RRB GROUP D Chemistry Quiz - 49

Attempt now to get your rank among 3 students!

Question 1:

Which of the following is not effected by Acid rain?

Question 2:

Carbon monoxide is poisonous or toxic in nature because

Question 3:

Which of the following was discovered first in the chromospheres of the sun?

Question 4:

In water, the proportion of oxygen and hydrogen by mass is :

Question 5:

Which one of the following is not a radioactive element?