The p-Block Elements (Group 15)-Important Questions & Preparation Tips

CBSE Class 12th Chapter, The p-Block Elements (Group 15) carries 08 Marks in board exam. Experts of Jagranjosh.com offer the best practice material that covers all important questions so that students will not miss any portion while preparing for board exams or competitive exams. Consider the mentioned terms/questions at the time of studying.

• General electronic configuration of p Block elements
• P-Block element brings diversification. Explain
• What are pnictogen?
• Nitrogen family elements are less reactive. Why?

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• The most reactive and most abundant element of 15^th group element
• Name the mental, non metals and metalloids of 15^th groups elements
• Name the mono atomic element of group 15th 
• Smell of NH₃ and PH₃
• Arrange the hydrides in the increasing order of boiling point

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• Nitrogen forms only tri halides but not pentahalide. Why?
• What is inert pair effect?
• All Halides are covalent but BiF₃ is ionic. Reason
• Write the formula for hydrozoic acid?
• Write the ions when PCl₅ and PBr₅   are   ionized

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• Write the acidic, basic and amphoteric  oxide of group 15^th
• Nitrogen has 5 oxides like N₂O, NO, N₂O3, NO₂ and N₂O₅ with oxidation number 1,2,3,4 and 5 respectively. Identify the acidic and neutral oxides and also arrange them in increasing order of acidic character
•  Why nitric oxides behave as free radical?
• Why nitrogen dioxide is known as nitronium nitrate?
• (SiH₃)₃N is a planer while (CH₃)₃N is pyramidal in shape. Reason
• What are oxo-acids  or oxy-acids
• What is fisher salt?
• Except nitrogen all elements of group 15 forms sulphite. Reason
• Name the all three types of hydrides of nitrogen with chemical formula and also find the hybridization of N atom in all
• Why does R₃P = O exist but R₃N = O does not (R = alkyl group)?
• In the lab preparation methods of ammonia, quick lime (CaO) is used to remove the moisture while other dehydrating agents like CaCl₂, P₂O₅ and H₂SO₄ are not used. Reason
• Ammonia is collected over water. Why?
• Name one purification process where ammonia is obtained as side product
• Manufacturing of ammonia by Haber process and discuss on the conditions favorable for the haber process
• Difference between red phosphorus and white phosphorus
• Name the two forms of black phosphorus
• Preparation method and properties of phosphine
• Uses of phosphine
• Prove that phosphine is basic in nature
• Bond angle in PH₄⁺ is higher than that in PH₃. Why?
• Why does PCl₃ fume in moisture?
• Ionized form of PCl₅
• Special attention on the given table content and their structures

• How do you account for the reducing behavior of H₃PO₂ on the basis of its structure?
• Give the disproportionation reaction of H₃PO₃.

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