Elements And Metals : 2

Question 11 :

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


A). Krypton
B). Xenon
C). Neon
D). Helium
Answer : Option D

Question 12 :

Which of the following is in liquid form at room temperature?


A). Lithium
B). Sodium
C). Francium
D). Cerium
Answer : Option C

Question 13 :

Sodium metal is kept under


A). petrol
B). alcohol
C). water
D). kerosene
Answer : Option D

Question 14 :

Which of the following are the ingredients of gun metal?


A). Iron, Zinc, Titanium
B). Iron, tin
C). Iron, Brass, Tin
D). Copper, Tin
Answer : Option D

Question 15 :

From which mineral is radium obtained?


A). Rutile
B). Haematite
C). Limestone
D). Pitchblende
Answer : Option D