What is the correct answer?


Type of glass used in optical work is the __________ glass.

A. Soda-lime

B. Fibre

C. Lead

D. Borosilicate

Correct Answer :

C. Lead

Related Questions

The main use of HCl is in the 99.5% purity oxygen is used in Ore concentration by froth floatation utilises the __________ of ore particles. Na2CO3 is called Tall oil obtained as a by-product from the black liquor recovery is Bromine is used in the preparation of Pick out the false statement pertaining to water treatment. __________ is a thermosetting plastic. In an integrated steel plant, NH3 present in coke oven gas is normally… Percentage of uranium in Carnotite ore found in Jadugoda (Jharkhand) is… Alcohol is produced by the Reaction of an alcohol with organic acid is called the __________ reaction. Coagulant is used __________ filtration. The metallic aluminium is obtained from pure alumina in the presence of… Sulphur addition in soap is done to Baking soda is chemically represented by Pick out the wrong statement. Chloramines are used in water treatment for Basic oxide is absent in __________ glass. Which of the following is the second major component of cement? Permanent hardness of water is due to the presence of calcium & magnesium Alkylbenzene sulfonate (ABS) is a Naphthalene is removed from coke oven gas by Mannheim furnace is used in the manufacture of Lindane is The catalyst used in the manufacture of DDT is Production of one ton of dry paper pulp requires about __________ tons… __________ is used as a flux in the extraction of iron from iron ore (haematite)… __________ acid is the main constituent of cotton seed oil. Which of the following is used as a coagulant in water treatment?