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An electron has kinetic energy 2.8 x 10 -23 J . de-Broglie wavelength will be nearly: (me: 9.1 x 10 -31 kg) (1) 9.28x 10 -4 m (2) 9.28 x10 -7 m
a. 'Hormones are chemical messengers.' Explain? b. Name the main disease caused due to lack of the vitamin and its source in each of the following: A, B 6 and E.
primary and secondary nitro compounds chemical test..
group1 metal reacts execess of oxygen
The Ca 2+ and Mg 2+ ions in hard water form scum with soap. Therefore they don''t form lather and therefore don''t clean the dirt.
find the rate constant of first order reaction if 75% of reaction is completed in 6.03 sec
why halogens are both +R and -I groups?
Which one is the strongest bond: (1) Br- F (2) F-E (3) Cl-F (4) Br- Cl Ans: Br- F
brief notes &uses
diagonal relationship between b ans si
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