The boiling point elevation constant \(K_b\) is also known as:

Arrange the following compounds in decreasing order of their boiling points:
A. Ethoxyethane
B. n-Butane
C. Pentanal
D. Pentan-1-ol
Choose the correct answer from the options given below

In the following reaction, identify Product 'A' :
\(Phenol\ \xrightarrow[(3)\ HCl]{(1)\ NaOH, (2)\ CO_2}\ A\)

"The amines which are soluble in water
(A) Methanamine
(B) Ethanamine
(C) Propanamine
(D) Benzylamine
Choose the correct answer from the options given below:"

What is the correct Nernst equation for the following cell?
Zn(s)|Zn²⁺||Ag⁺|Ag(s)

The reagent involved in Lucas test is

The specific rate constant of a first order reaction depends on the

Match List-I with List-II

List-I (Compound)	List-II (Uses)
(A) Diazonium salt	(I) Surfactants
(B) Novocain	(II) Antihistaminic drug
(C) Benadryl	(III) Dentistry
(D) Quaternary ammonium salts	(IV) Dyes

Choose the correct answer from the options given below:

Arrange the steps involved in retroviral infection of an animal cell in a sequencial order :
(A) More virus particles are made.
(B) Virus eventually enters T-lymphocytes.
(C) Viral DNA incorporated in host DNA.
(D) RNA of HIV enters macrophages.
(E) By reverse transcription viral RNA forms viral DNA.
Choose the correct answer from the options given below:

Answer the question on the basis of passage given below :
One of the notable features of the transition element is the great variety of oxidation states it may show in its compounds. The elements which give the greatest number of oxidation states occur in or near the middle of the series. Manganese, for example exhibits all the oxidation states from +2 to +7. The lesser number of oxidation states at the extreme ends is either due to losing or sharing of few electrons (Sc, Ti) or too many d electrons of higher valence. Early in the first series scandium (II) is virtually unknown and titanium (IV) which is more stable than Ti (III) or Ti (II). On the other end, the only oxidation state of zinc is \(+ 2\).
Oxidation state of scandium is

Two charges \( 5 \mu C \) and \( - 2 \mu C \) (with no external field) are placed at \( (-9 \text{ cm}, 0, 0) \) and \( (9 \text{ cm}, 0, 0) \) respectively. The work required to separate the two charges infinitely away from each other is :

Value of \(\int\left(\frac{1}{\log x}-\frac{1}{(\log x)^2}\right) d x\) is

Read the passage carefully and answer the questions
The coordination compounds are of great importance. These compounds are widely present in the mineral, plants and animal world and are known to play many important functions in the area of analytical chemistry, metallurgy, biological systems, industry and medicine. For example, coordination compounds find use in many qualitative and quantitative chemical analysis. Some important metal extraction and purification make use of complex formation. Hardness of water can be estimated by stable complex formation of Ca\(^{2+}\) and Mg\(^{2+}\)
Impure nickel is converted to which of its complex to be decomposed to yield pure nickel?