Consider the following statements :
(A) The principal quantum number 'n' is a positive integer with values of 'n' = 1, 2, 3, ...
(B) The azimuthal quantum number 'l' for a given 'n' (principal quantum number) can have values as 'l' = 0, 1, 2, ...... n
(C) Magnetic orbital quantum number 'ml' for a particular 'l' (azimuthal quantum number) has (2l + 1) values.
(D) $$\pm$$ 1/2 are the two possible orientations of electron spin.
(E) For l = 5, there will be a total of 9 orbital
Which of the above statements are correct?
In the structure of SF4, the lone pair of electrons on S is in.
A student needs to prepare a buffer solution of propanoic acid and its sodium salt with pH 4. The ratio of $${{[C{H_3}C{H_2}CO{O^ - }]} \over {[C{H_3}C{H_2}COOH]}}$$ required to make buffer is ___________.
Given : $${K_a}(C{H_3}C{H_2}COOH) = 1.3 \times {10^{ - 5}}$$
Match List - I with List - II :
List-I | List-II | ||
---|---|---|---|
(A) | negatively charged sol | (I) | $$F{e_2}{O_3}\,.\,x{H_2}O$$ |
(B) | macromolecular colloid | (II) | CdS sol |
(C) | positively charged sol | (III) | Starch |
(D) | Cheese | (IV) | a gel |
Choose the correct answer from the options given below: