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it is impossibe to synthesise orgnic compounds in the lab since life force is essential for their formation -theory is known as
Qualitative analysis- Criteria of purity of organic compound The qualitative analysis of an organic compound includes the detection of all the elements that are present in it
The magnetic quantum number of valence electron of sodium (Na) is: (1) 3 (2) 2 (3) 1 (4) 0 Ans: 0
Importance of Chemistry in Life - Chemistry in Action Chemistry plays vital role in our regular life from the starting, it has been in the service of mankind. Our daily needs o
Q. What are Hexahalides? Hexahalides: S, Se-and Te react with excess of fluorine to give the corresponding hexafluorides. Fluorine being the most electronegative oxidises the
The wave nature of an electron was first given by: (1) De-Broglie (2)Heisenberg (3)Mosley (4)Sommerfield Ans: De-Broglie
A cricket ball of 0.5 kg is moving with a velocity of 100 m/ sec . The wavelength associated with its motion is: (1) 1/ 100cm (2) 6.6 x10 -34 m
For the energy levels in an atom, which one of the following statements is correct: (1) There are seven principal electron energy levels (2) The second principal energy leve
A moving particle may have wave motion, if: (1) Its mass is very high (2) Its velocity is negligible (3) Its mass is negligible (4) Its mass is very high and velocity
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