Science (English Medium) Class 11 - CBSE Question Bank Solutions

In Ostwald’s process for the manufacture of nitric acid, the first step involves the oxidation of ammonia gas by oxygen gas to give nitric oxide gas and steam. What is the maximum weight of nitric oxide that can be obtained starting only with 10.00 g. of ammonia and 20.00 g of oxygen?

What do you understand by electron-deficient? Provide justification with a suitable example.

What do you understand by electron-precise? Provide justification with a suitable example.

Consider the reaction:

\[\ce{6 CO2(g) + 6H2O(l) → C6 H12O6(aq) + 6O2(g)}\]

Why it is more appropriate to write these reaction as:

\[\ce{6CO2(g) + 12H2O(l) → C6 H12O6(aq) + 6H2O(l) + 6O2(g)}\]

Also, suggest a technique to investigate the path of the redox reactions.

Rationalise the given statement and give a chemical reaction:

Lead (IV) chloride is highly unstable towards heat.

Rationalise the given statement and give a chemical reaction:

Lead is known not to form an iodide, PbI₄.

Classify the following oxide as neutral, acidic, basic or amphoteric:

CO

Classify the following oxide as neutral, acidic, basic or amphoteric:

B₂O₃

Classify the following oxide as neutral, acidic, basic or amphoteric:

SiO₂

Classify the following oxide as neutral, acidic, basic or amphoteric:

CO₂

Classify the following oxide as neutral, acidic, basic or amphoteric:

Al₂O₃

Classify the following oxide as neutral, acidic, basic or amphoteric:

PbO₂

Classify the following oxide as neutral, acidic, basic or amphoteric:

Tl₂O₃

Write suitable chemical equations to show the nature of the following oxide.

B₂O₃

Write suitable chemical equations to show the nature of the following oxide.

SiO₂

Write suitable chemical equations to show the nature of the following oxide.

CO₂

Write suitable chemical equations to show the nature of the following oxide.

Al₂O₃

Write suitable chemical equations to show the nature of the following oxide.

PbO₂

Name the energy which arises due to motion of atoms or molecules in a body. How is this energy affected when the temperature is increased?