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How do you explain in the absence of aldehyde group in the pentaacetate of D-glucose? Ans) when you react glucose with acetic anhydrate it forms pentaacetate with 5 OH grops it
How many unpaired electrons are present in Ni 2+ cation (atomic number = 28): (1) 0 (2) 2 (3) 4 (4) 6 Ans: 2
5H is the most stable, and the least stable isotope is 7H
The ketone is more stable than its enol Because the ketone is more stable than its enol, more energy must be expended for it to ionize. Consequently, the ketone is less aci
When an electron revolves in a stationary orbit then: (1) It absorbs energy (2) It emits radiation (3) Its energy remains constant (4 )It gains kinetic energy Ans:
What are similarities and differences of primitive cells and unit cells? Ans: Unit cell is the basic building block of a crystal, repeated infinitely in three d
An electron having the quantum numbers n=1, l=3, m=0 s= -1/2 , would be in the orbital: (1) 3s (2) 3p (3) 4d
Methods yielding mixture of amines - Hofmann's method Hofmann's method: The mixture of amines (1°, 2° and 3°) is made by the alkylation of ammonia along with alkyl halides.
what are the acid refractory and its application and examples?
(a) Assign a reason for each of the following statements: (i) Alkylamines are stronger bases than arylamines. (ii) Acetonitrile Is preferred as solvent for carrying out sever
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