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calcium oxide and ammonium chloride
ammonium sulphate and sodium carbonate
calcium carbonate and magnesium carbonate
aragonite and conchiolin
Amalgams are
lightest metal is the
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