Which of the following objects are chiral?

• a.

  Soda can

• b.

  Screwdriver

• c.

  Screw

• d.

  Shoe

a. Soda can:

In order to find the chirality of the given example, check if the mirror images are not superimposable. For achiral objects, the mirror images are superimposable. Also, objects having a plane of symmetry are achiral.

In the case of soda can, the mirror images are superimposable, and it has a plane of symmetry. Therefore, it is achiral.

b. Screw driver:

In the case of screw driver, the mirror images are superimposable, and it has a plane of symmetry. Therefore, it is achiral.

c. Screw:

In the case of screw, the mirror images are not superimposable. It does have a plane of symmetry. A screw has a thread which twists in one direction (right), also the thread twists in another direction (left). Therefore, it is chiral.

d. Shoe:

In the case of shoe, the mirror images are not superimposable. It does not have a plane of symmetry. Therefore, it is chiral.

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