The following are the half lives of four active isotopes. Which one of the following is the most dangerous to handle?
3 billion years
100 years
0.01 minute
13 days
Additional Questions
|
The gas used for artificial ripening of green fruit is |
Answer |
|
Zone refining is used for the purification of |
Answer |
|
The main chemical constituent of the oil of cardamom which is responsible for flavour of this oil is |
Answer |
|
The molecule which has the highest percentage of ionic character among the following is |
Answer |
|
The high reactivity of fluorine is due to |
Answer |
|
The iron ore magnetite consists of |
Answer |
|
The ionisation energy of hydrogen atom in the ground state is x KJ. The energy required for an electron to jump from 2nd orbit to 3rd orbit is |
Answer |
|
The major constituent of air is |
Answer |
|
The main chemical constituent of clay is |
Answer |
|
The mineral containing both magnesium and calcium is |
Answer |