As light travels from a denser medium water to a rarer medium air, the light rays undergo refraction and bend away from the normal. To an observer the position of fish in water appears to be raised as shown in ...

The human excretory system consists of a pair of Kidneys, a pair of ureters, urinary bladder and urethra.

The chemical reaction between dilute hydrochloric acid and granulated zinc is represented as: Zn + 2HCl → ZnCl₂ + H₂ ↑ The product zinc chloride, does not turn the reaction milky. Hydrogen gas evolved is colourless and odourless and ...

When Ammonium hydroxide solution is added to aluminium chloride solution, a white precipitate of aluminium Hydroxide is formed along with ammonium chloride solution.

As detergent are basic in nature, the concentration of Hydroxide ions will be high and concentration of hydronium Ions will be less. [Note: When bases are dissolved in water they dissociate into Hydroxide ions]

The pH value of saliva after meal is around 5.8 due to the increased activity of bacteria on the food that we eat at any time.