Main constituent of limestone is____________________?
Main constituent of limestone is____________________?
A. CaCO3
B. MgCO3
C. Na2CO3
D. CaSO4
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Manufacture of phthalic anhydride uses __________ as a catalyst.
Question: Manufacture of phthalic anhydride uses __________ as a catalyst.
[A].Ni [B].
Cr [C].
V2O5 [D].
Al2O3 Answer: Option C
Explanation:
No answer description available for this question.
Which of the following is a bleaching agent added in the detergents to facilitate removal of stains caused due to blood, tea etc ?
Which of the following is a bleaching agent added in the detergents to facilitate removal of stains caused due to blood, tea etc ?A. Sodium silicate
B. Sodium borate
C. Sodium tripolyphosphate (STPP)
D. Caustic sodaBaking soda is chemically represented by__________________?
Baking soda is chemically represented by__________________?A. Na2CO3
B. NaHCO3
C. Na2CO3.H2O
D. Na2CO3.10H2OCarborundum consists mainly of_________________?
Carborundum consists mainly of_________________?A. Bauxite
B. Silicon carbide
C. Boron carbide
D. Calcium carbideHydrogen gas is not produced commercially (for nitrogenous fertiliser manufacture) by _____________________?
Hydrogen gas is not produced commercially (for nitrogenous fertiliser manufacture) by _____________________?A. Iron-steam reaction
B. Electrolysis of water
C. Steam reforming of naphtha
D. Its cryogenic separation from coke oven gasNeon gas is
Question: Neon gas is
[A].flammable in nature. [B].
used in color discharge tube. [C].
filled in lamps having tungsten filament. [D].
all (a), (b) and (c). Answer: Option B
Explanation:
No answer description available for this question.