The chemistry of heena (Mehndi)
Heena (Mehndi) is a green natural dye prepared from the plant Lawsonia inermis, that is use…
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The chemistry of heena (Mehndi)
Heena (Mehndi) is a green natural dye prepared from the plant Lawsonia inermis, that is use…
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What is Perfect number?
In number theory , a perfect number is a positive integer that is equal to the sum of it…
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Why does water expand when it freezes?
Why does water expand when it freezes? Water expands when freezes, unlike other substances …
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Can water boil and freeze at the same time? If yes, then why?
Do you ever thought that c an water boil and freeze at the same time? Have you ever ima…
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Armstrong number or narcissistic number
Q. What is Armstrong number or narcissistic number? Ans: A number x is an Armstr…
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Chemistry notes,lecture and books in pdf for different competitive exams
JEE MAIN & ADVANCE ,AIIMS,NEET IIT JAM, UGC NET JRF, GATE and engineering notes,lectures and…
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Physics free study material in pdf for different competitive exam
Physics notes, lecturers,books pdf free download topicwise for JEE MAIN & ADVANCE,NEET,AIIMS,I…
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