By which process copper is refined ____________?
By which process copper is refined ____________?
A. Roasting
B. Oxidation
C. Zone Refining
D. Electrolysis
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Which of the following vitamins promote healthy functioning of eyes in human beings?
Which of the following vitamins promote healthy functioning of eyes in human beings?
A. Vitamin B
B. Vitamin C
C. Vitamin A
D. Vitamin DWhich has highest fuel value?
Which has highest fuel value?A. Charcoal
B. Gasoline
C. Hydrogen
D. None of theseSound of frequency below 20 Hz is:___________?
Sound of frequency below 20 Hz is:___________?A. Audiosonic
B. Infrasonic
C. Ultrasonic
D. SupersonicSounds with frequencies below 20 hertz are called infrasound. Infrasound is too low-pitched for humans to hear. Sounds with frequencies above 20,000 hertz are called ultrasound.
Silicon is an example of _________?
Silicon is an example of _________?A. No-conductor
B. Semiconductor
C. Super Conductor
D. None of theseWhich on of the following planets orbits around the sun in a clockwise direction?
Which on of the following planets orbits around the sun in a clockwise direction?
A. Earth
B. Mercury
C. Jupiter
D. VenusIn which part of the eye lies the pigment that decides the colour of the eyes of a person___?
In which part of the eye lies the pigment that decides the colour of the eyes of a person___?
A. Retina
B. Iris
C. Cornea
D. Pupal