Refraction of sound can occur in:
Refraction of sound can occur in:
A. Water
B. Air
C. Both A & B
D. None of these
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The season changes because of the ____________?
The season changes because of the ____________?
A. Moon is revolving round the earth
B. Earth is revolving round its axis
C. Earth is revolving round the sun
D. Planet Mars is attracting the sunThe luster of diamond is due to_________?
The luster of diamond is due to_________?A. Reflection
B. Total internal reflection
C. Refraction
D. None of theseThe most important function of perspiration is?
The most important function of perspiration is?A. Get rid of body waste
B. Regulate body temperature
C. Regulate body waste
D. Lubricate the skinRetinol is the chemical name of?
Retinol is the chemical name of?A. Vitamin A
B. Vitamin B
C. Vitamin C
D. Vitamin KWhat is the Chemical formula of Zinc Hydroxide _________ ?
What is the Chemical formula of Zinc Hydroxide _________ ?A. Zn(OH)2
B. ZNO2
C. Zn2(OH)3
D. ZnOHA device that converts mechanical energy into electric energy is called_______?
A device that converts mechanical energy into electric energy is called_______?A. Motor.
B. Transformer.
C. Coil.
D. Generator.