Which one of the following organic compound is used to remove stains of iron compounds?
A). Oxalic acid
B). Benzoic acid
C). Phthalic acid
D). Cinnamic acid
Oxalic acid
Oxalic acid is widely used as an acid rinse in laundries, where it is effective in removing rust and ink stains because it converts most insoluble iron compounds into a soluble complex ion.
1. When a spoon is to be electroplated with nickel the spoon is
2. Chemical name of vinegar is
3. The maximum number of covalent formed by nitrogen is
4. Two moles of an ideal gas expand freely into vacuum. The work done by the gas is
6. The most abundant inert gas in the atmosphere is
8. Super cooling stands for cooling of a liquid :
10. The resources which can be used continuously year after year ate called