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The α -particle scattering experiment of Rutherford concluded that: (1) The nucleus is made up of protons and neutrons (2) The number of electrons is exactly equal to number
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Number of neutrons in heavy hydrogen atom is: (1) 0 (2) 1 (3) 2 (4) 3 Ans: 1
What is difference between silica used in TLC and HPLC column? TLC is called thin layer chromatography. The simple technique works on the principle of adsorption, where as HPLC i
Pennies made after 1982 are made of 97.5% zinc and 2.5% copper instead of 95% copper and 5% zinc. Pree 1982 pennies weighed 3.10g. The penny contained 2.95g of zinc and 0.15g of co
If n+l= 6 , then total possible number of subshells would be: (1) 3 (2) 4 (3) 2 (4) 5 Ans: 3
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Q. Beneficiation of Ores? Most of the ores available in nature contain large amounts of impurities, i.e. gangue. Direct extraction of metals from the ores by metallurgical proc
Q. Why elimination occurs instead of nucleophilic substitution when ethyl chloride reacts with alcoholic potassium hydroxide? Ans: Ethyl chloride can undergo both nucleophilic sub
how do you calculate equivalents?
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