Practice Questions

Q53.A solution containing a period −IV cation gives a precipitate on passing H2S. A solution of this precipitate in dil. HCl produces a white precipitate with NaOH solution and bluish-white precipitate with basic potassium ferrocyanide. The cation is (1) Mn2+ (2) Zn2+ (3) Ni2+ (4) CO2+ JEE Main 2017 (08 Apr Online) JEE Main Previous Year Paper

Q53.The correct sequence of decreasing number of π -bonds in the structure of H2SO3, H2SO4 and H2S2O7 is: (1) H2S2O7 > H2SO3 > H2SO4 (2) H2S2O7 > H2SO4 > H2SO3 (3) H2SO4 > H2S2O7 > H2SO3 (4) H2SO3 > H2SO4 > H2S2O7

Q54.The major product of the following reaction is: (1) CH3 CH = CH −CH = CHCH3 (2) CH2 = CHCH = CHCH2 CH3 (3) CH3 CH = C = CHCH2 CH3 (4) CH2 = CHCH2 CH = CHCH3

Q54. XeF6 on partial hydrolysis with water, produces a compound X. The same compound X is formed when XeF6 reacts with silica. The compound X is: (1) XeF4 (2) XeF2 (3) XeO3 (4) XeOF4 Q55. [Co2 (CO)8] displays (1) no Co −Co bonds, six terminal CO and two (2) no Co −Co bonds, four terminal CO and four bridging CO. bridging CO. (3) one Co −Co bonds, six terminal CO and two (4) one Co −Co bonds, four terminal CO and four bridging CO. bridging CO.

Q54.The increasing order of the reactivity of the following halides for the SN1 reaction is (1) ( II ) < ( I ) < ( III ) (2) ( I ) < ( III ) < ( II ) (3) ( II ) < ( III ) < ( I ) (4) ( III ) < ( II ) < ( I ) Q55.3 - Methyl - pent-2 - ene on reaction with HBr in presence of peroxide forms an addition product. The number of possible stereoisomers for the product is (1) zero (2) two (3) four (4) six

Q56.Which of the following, upon treatment with tert-BuONa followed by addition of bromine water, fails to decolourize the colour of bromine? (1) (2) (3) (4)

Q56.In the following reaction sequence: JEE Main 2017 (09 Apr Online) JEE Main Previous Year Paper Compound I is (1) (2) (3) (4)

Q56.The major product of the following reaction is: (1) (2) (3) (4) JEE Main 2017 (08 Apr Online) JEE Main Previous Year Paper

Q57.A compound of molecular formula C8H8O2 reacts with acetophenone to form a single cross-aldol product in the presence of base. The same compound on reaction with concentrated NaOH forms benzyl alcohol as one of the products. The structure of the compound is: (1) (2) (3) (4)

Q57.The correct sequence of reagents for the following conversion will be JEE Main 2017 (02 Apr) JEE Main Previous Year Paper (1) CH3MgBr, H+ / CH3OH, AgNH32 +OH- (2) CH3MgBr, AgNH32 +OH- , H+ / CH3OH (3) AgNH32 +OH-, CH3MgBr, H+ / CH3OH (4) AgNH32 +OH-, H+ / CH3OH, CH3MgBr

Q57.The major product expected from the following reaction is: (1) (2) (3) (4)

Q58.A mixture containing the following four compounds is extracted with 1 M HCl. The compound that goes to aqueous layer is: (1) IV (2) II (3) I (4) III

Q58.The major product obtained in the following reaction is (1) (2) (3) (4)

Q59.The formation of which of the following polymers involves hydrolysis reaction? (1) Bakelite (2) Nylon- 6,6 (3) Terylene (4) Nylon-6

Q59.Which of the following is a biodegradable polymer? JEE Main 2017 (09 Apr Online) JEE Main Previous Year Paper (1) (2) (3) (4)

Q60.Which of the following compounds will behave as reducing sugar in an aqueous KOH solution? (1) (2) (3) (4)

Q61.The sum of all the real values of x Satisfying the equation 2(x−1)(x2+5x−50) = 1 is: (1) 16 (2) −5 (3) −4 (4) 14

Q61.Let p(x) be a quadratic polynomial such that p(0) = 1. If p(x) leaves remainder 4 when divided by x −1 and it leaves remainder 6 when divided by x + 1 then: (1) p(−2) = 19 (2) p(2) = 19 (3) p(−2) = 11 (4) p(2) = 11

Q62.The equation Im( iz−2z−i ) + 1 = 0, z ∈C, z ≠i represents a part of a circle having radius equal to : (1) 1 (2) 2 (3) 3 (4) 1 4 2

Q62.Let z ∈C, the set of complex numbers. Then the equation, 2|z + 3i| −|z −i| = 0 represents: (1) A circle with radius 8 (2) An ellipse with length of minor axis 16 3 9 (3) An ellipse with length of major axis 16 (4) A circle with diameter 10 3 3

Q62.Let 𝜔 be a complex number such that 2𝜔+ 1 = 𝑧 where 𝑧= √-3 . If 1 1 1 1 -𝜔2 - 1 𝜔2 = 3𝑘, 1 𝜔2 𝜔7 Then 𝑘 can be equal to: (1) – 𝑧 (2) 1 𝑧 (3) -1 (4) 1

Q63.A man 𝑋 has 7 friends, 4 of them are ladies and 3 are men. His wife 𝑌 also has 7 friends, 3 of them are ladies and 4 are men. Assume 𝑋 and 𝑌 have no common friends. Then the total number of ways in which 𝑋 and 𝑌 together can throw a party inviting 3 ladies and 3 men, so that 3 friends of each of 𝑋 and 𝑌 are in this party is: (1) 485 (2) 468 (3) 469 (4) 484

Q63.If all the words, with or without meaning, are written using the letters of the word QUEEN and are arranged as in English dictionary, then the position of the word QUEEN is: (1) 47th (2) 45th (3) 46th (4) 44th

Q63.The number of ways in which 5 boys and 3 girls can be seated on a round table if a particular boy B1 and a particular girl G1 never sit adjacent to each other, is: (1) 7! (2) 5 × 6! (3) 6 × 6! (4) 5 × 7!

Q64.If the arithmetic mean of two numbers a and b, a > b > 0 , is five times their geometric mean, then a+ba−b is equal to: (1) 7√3 (2) 3√2 12 4 (3) √6 (4) 5√6 2 12