Classify the following as slow and fast changes: Blinking of eyes.

Blinking of eyes is a fast change as the process does not take a lot of time to happen. It is a physical change.

Classify the following as slow and fast changes: Drying of clothes.

Clothes dry due to the process of evaporation. Wet clothes get some heat and the water in them turns into vapour. It is a slow change.

Classify the following as slow and fast changes: Sneezing

At times when polluted air that has smoke, dust, and pollen, gets past the hair in the nasal cavity and irritates the lining of the cavity. As a result, we sneeze. Sneezing expels these foreign particles and clean air goes in. It is a fast change.

Classify the following as slow and fast changes: Burning of matchstick.

When a matchstick is rubbed against a suitable surface the combustible substances in matchstick starts to burn with the evolution of heat and light energy. It is a fast exothermic change.

Classify the following as slow and fast changes: Germination of seed.

Germination is a process in which a seed converts into a plant. It is a chemical change and very slow process. It takes a few days to months to develop a seedling from a seed.

E M B I B E

Lakhmir Singh's Science Chemistry>Chapter 2 - Physical and Chemical Changes>EXERCISES

EXERCISES

Author:Lakhmir Singh & Manjit Kaur

Lakhmir Singh Chemistry Solutions for EXERCISES

Simple step-by-step solutions to EXERCISES questions of Physical and Chemical Changes from Lakhmir Singh's Science Chemistry. Also get 3D topic explainers, cheat sheets, and unlimited doubts solving on EMBIBE.