List of top Chemistry Questions

The correct order of oxidizing power of the given ions is Given: $ E^{\circ}_{\text{Mg}^{2+}/\text{Mg}} = -2.36 \, \text{V} $ and $ E^{\circ}_{\text{Cl}_2/\text{Cl}^-} = +1.36 \, \text{V}$

Which of the following is an example for fibre?

Observe the following reaction: $ 2A_2(g) + B_2(g) \xrightarrow{T(K)} 2A_2B(g) + 600 \text{ kJ} $. The standard enthalpy of formation $ (\Delta_f H^\circ) $ of $ A_2B(g) $ is:

The bicarbonate of which alkali metal does not exist as a solid?

Observe the following amino acids:

Which of the following sequence of reagents converts 3-hexene to propane?

Consider the following statements:
Statement I: The entropy of pure crystalline solid approaches zero as the temperature approaches absolute zero value.
Statement II: For a reaction at equilibrium, $\Delta G$ is zero.

The number of ions present in tris(ethane-1,2-diamine)cobalt(III) sulphate is:

Tropolone is an example for which of the following class of compounds?

The density of nitric acid solution is 1.5 g mL$^{-1}$. Its weight percentage is 68. What is the approximate concentration (in mol L$^{-1}$) of nitric acid? (N = 14 u; O = 16 u; H = 1 u)

Which of the following solutions is used in the styptic action which prevents bleeding of blood?

The number of $ d $ electrons in Fe is equal to which of the following?
(i) Total number of $ s $-electrons of Mg
(ii) Total number of $ p $-electrons of Cl
(iii) Total number of $ p $-electrons of Ne

What is the enthalpy change (in J) for converting 9 g of H$_2$O (l) at $ +10^\circ C $ to H$_2$O (l) at $ +20^\circ C $? Given $ C_p $ of water = 75 J/mol K and density of water = 1 g/mL.

The correct order of bond angles of the molecules $ SiCl_4 $, $ SO_3 $, $ NH_3 $, $ HgCl_2 $ is:

The $\Delta T_b$ value for 0.01 m KCl solution is 0.01 K. What is the Van’t Hoff factor? (Kb for water = 0.52 K kg mol$^{-1}$)

Identify the correct equation relating $ \Delta H $, $ \Delta U $, and $ \Delta T $ for 1 mole of an ideal gas (R = gas constant):

The rms velocity ($ u_{\text{rms}} $), mean velocity ($ u_{\text{av}} $), and most probable velocity ($ u_{\text{mp}} $) of a gas differ from each other at a given temperature. Which of the following ratios regarding them is correct?

Match the complexes in list-I with their hybridization in list-II.