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The atomic number of an element is 17. The number of orbitals containing electron pairs in its valence shell is:
(1) Eight
(2) Six
(3) Three
(4) Two
Ans: Three
A reverse osmosis membrane is used to desalinate high salinity groundwater. It is proposed to build an RO plant that will process about 500,000 liters/day of saline feed water cont
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Pick out the isoelectronic structures from the following : CH + 3 , H 3 O + NH 3 CH - 3 I
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What is Allotropy If the change in structure is reversible then the polymorphism is called as 'allotropy'.Allotropy (Gr. allos, other, and tropos, manner) is a behavior exhibi
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The postulate of Bohr theory that electrons jump from one orbit to the other, rather than flow is according to : (1) The quantisation concept (2) The wave nature of elect
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