PCl₃ on hydrolysis gives fumes of

• H₃PO₃ + HCl

• H₃PO₄ + HCl

• H₃PO₂ and H₃PO₃

• H₃PO₂ + HCl

First compound of Xe synthesized was

• [XeF]⁺[XePtF₅]^-

• [XeO₂]

• Xe[PtF₆]

• O₂[XeF₆]

The phosphate of a metal has the formula MHPO₄. The formula of its chloride would be

• MCl

• MCl₂

• MCl₃

• M₂Cl₃

The shape and hybridisation of some xenon oxyfluorides are given. Choose the wrong set.

• XeOF₂  - T-Shape-sp³d

• XeOF₄ - Square pyramidal-sp³d²

• XeO₂F₂ - Distorted trigonal bipyramidal-sp³d

• XeO₃F₂- Octahedral-sp³d

Assertion : Helium has the highest value of ionisation energy among all the elements known.

Reason : Helium has the highest value of electron affinity among all the elements known.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false.

• If both assertion and reason are false.

What is the correct relationship between the pHs of isomolar solutions of sodium oxide (pH₁), sodium sulphide (pH₂), sodium selenide (pH3) and sodium telluride (pH₄)?

• pH₁ > pH₂ = pH₃ =pH₄

• pH₁ <pH₂ < pH₃ <pH₄

• pH₁ < pH₂ > pH₃< pH₄

• pH₁> pH₂ > pH₃ > pH₄
  
  

When fluorine reacts with hot and conc. NaOH , it gives :

• Na₂O

• Na

• H₂

• O₂

End product of the hydrolysis of XeF₆ is :

• XeOF₄

• XeO₂F₂

• XeO₃

• XeOF₃

HF is not preserved in glass bottle because :

• it reacts with the visible part of the light

• it reacts with the sodium oxide of the glass

• it reacts with the aluminium oxide of the glass composition

• it reacts with SiO₂ of the glass

1240.

Which of the following is not hydrolysed ?

• AsCl₃

• PF₃

• SbCl₃

• NF₃