The correct option with respect to the Pauling electronegativity values of the elements is

At \(298\, \mathrm{~K}\), the enthalpy of fusion of a solid \((\mathrm{X})\) is \(2.8 \,\mathrm{k} \mathrm{J}\, \mathrm{mol}^{-1}\) and the enthalpy of vaporisation of the liquid \((X)\) is \(98.2 \,\mathrm{~kJ}\, \mathrm{~mol}^{-1}\). The enthalpy of sublimation of the substance \((\mathrm{X})\) in \(\mathrm{kJ} \,\mathrm{mol}^{-1}\) is \(.....\) (in nearest integer)

Which of the vitamins given below is water soluble?

Amongst the following the number of oxide(s) which are paramagnetic in nature is \(Na _{2} O , KO _{2}, NO _{2}, N _{2} O , ClO _{2}, NO , SO _{2}, Cl _{2} O\)

Given below are two statements. Statement \(I:\) In the titration between strong acid and weak base methyl orange is suitable as an indicator. Statement \(II:\) For titration of acetic acid with \(\mathrm{NaOH}\) phenolphthalein is not a suitable indicator. In the light of the above statements, choose the most appropriate answer from the options given below:

In \(CH _{2} = C = C H - C H _{3}\) \(\quad 1\quad \quad 2\quad \quad 3\quad \quad \quad 4\) molecule, the hybridization of carbon \(1,2,3\) and \(4\) respectively are :

The molecular formula of second homologue in the homologous series of mono carboxylic acids is___________.

Two coils require \(20\) minutes and \(60\) minutes respectively to produce same amount of heat energy when connected separately to the same source. If they are connected in parallel arrangement to the same source; the time required to produce same amount of heat by the combination of coils, will be________ \(min\)

Given below are two statements : Statement \(I :\) Stopping potential in photoelectric effect does not depend on the power of the light source. Statement \(II :\) For a given metal, the maximum kinetic energy of the photoelectron depends on the wavelength of the incident light. In the light of above statements, choose the most appropriate answer from the options given below. Options :

The functional group that shows negative resonance effect is _______.

The least acidic compund, among the following is which?

A bar magnet has total length \(2 l=20\) units and the field point \(P\) is at a distance \(\mathrm{d}=10\) units from the centre of the magnet. If the relative uncertainty of length measurement is \(1 \%\), then uncertainty of the magnetic field at point P is :

Which of the following statements are correct, if the threshold frequency of caesium is \(5.16 \times 10^{14} \mathrm{~Hz}\) ?
A. When Cs is placed inside a vacuum chamber with an ammeter connected to it and yellow light is focused on Cs the ammeter shows the presence of current.
B. When the brightness of the yellow light is dimmed, the value of the current in the ammeter is reduced.
C. When a red light is used instead to the yellow light, the current produced is higher with respect to the yellow light.
D. When a blue light is used, the ammeter shows the formation of current.
E. When a white light is used, the ammeter shows formation of current.
Choose the correct answer from the options given below :