The elements whose valence electrons fall into the p-subshell are called the p-block elements. These elements belong to groups 13-18 and have the general electronic configuration as ns2 np1-6; where the value of n lies between 2 to 6. The elements of p-block are diverse and include metals, metalloids and nonmetals.
Download Class 12 Chemistry Worksheet on Chapter 7 The P-Block Elements Set 2 PDF
CBSE Class 12 Chemistry Chapter 7 The P-Block Elements Worksheet – Set 2
Q-1: Which trihalide of nitrogen is least basic?
a.) NF3
b.) NCl3
c.) NBr3
d.) NI3
Q-2: Which is the most volatile HX compound?
a.) HI
b.) HBr
c.) HCl
d.) HF
Q-3: Write the structural formula of PCl5 in its solid state.
Q-4: Which among the following is the strongest acid?
a.) ClO2(OH)
b.) ClO3(OH)
c.) SO(OH)2
d.) SO2(OH)2
Q-5: Give an example of a neutral molecule that is isoelectronic with ClO–.
Q-6: Which one is a cyclic oxo-acid?
a.) H4P2O7
b.) H3P3O9
c.) H4P2O6
d.) H5P5O15
Q-7: Calculate the amount of CaO (in g) required to neutralise 852 g of P4O10.
Q-8: Give an instance for when a halide is oxidised by another halogen atom. Also determine the feasibility of the reaction.
Q-9: Which of the following acids form the two series of salts?
a.) H3PO3
b.) H3PO4
c.) H3BO3
d.) H3PO2
Q-10: SF4 undergoes hydrolysis but SF6 does not. Why?
Q-11: What is a superhalogen? What happens when superhalogen reacts with the cold dilute solution of sodium hydroxide (NaOH). Give an equation to support your answer.
Q-12: Complete the following reaction:
Q-13: Why does the freshly distilled colourless solution of HI turn brown with time?
Q-14: Give a chemical reaction for the synthesis of chlorine gas from bleaching powder.
Q-15: The correct order of acidic strength is represented in:
a.) Cl2O7 > SO2 > P4O10
b.) CO2 > N2O5 > SO3
c.) Na2O > MgO > Al2O3
d.) K2O > CaO > MgO
Q-16: Why does oxygen possess diatomic and gaseous nature?
Q-17: What happens when iodine (I2) is passed through KCl , KF and KBr?
a.) The chlorine and bromine gases are evolved
b.) Only chlorine gas is evolved
c.) Chlorine, bromine and fluoride gases are evolved
d.) None of the above
Q-18: In which form does sulphur exhibit paramagnetic property?
Q-19: What happens when the concentrated sulphuric acid is added to calcium fluoride?
Q-20: H2O is neutral but H2S is acidic. Explain why.
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