Practice Questions

Q33.Match List I with List II List I List II A. XeF4 I.See-saw B. SF4 II. Square planar JEE Main 2023 (31 Jan Shift 1) JEE Main Previous Year Paper C. NH4+ III. Bent T - shaped D.BrF3 IV. Tetrahedral Choose the correct answer from the options given below : (1) A - IV, B - III, C - II, D - I (2) A - II, B - I, C - III, D - IV (3) A - IV, B - I, C - II, D - III (4) A - II, B - I, C - IV, D - III

Q34.The correct order of metallic character is (1) K > Be > Ca (2) Be > Ca > K (3) Ca > K > Be (4) K > Ca > Be

Q34.Which of the following relations are correct? (A) ΔU = q + pΔV (B) ΔG = ΔH −TΔS (C) ΔS = qrevT (D) ΔH = ΔU −ΔnRT Choose the most appropriate answer from the options given below : (1) C and D only (2) B and C only (3) A and B only (4) B and D only

Q34.For 1 mol of gas, the plot of pV vs p is shown below. p is the pressure and V is the volume of the gas. JEE Main 2023 (29 Jan Shift 1) JEE Main Previous Year Paper What is the value of compressibility factor at point A ? (1) 1 − RTVa (2) 1 + Vb (3) 1 −bV (4) 1 + RTVa

Q34.H2O2 acts as a reducing agent in (1) 2NaOCl + H2O2 →2NaCl + H2O + O2 (2) 2Fe2 + + 2H+ + H2O2 →2Fe3 + + 2H2O (3) Mn2 + + 2H2O2 →MnO2 + 2H2O (4) Na2 S + 4H2O2 →Na2SO4 + 4H2O

Q34.The alkaline earth metal sulphate(s) which are readily soluble in water is/are: (A) BeSO4 (B) MgSO4 (C) CaSO4 (D) SrSO4 (E) BaSO4 Choose the correct answer from the options given below: (1) A only (2) B only (3) A and B (4) B and C

Q34.Which one of the following pairs is an example of polar molecular solids? (1) SO2( s), CO2( s) (2) SO2( s), NH3( s) (3) MgO(s), SO2(s) (4) HCl(s), AlN(s)

Q34.The bond order and magnetic property of acetylide ion are same as that of (1) O2+ (2) N2+ (3) NO+ (4) O2−

Q34.For elements B, C, N Li, Be, O and F, the correct order of first ionisation enthalpy is (1) Li < Be < B < C < O < N < F (2) B < Li < Be < C < N < O < F (3) Li < Be < B < C < N < O < F (4) Li < B < Be < C < O < N < F

Q34.Resonance in carbonate ion CO32 - is Which of the following is true? (1) It is possible to identify each structure (2) All these structures are in dynamic equilibrium individually by some physical or chemical with each other. method. (3) Each structure exists for equal amount of time. (4) CO32 - has a single structure i.e., resonance hybrid of the above three structures.

Q34.Match Column I with Column II Column I Column II A Soda ash I CaSO4 B Chlorophyll II CaOH2 C Used in Whitewashing III Na2CO3 D Dentistry, ornamental work IV Mg2 + ions (1) A – III, B – IV, C – I, D – II (2) A – II, B – I, C – III, D – IV (3) A – III, B – I, C – II, D – IV (4) A – II, B – III, C – IV, D – I

Q34.In which of the following processes, the bond order increases and paramagnetic character changes to diamagnetic one? (1) O2 →O+2 (2) O2 →O2−2 (3) NO →NO+ (4) N2 →N+2 JEE Main 2023 (13 Apr Shift 1) JEE Main Previous Year Paper

Q35. ClF5 at room temperature is a (1) Colourless liquid with trigonal (2) Colourless gas with square pyramidal geometry bipyramidal geometry (3) Colourless gas with trigonal bipyramidal (4) Colourless liquid with square pyramidal geometry geometry

Q35.Gibbs energy vs T plot for the formation of oxides is given below. For the given diagram, the correct statement is- (1) At 600°C, CO cannot reduce FeO (2) At 600°C, CO can reduce ZnO (3) At 600°C, C can reduce ZnO (4) At 600°C, C can reduce FeO

Q35.The setting time of Cement is increased by adding (1) Clay (2) Silica (3) Gypsum (4) Limestone

Q35.Given (A) 2COg + O2g →2CO2g ΔH1o = - x kJ mol-1 (B) Cgraphite + O2g →CO2g ΔH2o = - y kJ mol-1 1 The ∆Ho for the reaction Cgraphite + 2O2g →COg is (1) 2x - y (2) x + 2y 2 2 x - 2y (3) (4) 2y - x 2

Q35.But-2-yne is reacted separately with one mole of Hydrogen as shown below: Na Pd / C ← B CH3 - C ≡ C - CH3 →∆ A¯ ¯ liq NH3 +H2 Identify the incorrect statements from the options given below: A. A is more soluble than B. B. The boiling point & melting point of A are higher and lower than B respectively. C. A is more polar than B because dipole moment of A is zero. D. Br2 adds easily to B than A. (1) B and C only (2) B, C and D only (3) A, C and D only (4) A and B only

Q35.Lithium aluminium hydride can be prepared from the reaction of (1) LiCl and Al2H6 (2) LiH and Al2Cl6 (3) LiCl, Al and H2 (4) LiH and AlOH3

Q35.Arrange the following gases in increasing order of van der Waals constant ′a′ (A) Ar (B) CH4 (C) H2O (D) C6H6 Choose the correct option from the following. (1) D, C, B and A (2) B, C, D and A (3) C, D, B and A (4) A, B, C and D

Q35.Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : Isotopes of hydrogen have almost same chemical properties, but difference in their rates of reactions. Reason R: Isotopes of hydrogen have different enthalpy of bond dissociation. In the light of the above statements, choose the most appropriate answer from the options given below: (1) Both A and R are correct but R is NOT the (2) Both A and R are correct and R is the correct correct explanation of A explanation of A (3) A is not correct but R is correct (4) A is correct but R is not correct

Q35.Reaction of BeO with ammonia and hydrogen fluoride gives 'A' which on thermal decomposition gives BeF2 and NH4F. What is 'A' ? (1) H3NBeF3 (2) NH42BeF4 (3) NH4BeF3 (4) NH42Be2F6

Q35.Match items of column I and II Column I (Mixture of compounds) Column II (Separation Technique) A. H2O / CH2Cl2 i. Crystallization ii. Differential solvent extraction B. C. Kerosene/Naphthalene iii. Column chromatography D. C6H12O6 / NaCl iv. Fractional Distillation (1) A - ( iii ) , B - ( iv ) , C - ( ii ) , D - ( i ) (2) A - ( ii ) , B - ( iii ) , C - ( iv ) , D - ( i ) (3) A - ( i ) , B - ( iii ) , C - ( ii ) , D - ( iv ) (4) A - ( ii ) , B - ( iv ) , C - ( i ) , D - ( iii )

Q35.Match List-I with List-II: List-I Species List-II Geometry/Shape A. H3O+ I. Tetrahedral B. Acetylide anion II. Linear C. NH4+ III. Pyramidal D. ClO2- IV. Bent Choose the correct answer from the options given below: (1) A(III), B(IV), C(I), D(II) (2) A(III), B(I), C(II), D(IV) (3) A(III), B(II), C(I), D(IV) (4) A(III), B(IV), C(II), D(I)

Q36.For a good quality cement, the ratio of silica to alumina is found to be (1) 1. 5 (2) 4. 5 (3) 2 (4) 3

Q36.Choose the correct set of reagents for the following conversion transPh - CH = CH - CH3 → cis Ph - CH = CH - CH3 (1) Br2, alc KOH, NaNH2, NaLiqNH3 (2) Br2, alc KOH, NaNH2, H2 Lindlar Catalyst (3) Br2, aqKOH, NaNH2, H2 Lindlar Catalyst (4) Br2, aq KOH, NaNH2, NaLiqNH3