Metals and their compounds

121.Which of the following is the best conductor of heat
 
A. alcohol
 
B. Parad
 
C. ether
 
D. Water
 
Option”B” is correct
122.Which element was first produced artificially?
 
A. neptunium
 
B. plutonium
 
C. francium
 
D. technetium
 
Option”B” is correct
123.What is ultimately formed as a result of radioactive electrolysis of uranium?
 
A. radium
 
B. thorium
 
C. polonium
 
D. lead
 
Option”D” is correct
124.Brass gets discolored in air due to continuous presence of
 
A. aluminum phosphide
 
B. hydrogen sulfide
 
C. hydrogen vapor
 
D. aluminum sulfide
 
Option”B” is correct
125.The red color of ruby ​​is due to the presence of
 
A. chromium oxide
 
B. calcium oxide
 
C. iron oxide
 
D. zinc oxide
 
Option”A” is correct
126.Glass is
 
A. supersaturated solid
 
B. Super absorbed liquid
 
C. superheated gas
 
D. Supersaturated liquid
 
Option”B” is correct
127.Which of the following is called Yashad Pushpa
 
A. zinc chloride
 
B. zinc oxide
 
C. zinc nitrate
 
D. zinc bromide
 
Option”B” is correct
128.Which of the following is responsible for making Pyrex glass more durable?
 
A. potassium carbonate
 
B. lead oxide
 
C. borax
 
D. ferric oxide
 
Option”C” is correct
129.What type of glass is used to make glass reinforced plastic
 
A. pyrex glass
 
B. flint glass
 
C. quartz glass
 
D. fiberglass
 
Option”D” is correct
130.Photochromatic glass has the property of having black color due to the presence of
 
A. silver bromide
 
B. silver oxide
 
C. silver nitrate
 
D. silver chloride
 
Option”D” is correct