List of top Chemistry Questions

What is the equivalent weight of sulphuric acid (H2SO4) in a reaction where it donates 2 H+ ions?
A gas occupies 2 liters at a pressure of 3 atm. What will be its volume when the pressure is reduced to 1.5 atm at constant temperature?
What is the standard electrode potential of the half-reaction: \[ \text{Cu}^{2+} + 2e^- \rightarrow \text{Cu} \, (\text{solid})? \] Given that the standard electrode potential for the half-reaction: \[ \text{Ag}^+ + e^- \rightarrow \text{Ag} \, (\text{solid}) \quad \text{is} \, +0.80 \, \text{V}. \] Also, the cell potential for the following reaction is: \[ \text{Cu}^{2+} + 2\text{Ag} \rightarrow \text{Cu} + 2\text{Ag}^+ \] is \( 0.46 \, \text{V} \).
How many grams of $ \mathrm{Al_2(SO_4)_3} $ are required to produce 10 L of a 0.5 M solution? (Molar mass = 342 g/mol)

Consider the following sequence of reactions :

Molar mass of the product formed (A) is ______ g mol\(^{-1}\).

Which of the following has the lowest boiling point?

0.01 mole of an organic compound (X) containing 10% hydrogen, on complete combustion, produced 0.9 g H₂O. Molar mass of (X) is ___________g mol\(^{-1}\).

The number of moles of CO$_2$ produced when 2 moles of C$_2$H$_6$ are completely burnt is:
Which of the following graph correctly represents the plots of \(K_H\) at 1 bar gases in water versus temperature?
A gas undergoes an isothermal process at 300 K, and its volume increases from 2 L to 4 L. If the initial pressure is 2 atm, what is the work done by the gas? (R = 8.314 J/mol·K, assume 1 mole)

Which of the following amino compound(s) CANNOT be prepared by Gabriel phthalimide synthesis? 

(A) n-Butylamine 
(B) Alanine 
(C) Aniline 
(D) t-Butylamine 
Choose the correct answer from the options given below:

For a two-component system, the degree of freedom is given by:
What is the pH of a 0.01 M solution of HCl?
What is the pH of a 0.1 M NaOH solution?
Which of the following gases is produced when zinc reacts with dilute hydrochloric acid?
In the reaction \( 2 \, \text{H}_2 + \text{O}_2 \to 2 \, \text{H}_2\text{O} \), if 4 moles of hydrogen react completely with oxygen, how many moles of water will be produced?
The IUPAC name of the coordination compound is: \[ [\text{Rh}(CO)_2I_2]^- \]

The observed and normal molar masses of compound MX2 are 65.6 and 164 respectively. The percent degree of ionisation of MX2 is ________________% (Nearest integer).
 

Why are haloarenes less reactive towards nucleophilic substitution reactions? How does the presence of nitro (–NO₂) group at ortho- and para-positions in haloarenes increase the reactivity towards nucleophilic substitution reactions?
Complete each synthesis by giving missing starting material, reagent, or products:
synthesis by giving missing starting material, reagent
Draw the structure of the major monohalo product for each of the following reactions:
major monohalo product
Observe the graph in the given figure and answer the following questions:
linear relationship between log |R0| and time.

(a) Predict the order of reaction.
(b) What is the slope of the curve?
PCl$_3$, 2KCl does not give precipitate of AgCl with AgNO$_3$ solution. Write the structural formula and IUPAC name of the complex.
For the reaction:
2H$_2$O$_2$ $\xrightarrow{I^-}$ 2H$_2$O + O$_2$
Given mechanism:
(I) H$_2$O$_2$ + I$^-$ → H$_2$O + IO$^-$ (slow)
(II) H$_2$O$_2$ + IO$^-$ → H$_2$O + I$^-$ + O$_2$ (fast)
(1) Write rate law for the reaction.
(2) Write the overall order and molecularity of the reaction.

Name the type of isomerism exhibited by the following compounds. Also, draw their corresponding isomers.

(I) \( [\text{Co(NH}_3\text{)}_6][\text{Cr(CN)}_6] \)

(II) \( [\text{Co(en)}_3]^{3+} \)

(III) \( [\text{Co(NH}_3\text{)}_3(\text{NO}_2)_3] \)