In Periodic Table, the basic character of oxides

• increases from left to right and decreases from top to bottom

• decreases from right to left and increases from top to bottom

• decreases from left to right and increases from top to bottom

• decreases from left to right and increases from bottom to top

12.

Which one of the following contains P-O-P bond?

• Hypophosphorus acid

• Phosphorus acid

• Pyrophosphoric acid

• Orthophosphoric acid

Which of the following orbitals will have zero probability  of finding the electron in the y_Z plane. 

• p_x

• p_y

• p_z

• d_yz

What type of orbital hybridisation is considered on P in PCl₅?

• sp³d

• dsp³

• sp³d²

• d²sp³

In haemoglobin, the metal ion present is

• Fe²⁺

• Zn²⁺

• Co²⁺

• Cu²⁺

The bond order of CO molecule is

• 2

• 2.5

• 3

• 3.5

Which of the following orders regarding ionisation energy is correct?

• N > O > F

• N < O < F

• N > O < F

• N < O < F

Which of the following compounds shows evidence of the strongest hydrogen bonding?

• Propan-1-ol

• Propan-2-ol

• Propan-1,2-diol

• Propan-1,2,3-triol

Identify [A] and [B] in the following

${}_{89}{}^{227}\mathrm{Ac} \stackrel{-\mathrm{\beta }}{\to } \left[\mathrm{A}\right] \stackrel{-\mathrm{\alpha }}{\to } \left[\mathrm{B}\right] \stackrel{-\mathrm{\alpha }}{\to } \mathrm{Rn}$

• Po, Rn

• Th, Po

• Ra, Th

• Th, Ra

A weak acid of dissociation constant 10^-5 is being titrated with aqueous NaOH solution. The pH at the point of one-third neutralisation of the acid will be

• 5 + log 2 - log 3

• 5 - log 2

• 5 - log 3

• 5 - log 6