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The nucleus of the element 21 E 45 contains: (1) 45 protons and 21 neutrons (2) 21 protons and 24 neutrons (3) 21 protons and 45 neutrons (4) 24 protons and 21 n
By the action of CO on methyl alcohol Methyl alcohol and carbon monoxide react together under a pressure of 30 atmospheres and 200°C in presence of a catalyst cobalt octacarbon
what acid would be added to limestone to form calcium chloride
The magnetic quantum number for valency electrons of sodium is: (1) 3 (2) 2 (3) 1 (4) 0 Ans: 0
find the rate constant of first order reaction if 75% of reaction is completed in 6.03 sec
Q. Physical Properties of group16? Similar to the groups discussed earlier. The metallic character in Group 16, increases with increasing atomic number. Oxygen and sulphur are
Simple crystallisation - Purification of organic compounds This is the most general technique used to purify organic solids. It is associated with the concept that whenever
The molecular formula of chloride of a metal M is MCl3 The formula of its carbonate would be: (1) MCO 3 (2) M 2 (Co
laws of chemical combination on report
Q. What do you mean by Rounding off numbers? Rounding off numbers while you report a calculation your answer should have no more significant figures than the piece of data yo
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