Q. What is the half life of the longest lived isotope of Francium?
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Q. Which of the following is the strongest base?
Q. The National Chemical Laboratory is situated in
Q. Permanent hardness of water is due to the presence of ?
Q. The other names of gammaxene are- I. γ - BHC II. Lindane III. Aldrin
Q. The difference between explosion and combustion is that
Q. The most abundant element is
Q. Terylene is a condensation polymer of ethylene glycol and which acid?
Q. The substance that contains the maximum amount of nitrogen is
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