Practice Questions

Q36.Choose the correct order of density of the alkali metals (1) Li < K < Na < Rb < Cs (2) Li < Na < K < Rb < Cs (3) Li < Na < K < Cs < Rb (4) Cs < Rb < K < Na < Li

Q36.The number of bridged oxygen atoms present in compound B formed from the following reactions is 673 K PbNO32 ⟶ A + PbO + O2 Dimerise A ⟶ B (1) 0 (2) 1 (3) 2 (4) 3

Q36.The products obtained during treatment of hard water using Clark's method are (1) CaCO3 and MgCO3 (2) Ca (OH)2 and Mg (OH)2 (3) CaCO3 and Mg (OH)2 (4) Ca (OH)2 and MgCO3

Q36.The correct order of density is (1) Be > Mg > Ca > Sr (2) Sr > Ca > Mg > Be (3) Sr > Be > Mg > Ca (4) Be > Sr > Mg > Ca

Q36.Identify the correct statement for B2H6 from those given below. (A) In B2H6 , all B −H bonds are equivalent. (B) In B2H6 , there are four 3-centre- 2-electron bonds. (C) B2H6 is a Lewis acid. (D) B2H6 can be synthesized from both BF3 and NaBH4 . (E) B2H6 is a planar molecule. Choose the most appropriate answer from the options given below : (1) (A) and (E) only (2) (B), (C) and (E) only (3) (C) and (D) only (4) (C) and (E) only

Q36.Which one of the following compounds is used as a chemical in certain type of fire extinguishers (1) Washing soda (2) Baking soda (3) Caustic soda (4) Soda ash

Q36.The incorrect statement about the imperfections in solids is (1) Schottky defect decreases the density of the (2) Frenkel defect does not alter the density of the substance. substance. (3) Interstitial defect increases the density of the (4) Vacancy defect increases the density of the substance. substance.

Q36.What will be the major product of following sequence of reactions? (1) (2) (3) (4)

Q36.Which one of the following reactions indicates the reducing ability of hydrogen peroxide in basic medium? (1) HOCl + H2O2 →H3O+ + Cl−+ O2 (2) PbS + 4H2O2 →PbSO4 + 4H2O (3) 2 MnO−4 + 3H2O2 →2 MnO2 + 3O2 + 2H2O +(4)2 OH−Mn2+ + H2O2 →Mn4+ + 2 OH−

Q36.Lithium nitrate and sodium nitrate, when heated separately, respectively, give (1) LiNO2 and NaNO2 (2) Li2 O and Na2 O (3) Li2 O and NaNO2 (4) LiNO2 and Na2 O JEE Main 2022 (29 Jul Shift 1) JEE Main Previous Year Paper

Q36.Given below are two statements: Statement I : Hydrogen peroxide can act as an oxidizing agent in both acidic and basic conditions. Statement II: Density of hydrogen peroxide at 298 K is lower than that of D2O. In the light of the above statements. Choose the correct answer from the options. (1) Both statement I and Statement II are ture (2) Both statement I and Statement II are false (3) Statement I is true but Statement II is false (4) Statement I is false but Statement II is true

Q36.Match List - I with List - II. List-I List-II ( Si-Compounds) ( Si-Polymeric/Other Products) A (CH3)4 Si I Chain Silicone B (CH3) Si (OH)3 II Dimeric Silicone C (CH3)2 Si (OH)2 III Silane JEE Main 2022 (27 Jun Shift 1) JEE Main Previous Year Paper D (CH3)3 Si(OH) IV 2 D- Silicone Choose the correct answer from the options given below (1) (A) −(III), (B) −(II), (C) −(I), (D) −(IV) (2) (A) −(IV), (B) −(I), (C) −(II), (D) −(III) (3) (A) −(II), (B) −(I), (C) −(IV), (D) −(III) (4) (A) −(III), (B) −(IV), (C) −(I), (D) −(II)

Q36.Hydrogen has three isotopes : protium (1H) , deuterium ( 2H or D ) and tritium ( 3H or T). They have nearly same chemical properties but different physical properties. They differ in (1) Number of protons (2) Atomic number (3) Electronic configuration (4) Atomic mass

Q36.Given below are two statements. Statement I : Stannane is an example of a molecular hydride. Statement II : Stannane is a planar molecule. In the light of the above statement, choose the most appropriate answer from the options given below (1) Both Statement I and Statement II are true. (2) Both Statement I and Statement II are false. (3) Statement I is true but Statement II is false. (4) Statement I is false but Statement II is true.

Q36.In the following structures, which one is having staggered conformation with maximum dihedral angle? (1) (2) (3) (4)

Q36.Borazine, also known as inorganic benzene, can be prepared by the reaction of 3-equivalents of " X" with 6- equivalents of " Y". " X" and " Y", respectively are (1) B(OH)3 and NH3 (2) B2H6 and NH3 (3) B2H6 and HN3 (4) NH3 and B2O3

Q37.Which will have the highest enol content? JEE Main 2022 (26 Jun Shift 1) JEE Main Previous Year Paper (1) (2) (3) (4)

Q37.The IUPAC name of ethylidene chloride is (1) 1 - chloroethene (2) 1, 2-dichloroethane (3) 1, 1-dichloroethane (4) 1-chloroethyne

Q37.Among the following, basic oxide is (1) SO3 (2) SiO2 (3) CaO (4) Al2 O3

Q37.Match List - I with List - II List-II List-II A N2g + 3H2g →2NH3g I Cu B COg + 3H2g →CH4g + H2Og II Cu / ZnO - Cr2O3 C COg + H2g →HCHOg III Fe𝑥O𝑦+ K2O + Al2O3 D COg + 2H2g →CH3OHg IV Ni Choose the correct answer from the options given below (1) A - II, B - IV, C - I, D - III (2) A - II, B - I, C - IV, D - III (3) A - III, B - IV, C - I, D - II (4) A - III, B - I, C - IV, D - II

Q37.The Zeta potential is related to which property of colloids? (1) Colour (2) Brownian movement (3) Charge on surface of colloidal particle (4) Tyndall effect

Q37.Which of the following is an example of conjugated diketone? (1) (2) (3) (4)

Q37.The correct order of nucleophilicity is (1) F−> OH− (2) H2 ¨O > OH− (3) ROH > RO− (4) NH−2 > NH3

Q37.Given below are two statements: Statement I : The chlorides of Be and Al have Cl-bridged structure. Both are soluble in organic solvents and act as Lewis bases. Statement II: Hydroxides of Be and Al dissolve in excess alkali to give beryllate and aluminate ions. In the light of the above statements. Choose the correct answer from the options given below. JEE Main 2022 (27 Jul Shift 1) JEE Main Previous Year Paper (1) Both statement I and Statement II are true (2) Both statement I and Statement II are false (3) Statement I is true but Statement II is false (4) Statement I is false but Statement II is true

Q37.Which among the following pairs of the structures will give different products on ozonolysis? (Consider the double bonds in the structures are rigid and not delocalized.) (1) (2) (3) (4)