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The number of electrons and neutrons of an element is 18 and 20 respectively. Its mass number is: (1) 17 (2) 37 (3)2 (4)38 Ans: 17
Nitric oxide becomes brown when released into the air
Aufbau principle is not satisfied by: (1) Cr and Cl (2) Cu and Ag (3) Cr and Mg (4) Cu and Na Ans: Cu and Ag
Explain the problems of flooding and channeling in packed tower
what are the oxides and halides of d-block elements? mention them groupwise and comment on the stability of their oxidation state.
Which of the sub-shell is circular: (1) 4s (2) 4f (3) 4p (4) 4d Ans: 4s
What property command to water soluble vitamins permits water solubility Ans) Because of 1]OH bond between them 2] polar componets 3] Availibility of in nature
Uses of monohydric alcohol - Uses of ethanol (a) It is used in alcoholic beverages, (b) It is used as a solvent in varnishes, oils, paints, perfumes etc. (c) It is used i
what is the balanced equation of the burning of an unknown hydrocarbon, C4H9 in air
Difference between mesomrism and resonance
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