Which sodium halide is employed in Finkelstein reaction?

In the following reaction, identify Product 'A' :
\(Phenol\ \xrightarrow[(3)\ HCl]{(1)\ NaOH, (2)\ CO_2}\ A\)

Catalytic hydrogenation of ketones with lithium aluminium hydride gives

Which transition metal ion is most stable against oxidation to its +3 state?

Match List-I with List-II

LIST – I (Electrolytes)	LIST – II (Examples)
(A) Non-electrolyte	(I) Sucrose, urea
(B) Binary electrolyte	(II) KCl, \(CH _3 COOH\)
(C) Quaternary electrolytes	(III) \(H _2 SO _4\) \(BaCl _2\)
(D) Ternary electrolyte	(IV) \(AlCl _3\) \(K _3 PO _4\)

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Match List-l with List-ll:

List-1 (Molecule)	List-II (Van't Hoff Factor)
(A) Glucose	(I) 3
(B) \(K _2 SO _4\)	(II) 5
(C) \(Ca _3\left( PO _4\right)_2\)	(III) 1
(D) \(K _3\left[ Fe ( CN )_6\right]\)	(IV) 4

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Answer the question on basis of passage given below:
Organic compounds containing carbon -oxygen double bonds ( \(C = O\) ) are called carbonyl compounds. These are highly polar molecules. Hence, their boiling points are higher than hydrocarbons and ethers. Aldehydes can be prepared from dehydrogenation or oxidation of alcohols and by reduction of acylhalides. Ketones are prepared by oxidation of secondary alcohols or by hydration of alkynes etc. Aldehydes and ketones undergo nucleophilic addition reaction with the number of nucleophiles such as HCN , NaHSO 3 ammonia derivatives. Carboxylic acids are prepared by the oxidation of primary alcohols, aldehydes and alkenes, by hydrolysis of nitriles. Carboxylic acids are more acidic than alcohols and phenols.
The correct sequence of reagents for the conversion of \(3\)-nitrobromobensene to \(3\)-nitrobensoic acid is:

The area (in square units) bounded by the curve \(y=\cos x\) between \(x=0\) and \(x=2 \pi\) in first quadrant is equal to :

Arrange the steps of gel electrophoresis in a proper sequence :
(A) Fragments of DNA are separated under an electric field in agarose gel
(B) DNA bands are cut out from the agarose gel and extracted
(C) DNA fragments are visualized by exposure to UV radiation
(D) Separated DNA fragment stained with ethidium bromide
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Which of the following statements are correct with respect to T.H. Morgan?
(A) His experiment led to discovering the basis for the variation that sexual reproduction produced.
(B) He mapped the position of genes on the chromosomes.
(C) He coined the term linkage.
(D) He crossed yellow-bodied, white-eyed Drosophila females to brown-bodied red-eyed Drosophila males and observed the results contrary to that of Mendel's.
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The role of ethidium bromide in gel electrophoresis is:

The correct 4f sub-shell electronic configuration of Yb²⁺ion is

Identify the correct statement(s).
(A) In any lens, the optical centre is always at the centre of the lens.
(B) In a lens, if the curvature of its two surfaces is equal, the optical centre is at the centre of the lens.
(C) A light ray passing through the optical centre of a lens never shifts from the direction of the incident ray.
(D) A ray of light incident perpendicularly on a lens passes through its focus after refraction.
Choose the correct answer from the following given options.