Mercury
Lithium
Lead
Silver
Which of the metals remain in liquid for under normal conditions
Potassium Permanganate is used for purifying drinking water
Which of the following is an element
What is the unit for measuring the amplitude of a sound ?
Reading of a barometer going down is an indication of
Decibel is the unit for
One fathom is equal to
Fathom is the unit of
Light year is a measurement of
Very small time intervals are accurately measure by
