# DAILY PRATICE PROBLEMS

Educator à Study Innovations
25 Mar 2023
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### DAILY PRATICE PROBLEMS

• 1. INORGANICCHEMISTRY Daily Practice Problems Q.1 The formationofionic solids fromthe elements is anexothermic process. This isprimarilydue to (A) The low values for vaporisationofthe metals (B) Theelectronaffinityterm (C) The large values ofthe Latticeenergyofthese solids.(D) The low values for I.E. ofthe metals Q.2 Given the electronegativities of three elements x = 1.0 y = 2.5 z = 3.0 Type of bonding formed between xz and yz respectively would be: (a) Covalent, ionic (b) Ionic, covalent (c) Polar covalent, covalent (d) None of the above Q.3 CO2 is isosteric with: (1) HgCl2 (2) SnCl2 (3) C2 H2 (4) NO2 The correct answer is : (a) 1, 2 (b) 2, 3 (c) 1, 3 (d) 2, 4 Q.4 Which of the following is not applicable- (A) CO2 irregular geometry (B) BF3 regular geometry (C) NH3 irregular geometry (D) SO2 irregular geometry Q.5 C-C bond in C2 H6 undergoes heterolytic fission, the hybridisation of Carbon is/are  (A) SP2 (B) SP3 (C) SP2 , SP3 (D) SP, SP2 Q.6 The halogen form compounds among thenselves with formula XX’, X ' 3 X , X ' 5 X , X ' 7 X where X is the heavier halogen. Which of the following pairs representing their structures and being polar and non-polar are correct- (A) XX’LinearPolar (B) X ' 3 X T-shapedPolar (C) X ' 5 X Square PyramidalPolar (D) X ' 7 X PBPNon Polar Q.7 The value ofH0 forthe reactions Cu+ (g)+ I– (g)  CuI(g)is –446 KI. Ifthe I.E. ofCu(g)is 745 kJ/mol and the E.A. ofI (g) is –295 kJ/mol, thenthe value ofH0 for the formationofone mole ofCuI(g) ion– pairs fromCu(g) and I(g) is (A) –446 kH (B) 450 KI (C) 594 kJ (D) 4 kJ Q.8 Whichofthe following reactions are not possible/possible? (a) Sn2+ + 2Hg2+  Hg2 2+ + Sn+4 (b) Ge2+ + Pb4+  Pb2+ + Ge+4 (c) Tl+1 + Ga3+  Ga+ + Tl3+ Q.9 Predict the shapes of (a) TeCl4 (b)ClO3 (c) Cl  3 O Q.10 Cl  2 F is linear but the ion Cl  2 F is bent explain. CLASS : XI(J) DPP. NO.-17
• 2. INORGANICCHEMISTRY Daily Practice Problems Q.1 Discuss the hybridization and shapes ofthe following species– (a) (NH3 )2+ (b) CH3 + (c) NO2 – (d) NO2 + (e) H2 O2+ (f) ICl4 – (g) OSF2 (h) O2 SF2 (i) OSF4 (j) TeCl4 (k) ClO3 + Q.2 Why? Q.3 Which one ofeach ofthe following pairs is expected to have the largerbond angle? (a) H2 O & NH3 (B) SF2 & BeF2 (C) BF3 & BF4 – (D) NH3 & NF3 Q.4 Polarisation may be called as the distortion of the shape of an anion by an adjacently placed cation. Whichofthe following statement(s) is(are) not correct? (A*) Minimumpolarisationis brought about bya cation oflow radius. (B*)Alarge cation is likelyto bring about a largedegree ofpolarisation. (C) Maximumpolarisation is brought about bya cation ofhigh charge (D)*)Asmallanion is likelyto undergo a large degree ofpolarisation Q.5 Compare polarizing power ofthe following ions Li+ , Be2+ , B3+ & Na+ Q.6 Whichcharge the following atoms would bearin the following ofanionic bond. Justify. (a) Cs+ , Cs2+ (b) Ba+ , Ba2+ , Ba3+ (c)Al+ ,Al3+ (d) O2– , O4+ , O6+ (e) Pb2+ , Pb4+ Q.7 At 1 atmpressure and300 K, densityofHFmolecules is3.25 gm/lt. NumberofHFmolecules associated in a cluster is (A) 2 (B) 3 (C*) 4 (D) 6 Q.8 What is uncertainityinlocationofaprotonofwavelength5000Åifwavelengthis knownto anaccuracy of 1 pm? (A) 8 × 10–14 m (B) 0.02 m (C) 3.9 × 10–8 m (D) none Q.9 (a) Increasing covalent character TiCl2 , TiCl3 ,TiCl4 (b) Increasingionic character VCl2 , VCl3 , VCl4 Q.10 Ameasurement establishespositionofaprotonwithanaccuracyof10–10 m.Findtheminimumuncertainity in proton’s position1 second later. CLASS : XI(J) DPP. NO.-18