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During a flame test why is calcium''s flame not persistent, while that of strontium is?
Ans) Because it does not have many ions as compared to the Strontium. It is the ions which produce color.
Q. Halides of Boron and Aluminium? All the elements of Group 13 form binary halides. All the four trihalides of each element are known, with one exception. The compound Tl13 is
What is the nature of urea? Is it acidic basic or neautral how can wr verify it?
Why +ve P.F. gives nuclear instability where as -ve PF gives nuclear stability ?explain .
What is chemical formula for Borax? Ans) Chemical formulae of borax is (Na 2 ) B 4 (O 7 ) .10(H 2 ) O
State about the Point imperfection They are imperfect point-like regions in the crystal. One or two atomic diameters is the typical size of a point imperfection. A substitu
Q. What are the requirements of drinking water? Explain various methods used for the sterilization of water for municipal supply. ANS. Requirements of drinking water: The e
Chromium has the electronic configuration 4s 1 3d 5 rather than4s 2 , 3d 4 because: (1) 4s and 3d have the same energy (2) 4s has a higher energy than 3d (3)4s 1 is
Which geometry does have Formaldehyde molecule The formaldehyde molecule has trigonal planar geometry. Therefore, both the H-C-H bond angle and the H-CAO bond angle are abou
#question.all questions under lanthanides and actinides.
Westron_>zn+alcohol->?
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