Iron and manganese are removed in water by the process of:
Consider the following four particles :
Which of the following is the correct sequence in which their rest-masses increase?
Which among the following thermometers is preferred for measuring temperature around 1250°C?
One light year is equal to
The resistance of a wire that must be placed parallel with a 12 Ω resistance to obtain a combined resistance of 4 Ω is
Non-conductors, whose polarization is caused by an electric field, are known as