X-rays were discovered by __________ | MCQs

1. X-rays were discovered by __________.

A. Rontgen

B. Thomson
C. Rutherford
D. Bacquerel

2. The speed of light is __________.

A. 280,000 km/s

B. 300,000 km/s

C. 320,000 km/s
D. none of these

3. During winter in cold countries, the __________ is mixed to melt the ice on the icy roads.

A. Salt

B. Chlorine
C. Carbon dioxide
D. Water