Le-blanc process is employed in the manufacture of
baking soda
washing soda
potash
plaster of Paris
The number of atoms contained in a fee unit cell of a monoatomic substance is
1
2
4
6
C.
4
In a fcc unit cell, the number of comer atoms = 8 = 1
Each corner is shared with 8 other unit cells
The number of face atoms = 6 = 3
Thus, the total number of atoms per unit cell = 1 + 3 = 4
In the first order reaction, 75% of the reactant gets disappeared in 1.386 h. The rate constant of the reaction is
3.0 10-3 s-1
2.8 10 -4 s-1
17.2 10-3 s-1
1.8 10-3 s-1
Which of the following is known as invert soap?
Pentaerythritol monostearate
Sodium stearyl sulphate
Trimethyl stearyl ammonium bromide
Ethoxylated nonyphenol
Which one of these is not true for benzene?
It forms only one type of mono-substituted product
There are three carbon-carbon single bonds and three carbon-carbon double bonds
Heat of hydrogenation of benzene is less than its theoretical value
The bond angle between carbon-carbon bonds is 120°