The P-Block exists in the rightmost corner of the periodic table. The P-block consists of diverse elements in terms of the physical state, properties, bonding and the structures of the elements. The elements of P-block include the nitrogen family, the oxygen family, the halogen family and the noble gases. In all of these elements, the last electron (the valence electron) falls into the p-orbital. Hence, these are simply put into the p-block of elements.
Download Class 12 Chemistry Worksheet on Chapter 7 The P-Block Elements Set 5 PDF.
CBSE Class 12 Chemistry Chapter 7 The P-Block Elements Worksheet – Set 5
Q-1: In BrF3, the lone pairs occupy the equatorial positions in order to minimise the
a.) Lone pair and bond pair repulsions
b.) Bond pair-bond pair repulsions
c.) Lone pair -lone pair and bond pair- lone pair repulsions
d.) Lone pair-lone pair repulsions
Q-2: The element that forms oxides in all oxidation states from +1 to +5 is:
a.) P
b.) Sb
c.) As
d.) N
Q-3: Arrange HCl, HF, HBr, and HI in decreasing order of thermal stability.
Q-4: The acid containing the O-O bond is:
a.) H2S2O3
b.) H2S4O6
c.) H2S2O6
d.) H2S2O8
Q-5: Why are most of the reactions of Fluorine (F) exothermic?
Q-6: The number of lone pairs in XeOF4 is:
a.) 0
b.) 1
c.) 2
d.) 3
Q-7: Why is Ozone thermodynamically unstable?
Q-8: Arrange Xe, He, Kr, Rn and Ne in increasing order of electron gain enthalpy.
Q-9: The correct choice for H3PO3 and H3PO4 is:
a.) H3PO3 is dibasic and has a reducing nature.
b.) H3PO3 is dibasic and is non-reducing in nature.
c.) H3PO4 is tribasic and has a reducing nature.
d.) H3PO3 is tribasic and is non-reducing in nature.
Q-10: Draw the structures of H2S2O8 and HOClO2.
Q-11: Why only Xenon out of all the noble gases forms compounds with oxygen and fluorine?
Q-12: Why is PbO2 a stronger oxidising agent than SnO2?
Q-13: Why does sulphur (S) in its vapour state exhibit paramagnetism?
Q-14: Why is fluorine the strongest oxidising agent among all halogens?
Q-15: Find [X] and [Y] given that:
[X] + H2SO4 → [Y]; [Y] is a colourless gas with irritating odour [Y] + K2Cr2O7 + H2SO4 → Green coloured solution [X] and [Y] respectively are:a.) SO32- and SO2
b.) Cl– and HCl
c.) CO32- and CO2
d.) S2- and H2S
Q-16: Write a method of synthesis of XeF4.
Q-17: Which of the following species are isoelectronic and isostructural?
NO3–, CO32-, ClO3–, SO3
a.) NO3– and CO32-
b.) SO3 and NO3–
c.) ClO3 and CO32-
d.) CO32- and SO3
Q-18: Give the reason for: SF6 is not hydrolysed by water but SF4 is.
Q-19: Complete the following reaction:
Ca3P2 + H2O →
Q-20: Write the step-by-step preparation of sulphuric acid by the contact process.
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