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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
Polyethylene: Polyethylene are formed by polymerization of ethylene under high pressure and at moderately high temperature. The resulting polymers are then subjected to substituti
Which of the following substances has covalent bonding: (1) Germanium (2) Sodium chloride (3) Solid neon (4) Copper Ans: Germanium
bohr model for hydrogen atom?
Leibermann nitro test why we add concentrated acid
how a catalyst perform its work
Q. What do you mean by electro-magnetic radiation? In the untimely twentieth century scientists accepted the idea that an atom consisted of a massive positively charged nucleus
Q. What is basic need of SI Units? Ans: The Importance of Units Units give numbers a particular meaning. Example: I am 5 feet 10 inches tall. Feet and inches are units. I co
Q. In 1982, the International Union of Pure and Applied Chemistry recommended that the value of the standard pressure p o be changed from 1 atm to 1 bar. This change affects the
A sub-shell l= 2 can take how many electrons: (1) 3 (2) 10 (3) 5 (4) 6 Ans: 10
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