|I:||Acid strength increases in the order given as HF < HCl < HBr < HI.|
|II:||As the size of the elements F, Cl, Br, I increases down the group, the bond strength of HF, HCI, HBr, and HI decreases and so the acid strength increases.|
|1.||I is correct but II is false.|
|2.||I is incorrect but II is true.|
|3.||Both I and II are true.|
|4.||Both I and II are false.|
Which of the following is incorrect regarding noble gases?
|1.||Noble gases have weak dispersion forces.|
|2.||Noble gases have large positive values of electron gain enthalpy.|
|3.||Noble gases are sparingly soluble in water.|
|4.||Noble gases have very high melting and boiling points.|
In which one of the following arrangements the given sequence is not strictly according to the properties indicated against it?
|1.||NH3 < PH3 < AsH3 < SbH3||Increasing acidic character|
|2.||CO2 < SiO2 < SnO2 < PbO2||Increasing oxidizing power|
|3.||HF < HCl < HBr < HI||Increasing acidic strength|
|4.||H2O < H2S < H2Se < H2Te||Increasing pKa values|
Which of the following compound of sulphur has linkage?
Match the compounds of Xe in column I with the molecular structure in column II.
|(a) XeF2||(i) Square planar|
|(b) XeF4||(ii) Linear|
|(c) XeO3||(iii) Square pyramidal|
|(d) XeOF4||(iv) Pyramidal|
Which is the correct thermal stability order for
Match the Xenon compounds in ColoumnI with its structure in Column-II and assign the correct code:
|Column I||Column II|
Match the following:
|(a) Pure nitrogen||(i) Chlorine|
|(b) Haber process||(ii) Sulphuric acid|
|(c) Contact process||(iii) Ammonia|
|(d) Deacon's process||(iv) Sodium azide or Barium azide|
Which of the following statements about PCl5 is false?
|1.||PCl5 molecule is non-reactive|
|2.||Three equatorial P-Cl bonds make an angle of 120° with each other|
|3.||Two axial P-Cl bonds make an angle of 180° with each other|
|4.||Axial P-Cl bonds are longer than equatorial P-Cl bonds|
The correct structure of tribromo octoxide is: