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The valency of phosphorus in H3 PO 4 is: (1) 2 (2) 5 (3) 4 (4) 1 Ans: 5
Q. Show the Oxoacids of Sulphur? As you know, oxoacid is an acid in which the ionisable hydrogen atom is bonded, through an oxygen atom to the central nonmetal atom, e.g., E-OH
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The difference among Threshold energy and average energy of the molecules is known as activation energy.
Q. A sample of water on analysis was found to contain the following analytical data: Mg (HCO 3 ) 3 = 16.8mg/L, MgCl 2 = 19mg/L, Mg (NO 3 ) 2 = 29.6 ppm, CaCO 3 = 20 p
Q. Illustrate modern atomic model of De Broglie? 1. Electrons inhabit the space surrounding the nucleus and can exist in several discrete principal energy levels each designate
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Q. Storehouse of minerals? in addition to the earth's crust, oceans also provide a huge storehouse of minerals in which the metals occur primarily as soluble sulphates and hali
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