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If electron falls from n=3 to n= 2 , then emitted energy is:
(1) 10.2ev
(2) 12.09 ev
(3) 1.9ev
(4)0.65ev
Ans: 10.2ev
Nature of metal carbon bond
The atomic number of an element having the valency shell electronic configuration 4s 2 4p 6 is: (1) 35 (2) 36 (3) 37 (4) 38 Ans: 35
Anomolous behaviour of beryllium
give an example of a compound whose empirical formula & molecular formula are same.
give answer
Chemical Properties Proteins - Salt formation (i) Salt formation : Due to existence of both -NH 2 and -COOH groups in proteins, they make salts along with acids and bases.
explain law of equivalence..
Q. Explain scale formation and sludge formation in boilers. How are they formed? Ans Boilers are used for steam generation. When hard water is evaporated, progressively
what mass of oxygen gas exerts a pressure of 475 mm Hg in a volume of 1.25L at a temperature of -22C
who it whould be make
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