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Which of the following compounds are covalent:
(1) H2
(2) CaO
(3) KCL
(4) Na2S
Ans: H2
The number of unpaired electrons in a chromic ion Cr 3+ (atomic number = 24) is: (1) 6 (2) 4 (3) 3 (4) 1 Ans: 3
Lithium aluminum hydride Lithium aluminum hydride reduces the carbonyl group to an alcohol.
standard estimation protocol
When does intrinsic semiconductor become an extrinsic semiconductor? Illustrate. Semiconductor doping is the process which changes an intrinsic semiconductor to an extrinsic se
how many mole ratios can be obtained from the following equation? Na2S+Cd(NO3)2-2NaNo3+CdS
Can I get a compound from crude extract of plant by NMR and GC-MS?
Classification of proteins - Conjugated proteins The molecules of conjugated proteins are made up of simple proteins and non protein material. The non-protein material is known
copper reacts with oxygen to form two oxide X and Y .On analysis 1.535g of X yielded 1.365g of copper and 1.450g of Y yielded 1.160g of copper. [I] determine the chemical formula o
list the physical properties of two examples of metallic and non metallic elements
If hydrogen atom is in an energy level represented by n=4,how many spectral lines are possible in its emission spectrum? Solution) There is a formula for this i.e [ (n 2 - n 1
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