Organic Chemistry — Chemistry STD 10 — Question

What do you observe when Ammonium solution is added to ferric chloride solution.

How many electrons are required or released by each atom mentioned in (a) to attain the nearest noble gas configuration ?

Calculate the number of gram atoms in 4.6 gram of sodium

Identify the following substances:
(i) An alkaline gas A which gives dense white fumes with hydrogen chloride.
(ii) A dilute acid B which does not normally give hydrogen when reacted with metals but does give a gas when it reacts with copper.
(iii) Gas C has an offensive smell like rotten eggs
(iv) Gas D is a colourless gas which can be used as a bleaching agent
(v) Liquid E can be dehydrated to produce ethene

Identify the term or substance based on the descriptions given below :
(i) Ice like crystals formed on cooling an organic acid sufficiently.
(ii) Hydrocarbon containing a triple bond used for welding purposes.
(iii) The property by virtue of which the compound has the same molecular formula but different structural formulae.

State your observation of the following case :
At the cathode when acidified aqueous copper sulphate solution is electrolyzed with copper electrodes

Write equations for the action of heat on :
(i) Ammonium chloride (ii) Ammonium nitrate.
State whether each reaction is an example of thermal decomposition or thermal dissociation.

Answer the following question:
What is the difference between calcination and roasting?