The rate of a gaseous reaction becomes half when the volume of the vessel is doubled. The order of the reaction is

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Amines are considered to be derivatives of ammonia obtained by replacement of hydrogen atoms with alkyl or aryl groups. They are usually prepared from nitro compounds, halides, amides, imides etc. The presence of hydrogen bonding influences its physical properties. In alkylamines, a combination of electron releasing steric and hydrogen bonding factors influences the stability of substituted ammonium cations in protic polar solvents and thus affects the basic nature of amines. Alkyl amines are found to be stronger bases than ammonia which is more basic than water. Primary and secondary amines are engaged in intermolecular association due to hydrogen bonding. This intermolecular association is more in primary amines than in secondary amines. Tertiary amines do not have intermoleulcar association due to the absenceof hydrogen atom available for hydrogen bonding. Thus, the boiling point of amines depends on hydrogen bonding. In aromatic amines, electron releasing and withdrawing groups increase and decrease their basic character. Aryl diazonium salts usually obtained from arylamine undergo replacement of the diazonium group with a variety of nucleophile. Their coupling reaction of aryl diazonium salts with phenol or arylamine results in formation of dyes.
The most basic species in the following is

Which of the following method is used for purification of water

Match the compounds given in List-I with the oxidation state of cobalt present in it given in

List-l (Compound)	List-II (Oxidation state of cobalt)
(A) \(\left[ Co ( NCS )\left( NH _3\right)_5\right]\left( SO _3\right)\)	(I) +3
(B) \(\left[ Co \left( NH _3\right)_4 Cl _2\right] SO _4\)	(II) +2
(C) \(Na _4\left[ Co \left( S _2 O _3\right)_3\right]\)	(III) \(0\)
(D) \(Co _2( CO )_8\)	(IV) \(+4\)

Choose the correct answer from the options given below :

A square planar complex is formed by hybridisation :

The half-life of a first order reaction is \(25\text{ minutes}\). Its rate constant is:

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When a ligand is bound to a metal ion through a single donor atom, it is said to be a unidentate ligand but when it bind through two donor atoms, then it is said to be didentate ligand and when several donor atoms are present in a single ligand, it is said to be a polydentate ligand. When a di- or polydentate ligand uses its two or more donor atoms simultaneously to bind a single metal ion, it is said to be a chelate ligand. The number of such ligating groups is called the denticity of the ligand. ligand which has two different donor atoms and either of the two ligetes in the complex is called ambidentate ligands. The number of ligand donor atoms to which the metal is directly bonded, is called coordination number of the metal ion in the complex. Complexes in which a metal is bound to only one kind of donor groups are known as homoleptic and in which a metal is bound to more than one kind of donor groups are known as heteroleptic complexes.
Which of the following molecule/ion is not expected to behave as a ligand?

Sexual stages of Plasmodium which develop in human RBCs are known as:-

Fe shows extra stability as \(\text{Fe}^{3+}\) due to :

If A is a square matrix of order 3 and \(A ^{\prime}\) is the transpose of A such that \(\left|A^{\prime}\right|=-5\), then \(\left|A A^{\prime}\right|=\)

Let X denotes the number of doublets obtained in 3 throws of a pair of dice.
match List - I with List - II

List - I	List - II
(A) P(X = 0)	(I) \(\frac{1}{216}\)
(B) P(X = 1)	(II) \(\frac{15}{216}\)
(C) P(X = 2)	(III) \(\frac{75}{216}\)
(D) P(X = 3)	(IV) \(\frac{125}{216}\)

Choose the correct answert from the option given below:

Two similar coils of radius r are placed concentrically with their planes at right angles to each other. The currents flowing in them are I and 3I, respectively. The resultant magnetic induction at the centre is

The magnetic field strength in silicon is 1000 A/m. If its magnetic susceptibility is \( -0.3 \times 10^{-5} \), then the intensity of magnetization will be: