We know, silicon is a natural semi-conductor, if manufacturer has lost its supplier then they can look for another element which is quite similar to silicon in electronic configuration.
We should go down the group, next element in 14th group is "Germanium" so we can use that for that purpose.
In short, Your Answer would be "Germanium"
Hope this helps!
When the substance is creating gases. Sometimes when it’s bubbling up
The given question is incomplete. The complete question is :
What is the net ionic equation for the following reaction?
Answer : The spectator ions are 
and 
Explanation:
Neutralization is a chemical reaction in which an acid and a base reacts to form salt and water.
Spectator ions are defined as the ions which does not get involved in a chemical equation or they are ions which are found on both the sides of the chemical reaction present in ionic form.
The given chemical equation is:
The ions which are present on both the sides of the equation are barium and chromate ions. and hence are not involved in net ionic equation.
Hence, the net ionic equation is 
Answer: C. The production of heat, light and smoke
Explanation: In a chemical reaction taking place several evidence are the presence of light emission and heat is generated in the reaction. Smoke is also an indication when a chemical reaction is happening such as combustion reaction.
Answer:
Option D
A reversible process is one in which a large change in conditions can reverse its direction.
Explanation:
A. Temperatures of a few nanokelvins can be achieved in a Bose-Einstein condensate. TRUE
b. A perfect crystal of any substance at 0 K has minimum entropy. is TRUE
c. The standard molar entropy of a substance at temperature T is a measure of the quantity of energy that must be dispersed in that substance for it to exist at T. is TRUE
d. A reversible process is one in which a large change in conditions can reverse its direction. is FALSE
e. Entropy is a measurement of the nanoscale dispersal of energy in a sample of matter. is TRUE
A reversible reaction is one that can return to it's normal direct even if an infinitesimal change is applied to some of it's conditions.
