Chemistry
P, Q, R and S are the different methods of preparation of salts.
P – Simple displacement
Q – Neutralisation by titration
R – Precipitation
S – Direct combination
Choose the most appropriate method to prepare the following salts:
(a) PbCl2
(b) FeCl3
(c) Na2SO4
Related Questions
Acidulated water is electrolysed using platinum electrodes. Answer the following questions:
(a) Why is dilute sulphuric acid added to water?
(b) Write the reaction taking place at the cathode.
(c) What is the observation at the anode?
(a) State Avogadro’s Law.
(b) Define Co-ordinate bond.
Differentiate between the following pairs of compounds using the reagent given in the bracket:
(a) Ammonium chloride and Sodium chloride (using an alkali)
(b) Zinc Nitrate solution and Calcium Nitrate solution (using excess sodium hydroxide solution)
You are provided with some compounds in the box.
PbO CH4 PbO2 CO2 HCl NCl3 SO2 Choose the most appropriate compound which fits the descriptions (a) to (c) given below:
(a) A colourless gas which turns acidified K2Cr2O7 from orange to green.
(b) A yellow explosive oily liquid formed when excess chlorine gas reacts with ammonia gas.
(c) A yellow metallic oxide formed on thermal decomposition of PbCO3.