📚NCERT Questions
1,675 solved questions with detailed explanations
What is the first step in balancing a redox reaction using the oxidation number method?
What is the main limitation of the Arrhenius concept of acids and bases?
What happens when Plaster of Paris is mixed with water?
The conversion of ethanol (CH3CH2OH) to ethanoic acid (CH3COOH) is an example of an oxidation reaction. What role does alkaline KMnO4 play in this reaction?
On the pH scale, values from 7 to 14 represent an increase in:
In the Born-Haber cycle for NaCl, which step corresponds to the electron gain enthalpy (Δ_eg H°)?
If you have 1 M NaOH solution and want to prepare 0.2 M solution, how much volume of 1 M NaOH solution would you take to make 1 L of 0.2 M solution?
When balancing a redox reaction in an acidic solution using the oxidation number method, how are the ionic charges balanced?
What is the freezing point of water on the Celsius scale?
An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is likely to be: