Question Detail

CHM 102 Sblock elements Objective Question
Take CBT

Question

How does lithium nitrate (LiNO₃) decompose upon heating compared to other Group 1 nitrates like KNO₃?
Options
A LiNO₃ decomposes into lithium nitrite and oxygen, similar to KNO₃.
B LiNO₃ decomposes into lithium oxide, nitrogen dioxide, and oxygen, while KNO₃ forms nitrite and oxygen.
Correct Answer
C Both LiNO₃ and KNO₃ decompose into their respective metal oxides and nitrogen gas.
D LiNO₃ is thermally stable and does not decompose upon heating.
Correct Answer

Option B is the correct answer.

Detailed Explanation

Page 22 states: 'When heated, nitrates of group 1 elements are converted to nitrite and oxygen is given off' with the example 2KNO₃(s) → 2KNO₂(s) + O₂(g). However, it then specifies: 'However, lithium nitrate (LiNO₃) decomposes to the corresponding oxide, Nitrogen dioxide (NO₂) and Oxygen (O₂) gases are also given off,' providing the equation 4LiNO₃(s) → 2Li₂O(s) + 4NO₂(g) + O₂(g).

Hint

Differentiate the decomposition products of lithium nitrate from other Group 1 nitrates on page 22.

Question Info

Course: CHM 102
Topic: Sblock elements
Type: Objective
Difficulty: Not specified
Question 1803 of 1999
Previous Course Details Next