The specific sequence in which amino acids are arranged in a protein is called its

The correct name of the given reaction is

$$\mathrm{Ar}-\mathrm{N}_2^{+} \mathrm{X}^{-} \xrightarrow{\mathrm{CuCN} / \mathrm{KCN}} \mathrm{Ar}-\mathrm{CN}+\mathrm{N}_2$$

Out of the following alkenes, the one which will produce tertiary butyl alcohol on acid catalysed hydration is

Auto-oxidation of chloroform in air and light produces a poisonous gas known as

Transition metals are known to make interstitial compounds. Formation of interstitial compounds makes the transition metal

Isotonic solutions have the same

Which of the following cell was used in Apollo space programme?

The rate of a reaction increases sixteen times when the concentration of the reactant increases four times. The order of the reaction is

In which of the following molecules, C atom marked with asterisk is chiral?

Which of the following species can act as the strongest base?

Dilution affects both conductivity as well as molar conductivity. Effect of dilution on both is as follows:

Van't Hoff factor for $\mathrm{Na}_2 \mathrm{SO}_4 \cdot 10 \mathrm{H}_2 \mathrm{O}$ solution, assuming complete ionization is

Assertion (A): Zr and Hf are of almost similar atomic radii.

Reason (R): This is due to lanthanoid contraction.

Assertion (A): The units of rate constant of a zero order reaction and rate of reaction are the same.

Reason (R): In zero order reaction, the rate of reaction is independent of the concentration of reactants.

Assertion (A): Inversion of configuration is observed in $\mathrm{S}_{\mathrm{N}} 2$ reaction.

Reason (R): The reaction proceeds with the formation of carbocation.

Assertion (A): p-methoxyphenol is a stronger acid than $p$-nitrophenol.

Reason (R): Methoxy group shows + I effect whereas nitro group shows -I effect.

State:

(a) Kohlrausch law of independent migration of ions.

(b) Faraday's first law of electrolysis.

Classify the following sugars into monosaccharides and disaccharides:

Galactose, Glucose, Lactose and Maltose

(a) Carry out the following conversions:

(i) Nitrobenzene to Aniline

(ii) Aniline to Phenol

OR

(b) (i) Write a chemical test to distinguish between Dimethyl amine and Ethanamine.

(ii) Write the product formed when benzene diazonium chloride is treated with KI.

Show that in case of a first order reaction, the time taken for completion of $99 \%$ reaction is twice the time required for $90 \%$ completion of the reaction. $(\log 10=1)$

Resistance of a conductivity cell filled with 0.2 mol $\mathrm{L}^{-1} \mathrm{KCl}$ solution is $200 \Omega$. If the resistance of the same cell when filled with $0.05 \mathrm{~mol} \mathrm{~L}^{-1} \mathrm{KCl}$ solution is 620 , calculate the conductivity and molar conductivity of $0.05 \mathrm{~mol} \mathrm{~L}^{-1} \mathrm{KCl}$ solution. The conductivity of 0.2 $\mathrm{mol} \mathrm{L}^{-1} \mathrm{KCl}$ solution is $0.0248 \mathrm{~S} \mathrm{~cm}^{-1}$.

Write the IUPAC names of the following coordination compounds (any three):

(a) $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}\left(\mathrm{NO}_2\right)\right] \mathrm{Cl}$

(b) $\left[\mathrm{Ni}\left(\mathrm{NH}_3\right)_6\right] \mathrm{Cl}_2$

(c) $\mathrm{K}_3\left[\mathrm{Cr}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]$

(d) $\left[\mathrm{Co}(\mathrm{en})_2 \mathrm{Br}_2\right]^{+}$

Give the structure of the major product expected from the following reactions:

(a) Reaction of ethanal with methyl-magnesium bromide followed by hydrolysis.

(b) Hydration of But-1-ene in the presence of dilute sulphuric acid.

(c) Reaction of phenol with bromine water.

Draw the structures of major product(s) in each of the following reactions:

Calculate the emf of the following cell:

$$\mathrm{Ni}(\mathrm{~s})+2 \mathrm{Ag}^{+}(0.01 \mathrm{M}) \rightarrow \mathrm{Ni}^{2+}(0.1 \mathrm{M})+2 \mathrm{Ag}(\mathrm{~s})$$

Given that $\mathrm{E}_{\text {cell }}^{\circ}=1.05 \mathrm{~V}, \log 10=1$

Account for the following:

(a) Haloalkanes react with AgCN to form isocyanide as main product.

(b) Allyl chloride shows high reactivity towards $\mathrm{S}_{\mathrm{N}} 1$ reaction.

(c) Haloarenes are extremely less reactive towards nucleophilic substitution reactions.

The rate constant of a reaction quadruples when the temperature changes from 300 K to 320 K . Calculate the activation energy for this reaction. $\left[\log 2=0.30, \log 4=0.60,2.303 \mathrm{R}=19.15 \mathrm{~J} \mathrm{~K}^{-1} \mathrm{~mol}^{-1}\right]$

A compound ' X ' with molecular formula $\mathrm{C}_3 \mathrm{H}_9 \mathrm{~N}$ reacts with $\mathrm{C}_6 \mathrm{H}_5 \mathrm{SO}_2 \mathrm{Cl}$ to give a solid, insoluble in alkali. Identify ' X ' and give the IUPAC name of the product. Write the reaction involved.

The oxidation number of the central atom in a complex is defined as the charge it would carry if all the ligands are removed along with the electron pairs that are shared with the central atom. Similarly the charge on the complex is the sum of the charges of the constituent parts i.e. the sum of the charges on the central metal ion and its surrounding ligands. Based on this, the complex is called neutral if the sum of the charges of the constituents is equal to zero. However, for an anion or cationic complex, the sum of the charges of the constituents is equal to the charge on the coordination sphere.

Based on the above information, answer the following questions:

(a) Define ambidentate ligand with an example.

(b) What type of isomerism is shown by

$$\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5 \mathrm{Cl}\right] \mathrm{SO}_4 \text { and }\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5 \mathrm{SO}_4\right] \mathrm{Cl} \text { ? }$$

(c) Define chelate effect. How it affects the stability of complex?

OR

(c) Find the coordination number and oxidation state of chromium in $\mathrm{Na}_3\left[\mathrm{Cr}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]$.

Certain organic compounds are required in small amounts in our diet but their deficiency causes specific disease. These compounds are called vitamins. Most of the vitamins cannot be synthesized in our body but plants can synthesize almost all of them. So they are considered as essential food factors. However, the bacteria of the gut can produce some of the vitamins required by us. All the vitamins are generally available in our diet. The term 'vitamin' was coined from the words vital + amine, since the earlier identified compounds had amino group. Vitamins are classified into two groups depending upon their solubility in water or fat namely-fat soluble vitamins and water soluble vitamins.

Answer the following questions:

(a) What is the other name of vitamin $\mathrm{B}_6$ ?

(b) Name the vitamin whose deficiency causes increased blood clotting time.

(c) Xerophthalmia is caused by the deficiency of which vitamin? Give two sources of this vitamin.

OR

(c) Why can't vitamin C be stored in our body? Name the disease caused by the deficiency of this vitamin.

Attempt any five of the following:

(a) $\mathrm{Ce}(\mathrm{III})$ is easily oxidised to $\mathrm{Ce}(\mathrm{IV})$. Comment.

(b) $\mathrm{E}^{\circ}\left(\mathrm{Mn}^{2+} / \mathrm{Mn}\right)$ is -1.18 V . Why is this value highly negative in comparison to neighbouring $d$ block elements?

(c) Which element of $3 d$ series has lowest enthalpy of atomisation and why?

(d) What happens when sodium chromate is acidified?

(e) $\mathrm{Zn}, \mathrm{Cd}$ and Hg are soft metals. Why?

(f) Why is permanganate titration not carried out in the presence of HCl ?

(g) The lower oxides of transition metals are basic whereas the highest are amphoteric/acidic. Give reason.

(a) (i) Ishan's automobile radiator is filled with 1.0 kg of water. How many grams of ethylene glycol (Molar mass $=62 \mathrm{~g} \mathrm{~mol}^{-1}$ ) must Ishan add to get the freezing point of the solution lowered to $-2.8^{\circ} \mathrm{C}$. $\mathrm{K}_{\mathrm{f}}$ for water is $1.86{\mathrm{~K} \mathrm{~kg} . \mathrm{mol}^{-1} \text {. }}$

(ii) What type of deviation from Raoult's law is shown by ethanol and acetone mixture? Give reason.

OR

(b) (i) Boiling point of water at 750 mm Hg pressure is $99.68{ }^{\circ} \mathrm{C}$. How much sucrose (Molar mass $=342 \mathrm{~g} \mathrm{~mol}^{-1}$ ) is to be added to 500 g of water such that it boils at $100{ }^{\circ} \mathrm{C}$ ? $\left(\mathrm{K}_b\right.$ for water $=$ $0.52 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}$ ).

(ii) State Henry's law and write its any one application.

(a) An organic compound (A) with the molecular formula $\mathrm{C}_9 \mathrm{H}_{10} \mathrm{O}$ forms 2, 4-DNP derivative, reduces Fehling solution and undergoes Cannizzaro reaction. On vigorous oxidation, it gives 1, 2-benzene dicarboxylic acid.

(i) Identify the compound (A) and write its IUPAC name.

(ii) Write the reaction of compound (A) with

(1) 2,4-Dinitrophenyl hydrazine and

(2) Fehling solution

(iii) Write the equation of compound (A) when it undergoes Cannizzaro reaction.

OR

(b) (i) Account for the following:

(1) The alpha ( $\alpha$ )-hydrogens of aldehydes and ketones are acidic in nature.

(2) Oxidation of aldehydes is easier than ketones.

(ii) Arrange the following in :

(1) Decreasing reactivity towards nucleophilic addition reaction propanal, acetone, benzaldehyde.

(2) Increasing order of boiling point: Propane, Ethanol, Dimethylether, Propanal

(iii) Give simple chemical test to distinguish between Benzoic acid and Benzaldehyde.