Choose the correct statement:
Three charges \( 2q, -q, -q \) are located at the vertices of an equilateral triangle. At the centroid:

A nucleus with mass number 240 and binding energy per nucleon 7.6 MeV splits into two fragments each of mass number 120 with binding energy per nucleon 8.5 MeV. The amount of energy released in this process will be :

The Mutual inductance \(M _{12}\) of coil 1 with respect to coil 2-

The figure shows a Wheatstone bridge circuit arrangement with a galvanometer G of resistance 5 \( \Omega \) to detect the presence of current. The ratio of heat dissipated across four resistors, \( R_1, R_2, R_3 \) and \( R_4 \) respectively, is :

A light ray is incident normal to one face of a right-angled isosceles prism and is totally internally reflected at the glass-air interface. If the angle of reflection is \(\frac{π}{4}\), what can be concluded about the refractive index?

Resolving power of a telescope can be increased by increasing :

Frequencies in the UHF range normally propagate by means of :

A gaussian surface encloses three point charges \( q_1 = -14 \text{ nC}, q_2 = 78.85 \text{ nC} \) and \( q_3 = -56 \text{ nC} \). The electric flux for the gaussian surface due to these charges is

\(CH_3CH_2COCH_3 \xrightarrow{Y} CH_3CH_2CH_2CH_3\) The reagent Y is:

\(s p^3\) hybridization leads to ______________

Match List - I with List - II.

List - I	List - II
(A) Metals	(I) Elements/compounds
(B) Pure semiconductors	(II) Extrinsic semiconductor
(C) Doped semiconductor	(III) Low resistivity
(D) Semiconductors	(IV) Intrinsic semiconductors

Choose the correct answer from the options given below:

Match List-I with List-II

List-I (Reaction Name)	List-II (Reaction)
(A) Rosenmund Reaction	(I)
(B) Stephen Reaction	(II)
(C) Gattermann Koch Reaction	(III)
(D) Etard Reaction	(IV)

Choose the correct answer from the options given below:

Read the passage carefully and answer the questions:
The degeneracy of the \(d\) orbitals has been removed due to ligand electron-metal electron repulsions in the octahedral comple: to yield three orbitals of lower energy, \(t_{2 g}\) set and two orbitals of higher energy, \(e_g\) set. This splitting of the degenerate levels due to the presence of ligands in a definite geometry is termed as crystal field splitting and the energy separation is denoted by \(\Delta_0\). Thus energy of the two \(e_g\) orbitals will increase by \((3 / 5) \Delta_0\) and that of three \(t_{2 g}\) will decrease by \((2 / 5) \Delta_0\). The crystal field splitting \(\Delta_0\) depends upon the field produced by the ligand and charge on the metal ion. Some ligands are able to produce strong fields, in which case the splitting will be large, whereas others produce weak fields and consequently result in small splitting of \(d\) orbitals. Relative magnitude of crystal field splitting energy \(\Delta_0\) and pairing energy, \(P\) (energy required for electron paring in a single orbital) determine the formation of low spin ( \(\Delta_0>P\) ) or high spin ( \(\Delta_0<P\) ) complex. In tetrahedral coordination entity formation, the \(d\)-orbital splitting is inverted and is smaller as compared to the octahedral field splitting. The crystal field theory attributes the colour of the complex to \(d-d\) transition of the electron. The colour of the coordination compounds depends on the crystal field splitting. In the absence of ligand, crystal field splitting does not occur and hence the substance is colourless.
Which of the following complex is not expected to be coloured?