List of top Chemistry Questions

In the reaction \( 2A + B \rightarrow C \), if the rate law is \( \text{Rate} = k[A]^2[B] \), what is the overall order of the reaction?

Which of the following compounds exhibits ionic bonding?

In an oxidation-reduction reaction, what happens to the oxidation state of the central atom in \( \text{MnO}_4^- \) when it is reduced to \( \text{Mn}^{2+} \)?

In the reaction \( 2\text{H}_2\text{O}_2 \rightarrow 2\text{H}_2\text{O} + \text{O}_2 \), what is the role of potassium iodide (KI) in this reaction?

What is the hybridization of the central atom in the molecule \( \text{SO}_3 \)?

Which of the following is the correct order of acidic strength for the following compounds: HNO\(_3\), HClO\(_4\), and HClO\(_3\)?

Compare boiling point of given solutions:
(i) \( 10^{-4} \) NaCl
(ii) \( 10^{-3} \) NaCl
(iii) \( 10^{-2} \) NaCl
(iv) \( 10^{-4} \) urea

Find the dimensions of \( \frac{B}{\mu_0} \)

For \([ \text{NiCl}_4 ]^{2-}\), what is the charge on the metal and shape of the complex respectively?

1.0 g of H₂ has the same number of molecules as in:

According to Fajan's rules, which of the following is not correct about covalent character?

Match List-I with the List-II

List-I (Precipitating reagent and conditions)	List-II (Cation)
(A) \(NH_4Cl + NH_4OH\)	(I) Mn²⁺
(B) \(NH_4OH + Na_2CO_3\)	(II) Pb²⁺
(C) \(NH_4OH + NH_4Cl + H_2S gas\)	(III) Al³⁺
(D) dilute HCl	(IV) Sr²⁺

Choose the correct answer from the options given below:

Write the reaction involved in:
(a) Reimer-Tiemann reaction
(b) Kolbe's reaction

Which isomer of C₄H₉Cl has the lowest boiling point?

For the reaction X + 2Y → P, the differential form equation of the rate law is:

The amount of glucose required to prepare 250 mL of \( \frac{M}{20} \) aqueous solution is:
(Molar mass of glucose: 180 g mol^-1)

The standard electrode potential for Ni²⁺/Ni couple is -0.25 V and for Ag⁺/Ag couple is 0.80 V. These two couples are connected to make an electrochemical cell. The redox reaction is spontaneous. The cell potential will be:

Molality of an aqueous solution of urea is 4.44 m. Mole fraction of urea in solution is x × 10^–3. Value of x is _______. (integer answer)

Write the reaction of glucose with:
(a) HI
(b) Br₂ water

If 5 moles of an ideal gas expands from \( 10 \, L \) to a volume of \( 100 \, L \) at \( 300 \, K \) under isothermal and reversible conditions, then work, \( w \), is \( -x \, J \). The value of \( x \) is ______.
(Given \( R = 8.314 \, \text{J K}^{-1} \text{mol}^{-1} \))

Which of the following ligands has two donor atoms?

Identify the major product C formed in the following reaction sequence:

Which enzyme converts glucose and fructose both into ethanol?

Lowest oxidation number of an atom in a compound \( A_2B \) is -2. The number of electrons in its valence shell is:

An ideal gas, \(\overline{C_V} = \frac{5}{2} R\), is expanded adiabatically against a constant pressure of 1 atm until it doubles in volume.
If the initial temperature and pressure are \(298 \, \text{K}\) and \(5 \, \text{atm}\), respectively, then the final temperature is ______ \( \, \text{K} \) (nearest integer).
Given: \(\overline{C_V}\) is the molar heat capacity at constant volume.