Silk clothes after every wash becomes more softer and shinier.
When a glass rod is rubbed with a piece of silk cloth, then :
(a) the glass rod and silk cloth both acquire the positive charge.
(b) the glass rod becomes positively charged while the silk cloth has a negative charge.
(c) the glass rod and silk cloth both acquire the negative charge.
(d) the glass rod becomes negatively charged while the silk cloth has a positive charge.
Why do we use blue color solution after washing white clothes?
A washerman adds a little blue indigo after washing white clothes to: