The P-Block elements are diverse in the case of type of elements, their properties, bonding and their structures. The elements of P-block include the nitrogen family elements- the pnicogens, oxygen family elements- the chalcogens (the elements which form ores), the halogen family- the elements which form the sea salt and the noble gases- the aerogens ( found in air).
Download Class 12 Chemistry Worksheet on Chapter 7 The P-Block Elements Set 4 PDF.
CBSE Class 12 Chemistry Chapter 7 The P-Block Elements Worksheet – Set 4
Q-1: The ionic species that contain a p𝜋-d𝜋 bond is____.
a.) NO3–
b.) CO32-
c.) SO32-
d.) BO33-
Q-2: The correct statement for H3PO2, H3PO3, and H3PO4 acids is:
a.) The order of acidity of the given acids is: H3PO4 > H3PO3 > H3PO2
b.) All acids possess the reducing nature
c.) Given acids are tribasic acids
d.) Geometry of phosphorus is tetrahedral in all three acids
Q-3: What is the Haber’s Process?
Q-4: Pick the incorrect statement.
a.) Iodide ion is the most powerful reducing agent among all halides.
b.) Among halogens, only fluorine does not show a variable oxidation state.
c.) HF is a stronger acid than HCl.
d.) HOCl is a stronger acid than HOBr.
Q-5: Why is helium considered unusual?
Q-6: Which of the following can oxidise water to oxygen?
a.) H2O2
b.) ClO2
c.) KMnO4
d.) F2
Q-7: Which of the following compounds have the highest proton affinity?
NH3, H2O, H2S and PH3
Q-8: Why is ICl more reactive than I2?
Q-9: The product when phosphorus (P) is boiled with the KOH solution is___.
a.) Potassium sulphate
b.) Potassium hydroxide
c.) Phosphine
d.) Phosphorus pentoxide
Q-10: What is the hybridisation and shape of SF4?
Q-11: Why does sulphurous acid act as a reducing agent?
Q-12: Complete the following chemical equation:
Q-13: Why do the hydride of oxygen and the hydride of sulphur exist in different states?
Q-14: Why chlorine has a higher electron affinity than fluorine?
Q-15: The total number of lone pairs in XeOF4 are___.
a.) 2
b.) 3
c.) 1
d.) 0
Q-16: Why are halogens diatomic in nature?
Q-17: The product when XeF4 is treated with water is___.
a.) Xe
b.) XeO3
c.) Xe and XeO3
d.) XeO3 and XeOF4
Q-18: Why is the reactivity of nitrogen different from phosphorus?
Q-19: Why is helium gas used in the diver’s apparatus?
Q-20: Give the chemical equations for the preparation of two poisonous gases that are prepared from chlorine.
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