Test Details

P Block

Nov 02, 11:00 AM

20 minutes

Mar 04, 11:00 AM

15.0 marks

MCQ

15 questions

priyanka Chaudhary

teacher

Class Details

Physics

Class 12

Physics

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Question Text

Question 1 :
H2S is more acidic than H2O because (a) oxygen is more electronegative than sulphur. (b) atomic number of sulphur is higher than oxygen. (c) H — S bond dissociation energy is less as compared to H — O bond. (d) H — O bond dissociation energy is less also compared to H — S bond.

Question 2 :
The boiling points of hydrides of group 16 are in the order (a) H2O > H2Te > H2S > H2Se (b) H2O > H2S > H2Se > H2Te (c) H2O > H2Te > H2Se > H2S (d) None of these

Question 3 :
In the manufacture of sulphuric acid by contact process Tyndall box is used to (a) convert SO2 and SO3 (b) test the presence of dust particles (c) filter dust particles (d) remove impurities

Question 4 :
The set with correct order of acidity is (a) HClO < HClO2 < HClO3 < HClO4 (b) HClO4 < HClO3 < HClO2 < HClO (c) HClO < HClO4 < HClO3 < HClO2 (d) HClO4 < HClO2 < HClO3 < HClO

Question 5 :
The increasing order of reducing power of the halogen acids is (a) HF < HCl < HBr < HI (b) HI < HBr < HCl < HF (c) HBr < HCl < HF < HI (d) HCl < HBr < HF < HI

Question 6 :
Among the 15th group elements, as we move from nitrogen to bismuth, the pentavalency becomes less pronounced and trivalency becomes more pronounced due to (a) Non metallic character (b) Inert pair effect (c) High electronegativity (d) Large ionization energy

Question 7 :
Which of the following statements is not correct for nitrogen? (a) Its electronegativity is very high (b) d-orbitals are available for bonding (c) It is a typical non-metal (d) Its molecular size is small

Question 8 :
Collectively the elements of group 15 are called – (a) pnicogens (b) pnicopens (c) nicopen (d) None of these

Question 9 :
Which one of the following elements is most metallic ? (a) P (b) As (c) Sb (d) Bi

Question 10 :
Which of the following has the highest pπ – pπ bonding tendency ? (a) N (b) P (c) As (d) Sb

Question 11 :
Which one of the following is the strongest lewis acid? (a) BF3 (b) BCl3 (c) BBr3 (d) Bl3

Question 12 :
Which one of the following does not form hydrogen bonding? (a) NH3 (b) H2O (c) HCl (d) HF

Question 13 :
Which of the following is the strongest oxidising agent? (a) F2 (b) Cl2 (c) l2 (d) Br2

Question 14 :
Atomicity of phosphorus is (a) 1 (b) 2 (c) 3 (d) 4

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