Home
Class 12
CHEMISTRY
The incorrect statements among the fol...

The incorrect statements among the following is
I. `NCl_(5)` does not exist while `PCl_(5)` does
II. Lead prefers to form tetravalent compounds
III . The three C-O bonds are not equal in the carbonate ion
IV Both `O_(2)^(+)` and NO are paramagnetic

A

a) I,III and IV

B

b) I and IV

C

c) II and III

D

d) I and III

Text Solution

Verified by Experts

The correct Answer is:
C
(I) In nitrogen d- orbitals are absent are absent , so it does not form `NCl_(5)` . Thus , `NCl_(5)` does not exist but `PCl_(5)` does .
(II) `Pb^(2+)` is more stable than `Pb^(4+)` , due to inert pair effect .
(III) In carbonate ion `(CO_(3)^(2-))` all the three C-O bonds are identical due to resonance ,

(IV) `O_(2)^(+)(8+8-1=15)=sigma1s^(2),sigma^(**)1s^(2),sigma2s^(2),sigma^(**)2s^(2),sigma2p_(x)^(2),pi2p_(y)^(2)~~2p_(z)^(2)overset(**)(pi)2p_(y)^(1)`
NO `(7+8=15)`
Hence , both `O_(2)^(+)andNO` contains one unpaired electron , so paramagnetic .
Promotional Banner

Similar Questions

Explore conceptually related problems

Choose the correct choice containing true statements regarding PCl_(5) . (i) PCl_(5) is prepared by the reaction of white phosphorus with excess of dry chlorine. (ii) The complete hydrolysis of PCl_(5) gives phosphoric acid. (iii) PCl_(5) has square pyramidal structure in gaseous phase. (iv) All the give bonds in PCl_(5) molecule are equivalent.

Which of the following statements is incorrect ? (1) Decreasing order of stability of O_2, O_ 2- , O _2+ is O_2+ > O_2 > O_2- . (2) He_ 2 molecule does not exist as the bonding and antibonding effects cancel each other. (3) C_2, O_2 ^2- , and Li_2 are diamagnetic. (4) In F_2 molecule the energy of sigma _(2_(p_(z))) is greater than that of pi _(2p_(x)), and pi_(2 _(p _(y)))

Which of the following is a statement? (i) x+2=9 (ii) 6 has three prime factors (iii) x^(2)+5 x+6=0

Themal decomposition of ammonium tetrafluoroberyllate gives X, heating Beryllium oxide with carbon and Cl_(2) gas at 600-800 K gives Y and reduction of Y using is LiAlH_(4) is Z. Then I) X has electronegativity difference of 2.5 and exhibit covalent nature II) Y shows acidic nature in water III) The O-H bond strengthens in the hydrated ion formed on the hydrolysis of Y IV) In Z, the oxidationi state of H is +1

Find the true statement/statements a) In a given period Delta_(i)H_(1) is the lowest for an alkali metal and highest for noble gas. b) Cs has the lowest and He has the highest Delta_(i)H_(1) among all elements. c) Lowest Delta_(i)H_(2) among the elements of third period is for Mg. d) The metal with the highest Delta_(i)H_(1) is mercury. e) Ni (II) compounds are thermodynamically more stable than Pt(II) compounds while Ni(IV) compound are less stable than Pt(IV) compounds.

Which of the following statements are true? i) Elements which are least reactive occur in free state or native state ii) Earthly or undesired materials present along with ore are called gangue iii) Among metals, aluminium is the most abundant in the earth crust iv) All ores are minerals but all minerals are not ores v) Gemstone "Ruby" is the impure form of Al_2O_3 containing impurity : Co vi) The set of d-block elements Cu, Ag, Au mostly occur as sulphide ore