Primary Alkyl halide \(C _4 H _9 Br (X)\) reacts with alcoholic KOH to give the compound \((Y)\). Compound \((Y)\) is reacted with HBr to give \((Z)\) which is an isomer of \((X)\). When \((X)\) is reacted with \(Na /\) dry ether, it gives a compound \((T), C _8 H _{18}\), which is different from the compound formed when \(n\)-butyl bromide is reacted with \(Na /\) dry ether. The correct IUPAC name of (T) is:

The substance having the same value of van't Hoff factor as that of \(K_4[Fe(CN)_6]\) is :

Werner was the first to describe the bonding features in coordination compounds. But his theory could not answer basic questions like :
(i) Why only certain elements possess the remarkable property of forming coordination compounds ?
(ii) Why the bonds in coordination compounds have directional properties ?
(iii) Why coordination compounds have characteristics magnetic and optical properties ?
Many approaches have been put forth to explain the nature of bonding in coordination compounds viz. Valence Bond Theory (VBT), Crystal Field Theory (CFT), Ligand Field Theory (LFT) and Molecular Orbital Theory (MOT).
We shall focus our attention on elementary treatment of the application of VBT and CFT to coordination compounds.
According to this theory, the metal atom or ion under the influence of ligands can use its ( \(n -1\) )d, ns np or ns, np, nd orbitals for hybridisation to yield a set of equivalent orbitals of definite geometry such as octahedral, tetrahedral, square planar and so on.
These hybridised orbitals are allowed to overlap with ligand orbitals that can donate electron pairs for bonding.
The formula which correctly represents Potassium tetra hydroxo zincate (II) is :

Match List - I with List - II.

List - I	List - II
(A) Zero order reaction	(I) \(s ^{-1}\)
(B) First order reaction	(II) \(mol ^{-2} L^2 s^{-1}\)
(C) Second order reaction	(III) \(mol L ^{-1} s^{-1}\)
(D) Third order reaction	(IV) \(mol ^{-1} Ls ^{-1}\)

Choose the correct answer from the options given below :

Answer the question on the basis of passage given below:
Second period elements of p-Block differs from the rest of their group members due to their small atomic size, high electronegativity, high ionization enthalpy and absence of d-orbitals. The elements from the second period like C, N, O have unique property of forming \(p \pi-p \pi\) multiple bonds whereas other heavier elements of p-block form \(d \pi-p \pi\) multiple bonds. This changes the properties of second period elements to great extent. Also the single bond strength of the p-block elements with their own atoms gets affected by their atomic size and presence of lone pairs.
Inert pair effect also affects the properties of the p-Block elements especially for those elements which are present from 4th period onward and this happens due to poor screening effect of inner (n-1)d subshell electrons.
Catenation tendency of Nitrogen is weaker than Phosphorus, because

Match List-I and List-II.

List-I	List-II
(A) Adenine	(I) Purine
(B) Thymine	(II) Pyrimidine
(C) Uracil	(III) RNA
(D) Deoxyribose	(IV) DNA

Choose the correct answer from the options given below :

Match List-I with List-I

LIST – I (Common Name)	LIST – II (IUPAC Name)
(A) oxalic acid	(I) Ethanedioic acid
(B) Adipic acid	(II) Alpha - hydroxy propanoic acid
(C) Lactic acid	(III) Hexanedioic acid
(D) Phthalic acid	(IV) Benzene-1,2-dicarboxylic acid

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Mercury is the only liquid metal at room temperature due to:

Which one of the following features of pea plant is not suitable for genetical studies?

The Value of \(\int_1^3|2 x-1| d x\) equal to

Arrange the following steps of gene therapy for Adenosine deaminase deficiency in sequence.
(A) Patients lymphocytes are grown in culture outside the body
(B) Functional ADA cDNA is introduced into lymphocytes using retroviral vector
(C) Lymphocytes are taken from the blood of the patient
(D) Genetically engineered lymphocytes introduced back to the patient body
Choose the correct answer from the options given below :

Reduction of nitrobenzene by which of the following reagent does not give aniline?

Transgenic animals that produce useful biological products can be created by the introduction of the portion of DNA (or genes) which codes for a particular product such as human protein (α-1-antitrypsin). This protein is used to treat: