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In A Reaction Between A And B, The Initial Rate Of Reaction (R0) Was Measured
Chemistry · Chapter 3
Two Charges 5 × 10–8 C And –3 × 10–8 C Are Located 16 Cm Apart. At
Physics · Chapter 2
Complete Each Synthesis By Giving Missing Starting Material, Reagent Or Products
Chemistry · Chapter 8
A Hydrogen Atom Initially In The Ground Level Absorbs A Photon,
Physics · Chapter 12
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Q75.Total number of non bonded electrons present in NO2− ion based on Lewis theory is 2025 (29 Jan Shift 2) JEE Main Previous Year Paper
Q74.In the Claisen-Schmidt reaction to prepare, dibenzalacetone from 5.3 g of benzaldehyde, a total of 3.51 g of product was obtained. The percentage yield in this reaction was ______ %.
Q73.Consider the following low-spin complexes K3 [Co(NO2)6], K4 [Fe(CN)6], K3 [Fe(CN)6], Cuu2 [Fe(CN)6] and Zn2 [Fe(CN)6] The sum of the spin-only magnetic moment values of complexes having yellow colour is. _____ B.M. (answer in nearest integer)
Q72.Isomeric hydrocarbons → negative Baeyer's test (Molecular formula C9H12 ) The total number of isomers from above with four different non-aliphatic substitution sites is -
Q71.In the sulphur estimation, 0.20 g of a pure organic compound gave 0.40 g of barium sulphate. The percentage of sulphur in the compound is ______ ×10−1% . (Molar mass : O = 16, S = 32, Ba = 137 in gmol−1 ) 2025 (29 Jan Shift 2) JEE Main Previous Year Paper