Which of the following statements is not valid for oxoacids of phosphorus?
Solution
Match List – I (substances) with List – II (processes) employed in the manufacture of the substances and select the correct option.
List – IList – II
SubstancesProcesses
(A) Sulphuric acid (i) Haber’s process
(B) Steel (ii) Bessemer’s process
(C) Sodium hydroxide (iii) Leblanc process
(D) Ammonia (iv) Contact process Options
Solution
(A)Sulphuric acid (iv)Contact process
(B)Steel (ii)Bessemer’s process
(C)Sodium hydroxide (iii)Leblanc process
(D)Ammonia (i)Haber’s process
In compounds of type ECl3, where E = B, P, As or Bi, the angles Cl – E- Cl for different E are in the order
Solution
In BCl3,H = 1⁄2(3 + 3 + 0 + 0) = 3 ; sp2 hybridization(bond angle = 120°) similarly PCl3 As Cl3 and BiCl3 are found to have sp3 hybridized central atom with one lone pair of electrons on the central atom. The bond angle ≤ 109°28', since the central atoms belong to the same group, the bond angle of the chlorides decreases as we go down the group. Thus the order of bond angle is, BCl3> PCl3> AsCl3 > BiCl3
In the preparation of sulphuric acid, V2O5 is used in the reaction, which is
Which of the following iodide is least stable and has doubtful existence?
Solution
Due to inert pair effect.
KF combines with HF to form KHF2. The compound contains the species.
Solution
KF + HF → KHF2 \(\rightleftharpoons\) K+ + [HF2]-
Which of the following acts as pickling agent?
Solution
Pickling agent is H2SO4. Pickling is cleaning the surface of metals before enameling,electroplating and galvanising.
The correct order of heat of formation of halogen acids is
Solution
On moving from top to bottom of halogen group the bond dissociation energy of hydrogen halides decreases and so the heat of formation of halogen acids also decreases.
Euchlorine is a mixture of
Solution
Mixture of Cl2 and ClO2 acts as a bleaching agent and is called euchlorine.
Oxygen and sulphur both are the members of the same group in periodic table but H2O is liquid while H2S is gas because
Solution
H2O is liquid but H2S is a gas. This can be attributed to the presence of intermolecular hydrogen bonding in case of H2O.
