Which of the following is rust?
A. Sodium oxide
B. Iron oxide
C. Silver oxide
D. Copper oxide
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A. Sodium oxide
B. Iron oxide
C. Silver oxide
D. Copper oxide
A. Evaporation
B. Boiling
C. Condensation
D. Melting
A. 5m
B. 8m
C. 20m
D. None of these
A. Plane mirror only
B. Concave mirror only
C. Convex mirror only
D. All mirrors irrespective of their shape
A. It is a form of electromagnetic radiation.
B. It travels at the fastest speed in vacuum.
C. It can be polarized.
D. It is made up of tiny particles called photons.
A. Amplifies the sound
B. Muffles the sound
C. Redirects the sound
D. Has no effect on the sound