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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.
To make an octahesral complex of \(Mg ^{2+}\) ion, how many molecules of \(EDTA\) are used?

Which one of the following is not an application of adsorption?

The edge lengths of the unit cells in terms of the radius of spheres constituting fcc, bcc \& simple cubic unit cell respectively are:

Match List-I (compound) with List-II (reagent or chemical test)

List-I (Compound)	List-II (Reagent or Chemical test)
(A) Phenols	(I) Tollen's test
(B) Amines	(II) \(NeutralFeCl _3 aq\). solution
(C) Aldehydes	(III) Iodoform Test
(D) Methyl Ketones	(IV) Hinsberg's Test

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Read the passage carefully and answer the questions
Carbohydrates are naturally formed organic compounds from various plants. The common chemical formula, \(C _x\left( H _2 O \right)_y\), was considered as hydrates of carbon to derive the various carbohydrates. For instance, the general formula for glucose ( \(C _6 H _{12} O _6\) ) easily fits into the above formula. Carbohydrates also called saccharides are classified on the basis of their behavior towards hydrolysis. Monosaccharides cannot be hydrolyzed further to simpler units of polyhydroxy aldehyde or ketones. About 20 monosaccharides are known to occur in nature. Carbohydrates that yield large number of monosaccharide units are called polysaccharides. Amino acids contain ( \(- NH _2\) ) and ( - COOH ), which can be classified in various forms. Proteins are polymers of alpha amino acids which are connected to each other by a peptide bond or peptide linkage. When a native protein is subjected to physical change, its globules unfold and helix get uncoiled and the protein loses its biological activity. The protein is said to be denaturated.
During denaturation process of protein which structure(s) remain intact ?

From the following statement regarding the order of reaction, the statement that is not true is

The correct order of increasing boiling points of hydrides (given below) of group 15 is:
(A) \(\text{NH}_3\)
(B) \(\text{PH}_3\)
(C) \(\text{AsH}_3\)
(D) \(\text{SbH}_3\)
(E) \(\text{BiH}_3\)
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A vector of magnitude 8 units in the direction perpendicular to both the vectors \(\hat{i}+\hat{j}+\hat{k}\) and \(2 \hat{i}+\hat{k}\) is

Arrange these ions into decreasing order of their ionic radii :
(A) \(\text{Ce}^{3+}\)
(B) \(\text{Pr}^{3+}\)
(C) \(\text{La}^{3+}\)
(D) \(\text{Nd}^{3+}\)
(E) \(\text{Pm}^{3+}\)
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Arrange the given taxa of invertebrates in terms of their increasing numbers.
(A) Other animal groups
(B) Molluscs
(C) Insects
(D) Crustaceans
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Match List-l with List-II

List-l (Product)	List-II (Producer)
(A) Citric Acid	(I) Trichoderma polysporum
(B) Ethanol	(II) Monascus purpureus
(C) Statins	(III) Saccharomyces cerevisiae
(D) Cyclosporin A	(IV) Aspergillus niger

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Which of the following argument supports the conservation of biodiversity from the below statement:
"Waking up to a Bulbul's song in the morning"

Light of frequency \( 8.27 \times 10^{14} \text{ Hz} \) is incident on a metal surface. Electrons with maximum speed \( 6.6 \times 10^5 \text{ m/s} \) are ejected. The threshold frequency for photoemission of electrons will be (given \( h = 6.6 \times 10^{-34} \text{ Js} \), and mass of electron = \( m_e = 9 \times 10^{-31} \text{ kg} \)) :