The correct sequence of steps during the corrosion of iron is
(A) Ferrous ions are oxidized by atmospheric oxygen
(B) Hydrated ferric oxide (Fe2O3 2H2O) formed with production of H+ ions
(C) At a particular spot of iron object, oxidation takes place and that spot behaves as anode
(D) Electron released at anode moves through metal and reduces oxygen in the presence of H+
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Read the passage carefully and answer the questions
The carbonyl group of aldehydes and ketones is highly polar. The positively charged carbon is readily attacked by electron-rich nucleophile and the negatively charged oxygen atom is attacked by an electro-deficient electrophile. Aldehydes and ketones undergo nucleophilic addition reactions in the presence of acid or a base. The mechanism involves attack of a nucleophile on the electron deficient carbonyl carbon to form a tetrahedral intermediate. A new bond is formed between the carbon and oxygen. Protonation of the anion furnished by the reaction medium yields neutral addition product. The addition product is same whether the reaction is catalyzed by acid or a base. For example in the presence of base aldehydes and ketones react with hydrogen cyanide to form cyanohydrin.
Which of the following compounds will undergo nucleophilic addition readily?

The standard Gibbs energy of the following reaction is \(-610 kJ mol ^{-1}\)
\(Mg(s)+2 Ag^{+}(aq) \rightarrow Mg^{2+}(aq)+2 Ag(s)\)
What is the standard EMF for the cell correspondng to the above reaction?
Given: Faraday's constant \(=96500 C mol ^{-1}\)

The presence or absence of hydroxyl group on which carbon atom of sugar differentiate RNA and DNA :

Interstitial compounds are formed when small atoms like H, C, or N are trapped in the crystal lattice of metal. Which of the following statements are true about the interstitial compounds?
(A) Interstitial compounds have higher melting points than the pure metals.
(B) Interstitial compounds are very soft.
(C) Interstitial compounds are very reactive.
(D) Interstitial compounds retain metallic conductivity.
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Arrange the following halocompounds in increasing order of their boiling points
(A) Chloromethane
(B) Bromomethane
(C) Bromoform
(D) Dibromomethane
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The reaction for the conversion of phenol into salicylic acid is known as

A' can run 1 km in 5 minutes 20 seconds and 'B' can run the same distance in 6 minutes. How many meters start can 'A' give 'B' in a kilometer race so that they finish the race together?

216 charged droplets, each of radius r and charge q, are combined to form a big drop. The ratio of potential of the big drop to the small droplet will be :

The mean of the number of heads in a simultaneous toss of three coins is :

If \(A=\left[\begin{array}{lll}2 & -3 & 4\end{array}\right], B=\left[\begin{array}{l}3 \\ 2 \\ 2\end{array}\right]\)
\(X=\left[\begin{array}{lll}1 & 2 & 3\end{array}\right], Y=\left[\begin{array}{l}2 \\ 3 \\ 4\end{array}\right]\)
then \(A B+X Y=\)

Match List-I with List-II

List-I (Name of Compound)	List-II (Application)
(A) Neutral Ferric Chloride	(I) Anaesthetic
(B) Methanol	(II) Detection of Phenolic group
(C) Diethylether	(III) Wood Spirit
(D) Acetylsalicylic acid	(IV) Analgesic

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The self-inductance (L) of a long solenoid on doubling its number of turns and length, keeping other factors constant, will become