While assigning R, S configuration, the correct order of priority of groups attached to chiral carbon atom is
CONH2 > COCH3 > CH2OH > CHO
CONH2 > COCH3 > CHO > CH2OH
COCH3 > CH2OH > CHO > CH2OH
CHO > CH2OH > COCH3 > CONH2
How many Faradays of electricity are required to deposit 10g of calcium from molten calcium chloride using inert electrodes? ( Molar mass of calcium = 40g mol-1)
0.5 F
1F
0.25 F
2 F
What is the general molecular formula of the product obtained on heating lanthaniods (Ln) with sulphur?
LnS
LnS3
Ln3S2
Ln2S3
In the cell represented by
Pb(s)|Pb2+(1M) || Ag+(1M)| Ag(s), the reducing agents is
Pb2+
Pb
Ag
Ag+
Which metal crystallises in a simple cubic structure?
Polonium
Copper
Nickel
Iron
A.
Polonium
In a simple cubic structure, the spheres are not packed as closely as they could be, and they only fill about 52% of the volume of the container. This is relatively inefficient arrangement and only one metal (polonium, Po) crystallises in a simple cubic structure. For a polonium atom in a simple cubic array, the coordination number is six.
How is sodium chromate converted into sodium dichromate in the manufacture of potassium dichromate from chromite ore?
By the action of concentrated sulphuric acid
By roasting with soda ash
By the action of sodium hydroxide
By the action of limestone