Arrange the following complexes in increasing order of their magnetic moment
(A)\([CoF_6]^{3-}\)
(B) \([Co(H_2O)_6]^{2+}\)
(C)\([FeF_6]^{3-}\)
(D)\([Fe(CN)_6]^{4-}\)
Choose the correct answer from the options given below:

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Organic compounds derived from NH3 by replacing one or more H-atoms with alkyl or aryl groups will form primary, secondary and tertiary amines. The common methods which include their preparations are reduction of nitro group, amide group and nitrile group, Gabriel phthalimide synthesis and ammonolysis of alkyl halides. Amines are basic in nature due to the presence of a lone pair of electrons on the nitrogen atom. Important chemical properties of amines include acylation, alkylation and their interaction with nitrous acid. There are various tests which can distinguish different types of amines from each other, for e.g. carbylamine test, Hinsberg's test, coupling reaction etc. Another important class of compounds which can be derived from primary amines is azo compounds. These compounds are intensely colored and widely used as dyes in textile, leather and food industries.
The final product of the following reaction is:
\(C _6 H _5 NH _2 \xrightarrow[\text { (iii) } NaNO _2 / Cu , \Delta]{\text { (i) } HNO _2}\) (ii) \(HBF _4\) ?

Which of the following metals cannot be used to adsorb H2 gas on its surface?

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Carbonyl compounds such as aldehydes, ketones, and carboxylic acids play an important role in the biochemical process of plants and animal kingdom.
Many aldehydes and ketones find applications in dye, perfumery and other industries.
The carbonyl carbon atom is \(s p^2\)-hybridized forming three sigma and one pi-bond with oxygen.
C-O bonds are polar bond due to high electronegativity of oxygen than carbon.
Hence the carbonyl carbon behaves as an electrophilic center and oxygen as a nucleophilic centre.
Primary and secondary alcohols yield aldehydes and ketones respectively upon oxidation with variety of oxidizing agents.
The boiling points of aldehydes and ketones differ from hydrocarbons and ethers.
Aldehydes and ketones undergo nucleophilic addition reaction due to presence of electrophilic carbonyl carbon.
Nucleophile and a proton add across the carbon oxygen double bond.
The alcohol which cannot be used to prepare carbonyl compound through oxidation is

The standard reduction potential for \(\text{Sn}^{4+}/\text{Sn}^{2+}\) is \(+0.15\text{ V}\) and for \(\text{Cr}^{3+}/\text{Cr}\) is \(-0.74\text{ V}\). These two half-cells, coupled in their standard states, are connected to make a cell. The galvanic cell can be correctly represented by :

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Lyophobic sols like those of metals (Au, Ag, etc) are unstable and are easily precipitated by addition of electrolytes. However, it is observed that the addition of certain lyophilic colloids like gums, soaps, gelatine, etc. to lyophobic colloids (like a metal sol) render lyophobic colloids difficult to coagulate by the addition of electrolytes. The process is known as 'protection' and the lyophilic colloid. colloids are termed as Protective colloids. It is believed that the protective action of the lyophilic colloids is due to the covering up of the particles of the lyophobic colloid by those of the lyophilic Evidenty, smaller the gold number of a protective colloid, the greater is its protective action.
Critical micelle concentration of soap solutions lie in the range of :

Which of the following statements is not correct with reference to a catalyst?

A straight wire of length 2 m and mass 50 g carrying a current of 4 A is balanced in air with the force due to uniform magnetic field acting perpendicular to the length of the wire. The magnitude of magnetic field is:

If the electric field is given by \((6\hat{i} + 3\hat{j} + 4\hat{k}) \text{ V/m}\). The electric flux through a surface of area \(20 \text{ m}^2\) lying in Y-Z plane would be (in V-m).

Match List-l with List-II

List-l (Term)	List-II (Function)
(A) Nuclease	(I) Synthesizes DNA from RNA
(B) Ligase	(II) Have both directions exonuclease activity and synthesize new polynucleotide
(C) DNA Polymerase I	(III) Degrades nucleic acids by breaking phosphodiester bonds
(D) Reverse Transcriptase	IV) Joins DNA molecules together by formation of phosphodiester bonds

Choose the correct answer from the options given below:

Miller's experiment provided evidence for:

Three students, A, B and C can respectively solve \(50\%, 25\%\) and \(20\%\) of the problems in a book. A particular problem is selected at random from the book. The probability that at least one of them will solve the problem is

Complete the reaction:
\(\text{NH}_2\text{CONH}_2 + \text{H}_2\text{O} \rightarrow \text{ ?}\)