DP HEAD CONSTABLE AWO/TPO (GENERAL SCIENCE) QUIZ

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Question 1:

An emulsion is a colloidal solution of-

Question 2:

Which of the following types of light are strongly absorbed by plants?

Question 3:

The sounds having a frequency of 20 Hertz to 20,000 Hertz are known as–

Question 4:

Which is the control centre of a reflex action?

Question 5:

The study of Improvement of human race by improving environment is known as ?