Arrange the following in decreasing order of the \(\text{pK}_\text{b}\) value :
(A) \(\text{C}_2\text{H}_5\text{NH}_2\)
(B) \(\text{C}_6\text{H}_5\text{NHCH}_3\)
(C) \((\text{C}_2\text{H}_5)_2\text{NH}\)
(D) \(\text{C}_6\text{H}_5\text{NH}_2\)
(E) \((\text{CH}_3)_3\text{N}\)
Choose the correct answer from the options given below :

Edema is caused by

A galvanic cell converts:

Arrange the following ligands in the increasing order of their field strength:
(A) en
(B) edta \({ }^{4-}\)
(C) \(S ^{2-}\)
(D) \(OH ^{-}\)
Choose the correct answer from the options given below:

Which of the following elements does not show allotropy?

Match List-l with List-ll:

List-l (Representation)	List-II (Common name)
(A) \(10^{-6} M\) solution	(I) Decimolar solution
(B) 0.1 M solution	(II) Micromolar solution
(C) 0.001 M solution	(III) Millimolar solution
(D) 0.01 M solution	(IV) Centimolar solution

Choose the correct answer from the options given below:

The oxidation state, geometry and number of unpaired electrons in \([Cr(NH_3)_6]^{3+}\) is :

Read the following passage carefully and answer the given questions.
The B-lymphocytes produce an army of proteins in response to pathogens. Each antibody molecule has four peptide chains, two small called light chains and two longer called heavy chains. Virus-infected cells secrete proteins called interferons which protect non-infected cells from further viral infection. Symptoms of allergic reactions include sneezing, watery eyes, running nose and difficulty in breathing. The use of drugs like anti-histamine, adrenalin and steroids quickly reduce the symptoms of allergy. Lymphoid organs are the organs where origin and/or maturation and proliferation of lymphocytes occur. The primary lymphoid organs are bone marrow and thymus. After maturation the lymphocytes migrate to secondary lymphoid organs like spleen, lymph nodes, tonsils, Peyer's patches of small intestine and appendix. Heroin commonly called smack is chemically diacetylmorphine which is a white, odourless, bitter crystalline compound. This is obtained by acetylation of morphine, which is extracted from the latex of poppy plant Papaver somniferum.
Which one of the followings drug does not reduce the symptoms of allergy quickly?

If A is a square matrix and I is the identify matrix of same order such that \(A ^2= I\), then \(3( A - I )^3+3( A + I )^3-15 A\) is equal to

The de Broglie wavelength of an electron, a proton, and an alpha particle are represented by \(\lambda_e, \lambda_p, \lambda_\alpha\) respectively. If kinetic energy of electron, proton and alpha particle is same, then which of the following is correct.

If a random variable \(X\) has the following probability distribution :

X	0	1	2	3	4
P(X)	k	2k	3k	\(k^2\)	\(6 k^2\)

then Match List-I with List-II

List-I	List-II
(A) k	(I) 3/7
(B) \(P(x<2)\)	(II) \(6 / 49\)
(C) \(P(X>3)\)	(III) \(1 / 7\)
(D) \(P(2 \leq X \leq 3)\)	(IV) 22/49

Choose the correct answer from the options given below :

The process of evolution of different species in a given geographical area starting from a point and dispersing to other areas is called as:

Molecules are the constituent particles of molecular solids. Identify the molecular solid amongst the following: