List of top Chemistry Questions

Which of the following hormones is responsible for preparing the uterus for implantation of a fertilized egg?

Which of the following is an example for fibre?

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 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)

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?

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

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

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?

At temperature $ T $ (K), the equilibrium constant $ K_c $ for the reaction: \[ A_2(g) \rightleftharpoons B_2(g) \] is 99.0. Two moles of $ A_2(g) $ were heated in a 1L closed flask to reach equilibrium. What are the equilibrium concentrations (in $ mol \ L^{-1} $) of $ A_2(g) $ and $ B_2(g) $?

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):

Given below are two statements: I. Cytosine and guanine are formed in equal quantities in DNA hydrolysis.
II. Adenine and uracil are formed in equal quantities in RNA hydrolysis. The correct answer is:

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