Which of the following reactions are involved in preparation of aldehydes?
(A) Gatterman-Koch reaction
(B) Etard Reaction
(C) Stephen Reaction
(D) Rosenmund Reaction
Choose the correct answer from the options given below:

Read the passage carefully and answer the questions
Sodium dichromate \(Na _2 Cr _2 O _7\) and Potassium dichromate \(K _2 Cr _2 O _7\) are strong oxidizing agents; in acidic solution, its oxidising action can be represented as follows :
\(Cr _2 O _7^{2-}+14 H ^{+}+6 e^{-} \rightarrow 2 Cr ^{3+}+7 H _2 O \left( E ^{\circ}=1.33 V\right)\)
The chromates and dichromates are interconvertible in aqueous solution depending upon pH of the solution.
The chromate ion is tetrahedral whereas the dichromate ion consists of two tetrahedra sharing one corner with \(Cr - O - Cr\) bond angle of \(126^{\circ}\)
Potassium permanganate is prepared by fusion of \(MnO _2\) with an alkali metal hydroxide and an oxidising agent like \(KNO _3\).
This produces the dark green \(K _2 MnO _4\) which disproportionates in a neutral or acidic solution to give permanganate. It is a strong oxidizing agent. Hydrogen ion concentration of the solution plays
an important part in the reduction of permanganate to manganate, manganese dioxide and manganese(II) salt.
Potassium permanganate forms dark purple (almost black) crystals which are isostructural with those of \(KClO _4\).
The salt is not very soluble in water \((6.4 g / 100 g\) of water at 293 K ), but when heated it decomposes at 513 K .
Choose the correct statement from the options given below :

Vapour pressures of pure liquids A and D at \(50^{\circ} C\) are 500 mmHg and 800 mmHg respectively.
The binary solution of A and D boils at \(50^{\circ} C\) and 700 mmHg pressure.
The mole percentage of \(D\) in the solution is:

The \(\alpha\) and \(\beta\) forms of glucose are known as

Read the passage carefully and answer the questions The resistance ( \(R\) ) of an object is given by the expression \(R=\rho \frac{l}{A}\).
The inverse of \(R\) is called conductance and the inverse of \(\rho\) is called conductivity or specific conductance represented by \(\kappa\).
The conductivity depends upon the nature of the material (insulator, semiconductor or conductor) and the temperature of the substance.
Similarly, the conductance due to the ions present in the solution (ionic conductance) depends upon the nature of the electrolyte, size of ions, the nature of the solvent and the temperature.
Molar conductivity ( \(\Lambda_m\) ) of a solution at a given concentration is the conductance of volume \(V\) containing one mole of electrolyte kept between two electrodes of area \(A\) and unit distance apart. It is given by the expression \(\Lambda_m=\kappa V .\)
Molar conductivity increases with decrease in concentration and when concentration approaches zero, it is called limiting molar conductivity.
The decrease is linear for a strong electrolyte. However, for a weak electrolyte the change is gradual at higher concentrations and sharp near zero concentration.
Using limiting molar conductivity values of strong electrolytes we can calculate the limiting molar conductivity of weak electrolytes using Kohlrausch law of independent migration of ions.
From molar conductivity and limiting molar conductivity we can determine the degree of dissociation \(\left(\frac{\Lambda_m}{\Lambda_m^0}\right)\) and the ionization constant of a weak acid.
For a weak acid like acetic acid, the correct expression for the ionisation constant at concentration \(c\) is

Match List-l with List-ll

List-l	List-II
(A) Fermentation of glucose	(I) Invertase
(B) Methanol	(II) Zymase
(C) Ethanol	(III) Poisonous even in small amounts
(D) Fermentation of sucrose	(IV) Solvent in paint industry

Choose the correct answer from the options given below:

In the electrophilic substitution reactions of aniline, the \(- NH _2\) group acts

Which of the following statements are correct for dilute solutions?
(A) The elevation in boiling point is directly proportional to the molality of the solution.
(B) The elevation in boiling point is inversely proportional to the molality of the solution.
(C) The depression in freezing point is directly proportional to the molality of the solution.
(D) The depression in freezing point is inversely proportional to the molality of the solution.
Choose the correct answer from the options given below:

Let a relation \(R=\{(a, b): a\) is a factor of \(b, a, b \in N\}\). Then, \(R\) is __________.

An ammeter of resistance 5 \( \Omega \) reads up to 1 A. The value of the shunt required to increase its range to 5 A will be

If the maximum value of the function \(f(x)=\frac{2 \log _e x}{x}, x>0\) occurs at \(x=e\), then \(e^3 f^{\prime \prime}(e)\) is equal to

The transfer of the ovum from a donor to the fallopian tube of another female is known as:

In a 500 m race, the ratio of speeds of two participants \(A\) and \(B\) is \(4: 5\).
If \(A\) has a start of 180 m , then the distance by which \(A\) wins is :