Chemistry
Which of the following is a non-periodic change?
- Change of day and night
- Change of seasons
- Landslides
- Full moon and new moon nights
Phy & Chem Changes
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Answer
Landslides
Reason — Changes that are not repeated at regular intervals are called non-periodic changes. They may occur randomly at any time, like landslides.
Change of day and night is a periodic change as this change occurs regularly every 24 hours due to Earth’s rotation. Seasons repeat in a fixed cycle every year due to Earth’s revolution around the Sun. Full moon and new moon nights occur in a regular cycle known as the lunar cycle.
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Related Questions
Burning of a piece of paper into ash is a:
- periodic change
- natural change
- reversible change
- permanent change
Which of the following is a slow change?
- Rusting of iron
- Burning of wood
- Burning of a cracker
- Switching on a fan
Which of the following is a physical change?
- Cooking of food
- Formation of curd
- A glass cut into pieces
- Boiling of eggs
In a chemical change :
- a new substance is formed
- energy is either released or absorbed
- the change is irreversible
- all of the above