A. Less susceptible to chemical attack by molten fluxes and gases etc
B. Very strong
C. Having very high thermal conductivity
D. None of these
Related Mcqs:
- Refractory bricks having high thermal conductivity is desirable, when it is to be used in the _________________?
A. L.D. converter
B. Blast furnace
C. Rotary kiln
D. Recuperator - Refractory bricks burnt at very high temperature have got______________?
A. Greater resistance to corrosion by slags
B. Less resistance to corrosion by slags
C. High spalling tendency
D. None of these - Resistance to fusion of the refractory under a steady rising temperature condition is called ____________________ ?
A. Spalling
B. Refractoriness
C. Both A. & B.
D. Neither A. nor B. - Platinum is a versatile catalyst for many processes in chemical industries. It is highly prone to be poisoned by the presence of_________________?
A. Carbon
B. Arsenic
C. Lead
D. Sulphur - Double Contact Double Absorption (DCDA) process is the most recent process for the manufacture of ____________________?
A. Nitric acid
B. Sulphuric acid
C. Ammonium sulphate
D. Hydrochloric acid - Polymethyl methacrylate (PMMA) is known as ____________________?
A. Bakelite
B. Teflon
C. Perspex
D. Nylon-6 - Enzymes are organic catalysts used in the ____________________ reactions ?
A. Chemical
B. Biochemical
C. Photochemical
D. Electrochemical - A mineral is termed as ‘ore’, if ____________________?
A. A metal can be economically extracted from it
B. It contains ≥ 40% metal
C. The metal present in it is costly
D. All A , B. and C. - ____________________ of rubber decreases after its vulcanisation?
A. Resistance to the action of organic solvent
B. Tackiness
C. Maximum service temperature
D. Tensile strength - Zeolite is used in the ____________________ ?
A. Water treatment
B. Glass manufacture
C. Hydrogenation of fatty oil as a catalyst
D. Development of exposed photographic plate
