Molecules in solids are held together by dipole - dipole interactions. Identify the polar molecules from the following.
A. Solid \(SO_2\)
B. \(NH_3\)
C. \(Cl_2\)
D. \(HCl\)
E. \(He\)
Choose the correct answer from the options given below:

"Choose the reactions given by \(\text{Cr}_2\text{O}_7^{2-}\)
(A)\(\text{Cr}_2\text{O}_7^{2-} + 14\text{H}^+ + 6\text{Fe}^{2+} \rightarrow 2\text{Cr}^{3+} + 6\text{Fe}^{3+} + 7\text{H}_2\text{O}\)
(B) \(\text{Cr}_2\text{O}_7^{2-} + 14\text{H}^+ + 3\text{H}_2\text{S} \rightarrow 2\text{Cr}^{3+} + 3\text{SO}_4^{2-} + 7\text{H}_2\text{O}\)
(C) \(\text{Cr}_2\text{O}_7^{2-} + 14\text{H}^+ + 3\text{Sn}^{2+} \rightarrow 2\text{Cr}^{3+} + 3\text{Sn}^{4+} + 7\text{H}_2\text{O}\)
(D) \(\text{Cr}_2\text{O}_7^{2-} + 14\text{H}^+ \rightarrow 3\text{Cr}^{3+} + 2\text{H}_2\text{O}\)
(E) \(\text{Cr}_2\text{O}_7^{2-} + 2\text{OH}^- \rightarrow 2\text{CrO}_4^{2-} + \text{H}_2\text{O}\)
Choose the correct answer from the options given below:"

Match List-l with List-II

List-l (Test)	List-II (Identification)
(A) Hinsberg's Test	(I) Primary, Secondary and tertiary Amines
(B) Isocyanide test	(II) Aliphatic and Aromatic primary amines
(C) Azo dye test	(III) Primary Aromatic amines
(D) Tollen's Test	(IV) Reducing sugars

Choose the correct answer from the options given below:

"Answer the question on basis of passage given below:
\(G = \frac{\kappa A}{l}\) = k (both \(A\) and \(l\) are unity in their appropriate units in m or cm)
Molar conductivity of a solution at a given concentration is the conductance of the volume \(V\) of solution containing one mole of electrolyte kept between two electrodes with area of cross section \(A\) and distance of unit length (\(l\)). Therefore,
\(\Lambda_m = \frac{\kappa A}{l}\)
Since \(l = 1\) and \(A = V\) (volume containing 1 mole of electrolyte),
\(\Lambda_m = \kappa V\)
What does \(\kappa\) represent in the paragraph?"

Gabriel phthalimide synthesis is used for the preparation of

Among the following, which is the correct set of reducing agents for conversion of nitrobenzene into aniline?
(A) \(H _2 / Pd\)
(B) \(Sn + HCl\)
(C) \(Fe + HCl\)
(D) \(NaBH _4\)
Choose the correct answer from the options given below:

Acidified potassium dichromate oxidizes sulphides (S^2-) to __________

The gas evolved when methylamine reacts with nitrous acid is

A furniture trader deals in only two items - chairs and tables.
He has Rs. 50, 000 to invest and a space to store at most 35 items.
A chair costs Rs. 1000 and a table costs Rs. 2000.
The trader earns a profit of Rs. 150 on a chair and Rs. 250 on a table.
Choose the correct option that describes the given linear programming problem (LPP) to maximize the profit, where \(x\) and \(y\) are the number of chairs and tables.

Match List-I with List-II:

List-I (AC Circuit)	List-II (Phase Angle)
(A) Phase Difference between current and voltage in a pure inductive ac circuit	(I) zero
(B) Phase Difference between current and voltage in a pure resistive ac circuit	(II) \(\pi/2\), current lags voltage
(C) Phase Difference between current and voltage in a pure capacitive ac circuit	(III) \(\tan^{-1}(\frac{X_L - X_C}{R})\)
(D) Phase Difference between current and voltage in a series LCR circuit	(IV) \(\pi/2\), current leads voltage

Choose the correct answer from the options given below

Which of the following statements is correct for the galvanic cell?

The energy of a photon of wavelength (\( \lambda \)) is given by the expression: (Symbols have their usual meaning: h = Planck's constant, c = speed of light)

Which of the following statements about gold (Au) element are correct ?
(A) quad Gold occurs in nature in native state.
(B) quad Gold discolves in aqua-regia.
(C) quad Gold is extracted by leaching the metal with dilute NaCN .
(D) \quad Leaching is followed by replacement reaction.
Choose the correct answer from the options given below :