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The radius of electron in the first excited state of hydrogen atom is:
(1) a0
(2) 4a0
(3) 2a0
(4) 8ao
Ans: 4a0
How many moles of copper will be produced from 2.00 moles of aluminum?
When heated calcium hydroxide as well as ammonium chloride reacts to produce water vapor ammonia gas and solid calcium chloride. Presume 5.00g of calcium hydroxide as well as 10.00
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Uses of Acetic anhydride (a) Acetic anhydride is used as an acetylating agent. (b) Acetic anhydride is used for the detection and estimation of hydroxyl and amino group.
Molecular weight of orthophosphoric acid is M. Its equivalent weight is
What is the foundation of classification of cold and hot working? Cold and hot working: Changing the shape of material by extrusion, forging, rolling, drawing involves pl
which postulate of daltons theory can explain the law of definite proportions
Co2 is isostructural with: (1) SnCl 2 (2) So 2 (3 ) HgCl 2 (4) All the above ans: HgCl 2
C2H5OH -> CO2(g) + H2O(g)
what is primary standard and secondary standard?
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