Tag: substances and objects

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Multiple choice chemistry changes around us can all changes be reversed? substances and objects classification of changes

In the tools which are used to dig the soil, the iron blade in these tools fixed to the wooden handle. Which of the following is used during the change?

  1. Expansion

  2. Contraction

  3. Both expansion and contraction.

  4. Neither expansion and contraction.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Both expansion and contraction is used during the change.
The iron blade has a ring in which the wooden handle is fixed. The ring is slightly smaller in size than the wooden handle.The ring is heated and it becomes slightly larger in size (expands). The handle  fits into the ring. When the ring cools it contracts and tightly fits on the handle.

Multiple choice chemistry changes around us can all changes be reversed? substances and objects classification of changes

The iron blade has a ring in which the wooden handle is fixed. The ring is slightly smaller in size than the wooden handle.
The ring is heated . When the ring cools it _____ and tightly fits on the handle.

  1. contracts

  2. expands

  3. evaporates

  4. condenses
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The iron blade has a ring in which the wooden handle is fixed. The ring is slightly smaller in size than the wooden handle.
The ring is heated and it becomes slightly larger in size (expands). The handle  fits into the ring. When the ring cools it contracts and tightly fits on the handle.