For a substance at a given temperature, the osmotic pressure of its concentrated solution:

The increasing order of stability is :
(A) \(\left[ Cu \left( NH _3\right)_4\right]^{2+}\)
(B) \(\left[ Cu \left( CN _4\right]^{2-}\right.\)
(C) \(\left[ Cu (e n)_2\right]^{2+}\)
(D) \(\left[ Cu \left( H _2 O \right)_4\right]^{2+}\)
Choose the correct answer from the options given below :

For a chemical reaction with a rise in temperature by \(10^{\circ} C\), the rate constant becomes nearly

\(Zn (s) \rightarrow Zn^{2+} + 2e^-\text{}\)
Above reaction at anode is found in:

Calculate the emf of the following cell at 298 K if \(E_{\text {Cell }}^{\circ}=1.10 \mathrm{~V}:\)
\(\mathrm{Ni}(\mathrm{s})+2 \mathrm{Ag}^{+}(0.2 \mathrm{M}) \rightarrow \mathrm{Ni}^{2+}(0.04 \mathrm{M})+2 \mathrm{Ag}(\mathrm{s})\)

Which sodium halide is employed in Finkelstein reaction?

Werner was the first to describe the bonding features in coordination compounds. But his theory could not answer basic questions like :
(i) Why only certain elements possess the remarkable property of forming coordination compounds ?
(ii) Why the bonds in coordination compounds have directional properties ?
(iii) Why coordination compounds have characteristics magnetic and optical properties ?Many approaches have been put forth to explain the nature of bonding in coordination compounds viz. Valence Bond Theory (VBT), Crystal Field Theory (CFT), Ligand Field Theory (LFT) and Molecular Orbital Theory (MOT).
We shall focus our attention on elementary treatment of the application of VBT and CFT to coordination compounds.
According to this theory, the metal atom or ion under the influence of ligands can use its ( \(n -1\) )d, ns np or ns, np, nd orbitals for hybridisation to yield a set of equivalent orbitals of definite geometry such as octahedral, tetrahedral, square planar and so on.
These hybridised orbitals are allowed to overlap with ligand orbitals that can donate electron pairs for bonding.
Predict the shape of \(\left[ Ni ( CO )_4\right]\) on the basis of VBT :

An unpolarised beam of light of intensity \(I_0\) falls on a single polaroid. The intensity of the emergent beam is

Which of the following are correct about equated monthly installments (EMI)?
(A) The EMI depends on principal borrowed, rate of interest and tenure of the loan.
(B) It is a fixed amount made by borrower to the lender every month.
(C) The interest remains constant for every EMI in reducing balance method.
(D) As we pay off our loan, the outstanding principal amount decreases with every EMI in reducing balance method.
Choose the correct answer from the options given below :

Consider \(Z = x + y\) subject to the constraints \(2x + y \le 3, 2x - y \ge 0, x \ge 0, y \ge 0\). The maximum value of Z is:

An infinite line charge produces an electric field of \( 9 \times 10^6 \text{ N/C} \) at a distance of \( 20 \text{ cm} \). The linear charge density will be :

For the given five values, \(16,25,19,34,43\), the three year moving averages are

In a coil, the current is changed from 12 A to 24 A in 1 s. The self-induced emf of the coil is 24 V. The change in energy in the coil is