At a certain temperature, the value of the slope of the plot of osmotic pressure (\(\pi\)) against concentration (\(\text{C}\) in mol \(\text{L}^{-1}\)) of a certain polymer solution is 291R.
The temperature at which osmotic pressure is measured is

Which of the following reactions will give n-Propanol as a product?
(A) Hydroboration oxidation of Propene
(B) Reduction of propanal with Palladium as a catalyst
(C) Reaction of Formaldehyde with Ethylmagnesiumbromide followed by hydrolysis
(D) Acid catalyzed hydration of propene
Choose the correct answer from the options given below:

Minimum boiling azeotropes show __________ deviation from Raoult's Law at a specific composition.

Answer the question on basis of passage given below :
Molecular nitrogen is very little reactive chemically. During lightning discharge, atmospheric nitrogen and oxygen combines to form nitric oxide which also combines with oxygen to form nitrogen dioxide. Both NO and \(NO _2\) constitute smog which is very poisonous. It can cause burning sensasion in the eyes and adversely affect respiratory system.
What is the colour of nitrogen dioxide.

Arrange the following ions in increasing order of number of 3d-electrons
(A) Cr²⁺
(B) Cu⁺
(C) Ti³⁺
(D) Mn⁺
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Ultra pure silicon can be obtained by

The rate constant for the first order reaction is \(60\) \(s^{-1}\). The time taken to reduce the initial concentration of the reactant to its \(1/26^{th}\) value is:
[Given \(\log 26 = 1.4150\)]

The electric potential for an electric dipole

Two cylindrical wires of the same material have their lengths in the ratio 2: 1 and their diameters in the ratio \(1: 3\). The ratio of the resistance of thinner wire to that of thicker wire is:

An electromagnetic wave travels in a medium at a speed of \( 2 \times 10^8 \text{ m/s} \). If the relative permeability (\( \mu_r \)) of the medium is 1.0, then the relative permittivity (\( \varepsilon_r \)) of the medium is equal to

Which among the following is not an Analgesic?

Mischmetall consists of a lanthanoid metal (95\(\%\)) and Iron (~5\(\%\)) and traces of S, C, Ca \(\&\) Al. Mischmetall used for producing bullets contains:

Answer the question on the basis of passage given below :
Nitrogen differs from rest of the members of group 15 due to its small size, high electronegativity, high ionization enthalpy and non-availability of d orbitals. Nitrogen has unique ability to form pa - pa multiple bonds with itself and with other elements having small size and high electronegativity. Heavier elements of this group do not form pa - pr bonds as their atomic orbitals are so large and diffuse that they cannot have effective overlapping.
Arrange the following in decreasing order of their basic strength :
A. PH3 \(_3\)
B. \(AsH _3\)
C. \(NH _3\)
D. \(SbH _3\)
E. \(BiH _3\)
Choose the correct answer from the options given below: