and carbonates on their surface. When heated in air or oxygen they burn vigourously forming different types of oxides depending upon the nature of the metal. The formation and stability of these metals can be explained on the basis of size of alkali metal ion and the anion. Peroxides are colourless, while superoxides are coloured. The normal oxides are basic while peroxides and superoxides act as oxidising agents. Oxone is

On exposure to air, alkali metals get tranished due to formation of oxides, hydroxides and carbonates on their surface. When heated in air or oxygen they burn vigourously forming different types of oxides depending upon the nature of the metal. The formation and stability of these metals can be explained on the basis of size of alkali metal ion and the anion. Peroxides are colourless, while superoxides are coloured. The normal oxides are basic while peroxides and superoxides act as oxidising agents. On heating in excess of oxygen, potassium gives

On exposure to air, alkali metals get tranished due to formation of oxides, hydroxides and carbonates on their surface. When heated in air or oxygen they burn vigourously forming different types of oxides depending upon the nature of the metal. The formation and stability of these metals can be explained on the basis of size of alkali metal ion and the anion. Peroxides are colourless, while superoxides are coloured. The normal oxides are basic while peroxides and superoxides act as oxidising agents. Na_(2)O_(2) has light yellow colour. This is due to