Chemistry
State a relevant reason for the following:
(a) Hydrogen chloride gas cannot be dried over quick lime.
(b) Ammonia gas is not collected over water.
Answer
(a) Quicklime [CaO] is alkaline in nature and it reacts with HCl forming the respective chloride. Hence, it can't be used as a drying agent for Hydrogen chloride gas.
CaO + 2HCl ⟶ CaCl2 + H2O
(b) As ammonia gas is highly soluble in water, therefore, it is not collected over water.
Related Questions
Arrange the following as per the instruction given in the brackets:
(a) Al, K, Mg, Ca (decreasing order of its reactivity)
(b) N, Be, O, C (increasing order of non-metallic character)
(c) P, Si, F, Be (decreasing order of valence electrons)
Complete and balance the following equations:
(a) NH4Cl + Ca(OH)2 ⟶
(b) CuSO4 + NH4OH ⟶
(c) Cu + Conc. HNO3 ⟶
Identify the alloy in each case from the given composition:
(a) aluminium, magnesium, manganese, copper
(b) iron, nickel, chromium, carbon
Solve the following numerical problem.
Ethane burns in oxygen according to the chemical equation:
2C2H6 + 7O2 ⟶ 4CO2 + 6H2O
If 80 ml of ethane is burnt in 300 ml of oxygen, find the composition of the resultant gaseous mixture when measured at room temperature.