+91-8076753736 support@wiredfaculty.com

Sponsor Area

Physical And Chemical Changes

Question

Wired Faculty App

The gas we use in the kitchen is called liquefied petroleum gas (LPG). In the cylinder it exists as a liquid. When it comes out from the cylinder it becomes a gas (Change − A) then it burns (Change − B). The following statements pertain to these changes. Choose the correct one.
(i) Process − A is a chemical change.
(ii) Process − B is a chemical change.
(iii) Both processes A and B are chemical changes.
(iv) None of these processes is a chemical change.

Solution

(ii) Process − B is a chemical change.

Some More Questions From Physical and Chemical Changes Chapter

Explain how painting of an iron gate prevents it from rusting.

Explain why rusting of iron objects is faster in coastal areas than in deserts.

The gas we use in the kitchen is called liquefied petroleum gas (LPG). In the cylinder it exists as a liquid. When it comes out from the cylinder it becomes a gas (Change − A) then it burns (Change − B). The following statements pertain to these changes. Choose the correct one.
(i) Process − A is a chemical change.
(ii) Process − B is a chemical change.
(iii) Both processes A and B are chemical changes.
(iv) None of these processes is a chemical change.

Anaerobic bacteria digest animal waste and produce biogas (Change − A).
The biogas is then burnt as fuel (Change − B). The following statements pertain to these changes. Choose the correct one.

Mock Test Series

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation