CBSE Class 12 Chemistry The P Block Elements Question Bank

Class 12 Chemistry Practice Set: Unit 7 The p-Block Elements

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QUESTION BANK
The p-Block Elelments
 
VSA QUESTIONS (1 - MARK QUESTIONS)
 
1. In which one of the two structures,NO2+ and NO2 -, the bond angle has a higher value?
 
2. Which one of the following is not oxidized by O3. State the reason.
Kl, FeSO4, K2MnO4, KMnO4
 
3. Account for the following (Each question carries one mark)
 
i. Iodine is more soluble in KI, than H2O.
 
ii. R3P = O exist but R3N = Ocan not exist.
 
iii. N-N, bond is weaker than P-P, on the contrary N2 is very inert.
 
iv. Both Cl and O have the same electronegativity but only O forms H-bonding
 
v. NO is paramagnetic in the gaseous state but dimagnetic in liquid and solid state
 
vi. Among Halogens F2 is the strongest oxidising agent
 
vii. ICl bonds are weaker than Cl2.
 
viii. Hydrogen fluoride is much less volatile than hydrogen chloride
 
ix. Interhalogen compounds are strong oxidizing agents
 
x. PCl5 is ionic in nature in the solid state.
 
xi. Sulphur has greater tendency for catenation than Oxygen
 
xii. Phosphorous is more reactive than nitrogen.
 
xiii. Of the noble gases only xenon forms known chemical compounds
 
xiv. In solution of H2SO4 in water the second dissociation constant Ka2,is less than the first Ka1.
 
xv. Pentahalides of a metal is more covalent than its trihalides.
 
xvi. Fe dissolves in HCl to form FeCl2 ,not FeCl3.
 
xvii. Helium is used in diving equipments
 
4. Give reason for the following.((Each question carries one mark)
 
i. Nitrogen exhibits +5 oxidation state but does not form penta halides.
ii. Phosphine(PH3) is used in Holme’s signals.
iii. H3PO2 shows reducing behavior.
Group 16 elements show low rate of 1st Ionisation Energy than compared to corresponding periods of Group 15
 
5. Draw the structures of the following (Each question carries one mark)
i. H4P2O5
ii. HClO4
iii. BrF3
iv. H3PO3
v. H2S2O8
vi. HOCl2
 
6. Complete the following chemical equations. (Each question carries one mark)
i. XeF4 +O2F2 →
ii. Cu + HNO3 →
iii. HgCl2 +PH3 →
iv. I2 +HNO3 →
v. P 4 +SO2Cl2 →
vi. Cl2 + F2 →
vii. C + H2SO4 →
viii. Na2SO3 + Cl2 + H2O→
ix. NO3– + Fe2+ + H+
 
SA (I) QUESTIONS (2 - MARK QUESTIONS)
 
7. Compare the structures of SF6 and SF4
 
8. i. Write the composition of bleaching powder.
ii. What happens when NaCl is heated with conc. H2SO4 in the presence of MnO2. Write the chemical equation
 
9. i. Hydrolysis of XeF6 is not regarded as a redox reaction. Why?
ii. Write a chemical equation to represent the oxidising nature of XeF4.
 
10. A colourless and a pungent smelling gas which easily liquifies to a colourless liquid and freezes to a white crystalline solid, gives dense white fumes with ammonia. Identify the gas and write the chemical equation for its laboratory preparation
 
11. Explain the structure of the following using VSEPR theory.
i. XeO3
ii. XeF2
 
12. Write the chemical equations of the following reactions
i. Glucose in heated with conc. H2SO4.
ii. Sodium nitrate is heated with conc. H2SO4.

 

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Download CBSE Practice Material: Class 12 Chemistry Unit 7 The p-Block Elements

CBSE Practice Material: Class 12 Chemistry Unit 7 The p-Block Elements

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