Neutral or weakly alkaline \(KMnO_4\) solution will oxidise iodide ion into :

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There are some deposits of nitrates and phosphates in the earth’s crust. Nitrates are more soluble in water. Nitrates are difficult to reduce under laboratory conditions, but microbes do it easily. Ammonia forms a large number of complexes with transition metals. Hybridisation easily explains the ease of sigma donation capability of NH₃ and PH₃. Phosphine is an inflammable gas, it is prepared from white phosphorus.
NH₃ is a stronger base than PH₃ because:

Aldehydes and ketones undergo

Derive the electronic configuration of \(Ce ^{3+}\) ion by using Hund's rule.

List-I	List-II
(A) Amino acids linked in a specific sequence.	(I) Primary structure of proteins.
(B) Regular folding of a specific sequence of amino acids due to H-bonding.	(II) Secondary structure of proteins.
(C) Fibrous proteins.	(III) Quaternary structure of proteins.
(D) Spatial arrangement of two or more polypeptide chains.	(IV) Tertiary structure of proteins.

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The osmotic pressure of a solution prepared by dissolving \(5 0 ~ m g\) of H2SO4 in 2 liters of water at \(2 5 ^{ \circ } C\) will be

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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\(^{2+}\)
In photography undecomposed AgBr is removed as ___________

Which drug is an effective painkiller for patients who have undergone surgery?

Arrange the following in increasing order of their \(pK _a\) values.
(A) o-nitrophenol
(B) m-nitrophenol
(C) Phenol
(D) Ethanol
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If a line makes angles \(\alpha, \beta, \gamma\) with the positive directions of \(x\)-axis, \(y\)-axis and \(z\)-axis respectively, then \(\sin ^2 \alpha+\sin ^2 \beta+\sin ^2 \gamma\) is equal to:

Identify the correct statement(s) among the following.
1. Electrical conductivity in an intrinsic semiconductor is due to electrons excited from the conduction band to valence band.
2. In germanium atom electrical conductivity is due to intrinsic charge carriers.
3. In doped atoms, the size of the dopant atom should be almost the same as that of the intrinsic crystal.
4. In n-type semiconductor, the donor atom becomes negatively charged.
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A solution of \(\text{AgSO}_4\) is electrolysed for 30 minutes with a current of 5 amperes. What is the mass of silver deposited? (Given At. Mass of Ag = 108 g/mol)

If the straight lines \(x=1+s, y=-3-\lambda s, z=1+\lambda s\) and \(x=\frac{t}{2}, y=1+t, z=2-t\) with parameters s and \(t\) respectively, are coplanar, then \(\lambda\) is equal to :