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The covalency of nitrogen in HNO 3 is: (1) 0 (2) 3 (3) 4 (4) 5 Ans: 5
properties of s block elements (point wise)
Which of the following are isoelectronic species I= CH + 3 , II-NH 2 , III- NH + 4 , IV-NH 3 (1) I, II, III (2) II, III, IV (3) I, II
Number of protons, neutrons and electrons in the element 231/89 y is: (1) 89, 231, 89 (2) 89, 89, 242 (3) 89, 142, 89 (4) 89, 71, 89 Ans: 89, 142, 89
what r significanc of law of succive disintegration
what is the atomic weight of oxygen
Which type of bonding exists in Li 2 o and CaF 2 respectively : (1) Ionic, ionic (2) Ionic, covalent (3) Covalent, ionic
physical properties
The sulphate of a metal has the formula M 2 (SO 4 ) 3 . The formula for its phosphate will be: (1) M(HPO 4 ) 2 (2) M 3 (PO
The phosphate of a metal has the formula MPO4 .The formula of its nitrate will be: (1) MNO 3 (2) M 2 (NO 3 ) 2
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