Science Quiz 18

1. Thorium is far more abundant in nature than uranium. 
2. On the basis of per unit mass of mined mineral, thorium can generate more energy compared to natural uranium. 
3. Thorium produces less harmful waste in comparison to uranium. 

Which of the statements given above is/are Correct?

(1) To produce light, a CFL uses mercury vapour and phosphor while an LED lamp uses semi-conductor material. 

(2) The average life span of a CFL is much longer than that of an LED lamp. 

(3) A CFL is less energy-efficient as compared to an LED lamp. 

Which of the statements given above is/are correct?

1. DVD supports standard definition video while BD supports high definition video. 
2. Compared to a DVD, the BD format has several times more storage capacity. 
3. Thickness of BD is 2.4 mm while that of DVD is 1.2 mm. 

Which of the statements given above is/are correct?

1. Neutrinos are chargeless elementary particles that travel close to the speed of light. 
2. Neutrinos are created in nuclear reactions of beta decay. 
3. Neutrinos have a negligible, but non zero mass. 
4. Trillions of Neutrinos pass through human body every second. 

Which of the statements given above is/are correct?