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Explain the following observations:
(i) Generally there is an increase in density of elements from titanium (Z = 22) to copper (z =29) in the first series of transition elements.
(ii) Transition elements and their compounds are generally found to be good catalysts in chemical reactions.
The spectrum of He is expected to be similar to: (1) H (2) Li + (3) Na (4) He + Ans: Li +
What was the calculated ?H value obtained for the reaction NH3 + HCl –› NH4Cl using the thermodynamic data in your lab procedure? The thermodynamic data is: •?H°f for NH3 (aq) = -
A gas is a fluid. It has no resistance to change of shape and will expand indefinitely to fill any container in which is held. The molecules or atoms which make up a gas interact o
How do we prepare trihydric alcohols?
The electronic configuration of copper (29 cu) is: (1)1s 2 , 2s 2 , 2p 6 , 3s 2 , 3p 6 , 3d 9 , 4s 2 (2) 1s 2 , 2s 2 , 2p 6, 3s 2 , 3p 6 , 3d 10 , 4s 1 (3) 1s 2 , 2s
Q. What is the basic structure of Alkynes? Ans. Alcohols have the general chemical formula of ROH. The R stands for the rest of the molecule and is usually an alkyl group
why the hydrogen gases are used platinium plate in she
What are dextrorotary compounds and Levi rotary compounds? Ans) Compounds that rotate the plane polarized light to the right are known as Dextro rotatory compounds and that rota
which typeof allene are optically active
Write down the chemical equations for the total burning of propane and butane gas in air. Show whether the substances are liquid (l), gaseous (g), or solid (s) under
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