Average \(\mathrm{C}-\mathrm{H}\) bond energy is \(416 \mathrm{~kJ} \mathrm{~mol}^{-1}\). Which of the following is correct?

Consider the following reaction
\(\mathrm{A}(\mathrm{~g})+3 \mathrm{~B}(\mathrm{~g}) \longrightarrow 2 \mathrm{C}(\mathrm{~g}) ; \Delta \mathrm{H}^{\ominus}=-24 \mathrm{~kJ} .\)
At \(25^{\circ} \mathrm{C}\) if \(\Delta \mathrm{G}^{\ominus}\) of the reaction is -9 kJ, the standard entropy change (in \(\mathrm{JK}^{-1}\) ) of the same reaction at same temperature is

At \(\mathrm{T}(\mathrm{K}), \mathrm{K}_{\mathrm{c}}\) value of \(\mathrm{AO}_2(\mathrm{~g})+\mathrm{BO}_2(\mathrm{~g}) \rightleftharpoons \mathrm{AO}_3(\mathrm{~g})+\mathrm{BO}(\mathrm{g})\) is 16. In a closed 1 L flask, one mole each of \(\mathrm{AO}_2, \mathrm{BO}_2, \mathrm{AO}_3\) and BO are taken and heated to \(\mathrm{T}(\mathrm{K})\). Identify the correct statements about this equilibrium.
I) Total number of moles at equilibrium is 4
II) At equilibrium, the ratio of moles of \(\mathrm{AO}_2\) and \(\mathrm{AO}_3\) is \(1: 4\)
III) Total number of moles of \(\mathrm{AO}_2\) and \(\mathrm{BO}_2\) at equilibrium is 0.8

Identify the correct statements about the anomalous behaviour of Boron I. Boron trihalides can form dimeric structures. II. Boron shows $+1$ as stable oxidation state III. Maximum covalency of Boron is four. IV. Boron does not form ${\mathrm{BF}}_6^{6-}$ ion.

What is the drug used to control depression and hypertension?

Bond order is an inverse measure of

Which of the following statements are correct for classification of elements?
I. The properties of elements are periodic functions of their atomic numbers.
II. Non-metallic elements are less in number than the metallic elements.
III. The first ionisation energies of elements along a period do not vary in a regular manner.
IV. The ground state electronic configuration of \(\mathrm{Pd}(Z=46)\) is \([\mathrm{Kr}] 4 d^8 5 s^2\).

A particle of mass 2 g and charge \(6 \mu \mathrm{C}\) is accelerated from rest through a potential difference of 60 V . The speed acquired by the particle is

If all the letters of the word CRICKET are permuted in all possible ways and the words (with or without meaning) thus formed are arranged in the dictionary order, then the rank of the word CRICKET is

As shown in the figure, a block of mass \(9 \mathrm{~kg}\) is hung by a wire of area of cross-section of 1 \(\mathrm{mm}^2\) in a lift going up with an acceleration of \(2 \mathrm{~ms}^{-2}\). If the speed of the transverse wave on the wire is \(120 \mathrm{~ms}^{-1}\), the density of the material of the wire is
(Acceleration due to gravity \(=10 \mathrm{~ms}^{-2}\))

A balloon of mass \(M\) descends with an acceleration \(a( < g)\). What mass need to be removed from the balloon, so that it starts ascending with acceleration, \(a\) ?

\(\text { In } \triangle \mathrm{ABC}, \frac{r_2\left(r_1+r_3\right)}{\sqrt{r_1 r_2+r_2 r_3+r_3 r_1}}=\)

The role of copper diaphragm in Whytlaw-Gray's method is