Arrange the following compounds in the decreasing order of their reactivity towards Nucleophilic substitution reaction:
(A) Bromobenzene
(B) 4-Nitrobromobenzene
(C) 2,4,6-Trinitrobromobenzene
(D) 2,4-Dinitrobromobenzene
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p-block elements are placed in groups 13 to 18 of the periodic table. Group 15 is nitrogen family. Nitrogen makes various compounds like \(NH _3, HNO _3, N_2 O , NO _2\) etc. Phosphorus exists in the form of white and red phosphorus. White phosphorus glows in dark. \(PH _3\) gas is used as smoke screen. Group 16 is called oxygen family. Dry air contains \(21\% O_2\) gas by volume. Combined sulphur exists as sulphates such as gypsum, epsome salt, baryte etc. The allotropic forms of sulphur are Rhombic and monoclinic sulphur. \(S_2\) is paramagnetic like \(O_2\) and it stable at high temperature. Group 17 is Halogen family. \(F_2\) is highly reactive, \(C l_2\) is greenish yellow gas. Both \(S O_2\) and \(C l_2\) are used for bleaching. Group 18 is Noble gas family but some noble gases also form compounds.
Complete hydrolysis of \(XeF _6\) gives HF and \(XeO _3\) as main products.
The product of complete hydrolysis of \(XeF _6\) in the following reaction is
\(XeF _6+ H _2 O \rightarrow ?+ HF\)

Match List I with List II

LIST I	LIST II
A. Serotonin	I. Antihistamine
B. Phenelzine	II. Antibiotic
C. Terfenadine	III.Tranquilizer
D. Vancomycin	IV. Anti depressant drug

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What is the IUPAC name of Oxalic acid?

Match the property given in List-l with the element given in List-Il

List-I (Property)	List-ll (Element)
(A) Lanthanoid, which can show +2 oxidation state	(I) Pm
(B) Radioactive lanthanoid	(II) Lu
(C) Lanthanoid which has \(4 f^{\wedge} 7\) electronic configuration in +3 oxidation state	(III) Eu
(D) Lanthanoid which has \(4 f^{\wedge}\{14\}\) electronic configuration in +3 oxidation state	(IV) Gd

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Pick the reactions which can be used to distinguish between n-propyl alcohol and isopropyl alcohol.
(A) Haloform reaction
(B) Dehydration
(C) Dehydrogenation with \(\mathrm{Cu} / 573 \mathrm{~K}\)
(D) Oxidation with \(\mathrm{CrO}_3\)
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\(^{70}Yb^{2+}\) and \(^{71}Lu^{3+}\) Lanthanoid ions are..........

The karyotype in klinefelter's syndrome is:

Identify the correct sequence of occurrence of geological period from recent to oldest time?
(A) Permian
(B) Jurassic
(C) Silurian
(D) Devonian
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Coupling of benzene diazonium chloride with phenol yields colored compounds called azo dyes. The reaction requires

Read the passage carefully and answer the Questions
The concentration dependence of the rate of a reaction is called the differential rate equation. It is not always convenient to determine the instantaneous rate, as it is measured by calculating the slope of the tangent at point 't' in the concentration vs time plot. This makes it difficult to determine the rate and hence the order of the reaction. This difficulty is overcome by integrating the differential rate equation. This integrated rate equation gives a direct relation between concentrations at different times and the rate constant. The integrated rate equations are different for the reactions having different reaction orders.
Choose the correct statement regarding kinetics of a chemical reaction.

The half-cell reaction is the one that:

In the middle of the depletion layer of a reverse biased p-n junction, the: