The product obtained on mixing calcium oxide with water is called __________________?
A. Quicklime
B. Slaked lime
C. Milk of lime
D. None of these
Month: February 2019
Which of the following additives/water proofing agents is added to lower the hydrophilic (moisture loving) characteristic of cement ?
Which of the following additives/water proofing agents is added to lower the hydrophilic (moisture loving) characteristic of cement ?
A. Xanthates
B. Stearic acid
C. Calcium & aluminium stearate
D. Formic acid
Sodium salt of higher molecular weight fatty acid is termed as the ______________________ soap?
Sodium salt of higher molecular weight fatty acid is termed as the ______________________ soap?
A. Hard
B. Soft
C. Metallic
D. Lubricating
Pick out the wrong statement pertaining to solvent extraction of oil. Rate of extraction__________________?
Pick out the wrong statement pertaining to solvent extraction of oil. Rate of extraction__________________?
A. Decreases with decrease of thickness of the flakes
B. Increases with the increasing flake size keeg the flake thickness constant
C. Increases considerably with the rise of temperature
D. Decreases as the moisture content of flakes increases
Hydrazine is largely used____________________?
Hydrazine is largely used____________________?
A. As a starting material for ‘hypo’
B. In photographic industry
C. As rocket fuel
D. In printing industry
Vulcanisation of rubber____________________?
Vulcanisation of rubber____________________?
A. Decreases its tensile strength
B. Increases its ozone & oxygen reactivity
C. Increases its oil & solvent resistance
D. Converts its plasticity into elasticity
How much temperature is maintained during quicklime manufacture in the calcination zone of the vertical shaft kiln ?
How much temperature is maintained during quicklime manufacture in the calcination zone of the vertical shaft kiln ?
A. 500°C
B. 750°C
C. 1000°C
D. 1500°C
______________ is produced using molasses as the starting raw material ?
______________ is produced using molasses as the starting raw material ?
A. Methyl alcohol
B. Ethyl alcohol
C. Benzol
D. Dimethyl ether
Acetone is produced by catalytic dehydrogenation of_________________?
Acetone is produced by catalytic dehydrogenation of_________________?
A. Phenol
B. Naphthalene
C. Isopropanol
D. Ethyl benzene
In the production of soda ash by Solvay process, the by-product is____________________?
In the production of soda ash by Solvay process, the by-product is____________________?
A. CaCl2
B. NH4Cl
C. NH3
D. NaOH