Practice Questions

Q38.The hydride that is NOT electron deficient is: (1) SiH4 (2) B2H6 (3) GaH3 (4) AlH3

Q38.The incorrect statement is: (1) LiNO3 decomposes on heating to give LiNO2 (2) LiCl crystallises from aqueous solution as and O2. LiCl −2H2O . (3) Lithium is the strongest reducing agent among (4) Lithium is least reactive with water among the the alkali metals. alkali metals.

Q39.The alkaline earth metal nitrate that does not crystallise with molecules is: (1) 𝐵𝑎𝑁𝑂32 (2) 𝑆𝑟𝑁𝑂32 (3) 𝑀𝑔𝑁𝑂32 (4) 𝐶𝑎𝑁𝑂32

Q39.If Ksp of Ag2 CO3 is 8 × 10−12 , the molar solubility of Ag2 CO3 in 0 .1 M AgNO3 is: (1) 8 x 10−13M (2) 8 x 10−11M (3) 8 x 10−12M (4) 8 x 10−10M

Q39.What is the hardness of a water sample (in terms of equivalents of CaCO3) containing 10−3M CaSO4 ? (Molar mass of CaSO4 = 136 g mol−1) (1) 90 ppm (2) 50 ppm (3) 10 ppm (4) 100 ppm

Q39.The correct order of hydration enthalpies of alkali metal ions is: (1) Na+ > Li+ > K+ > Rb+(2)>Na+Cs+> Li+ > K+ > Cs+(3)>Li+Rb+> Na+ > K+ > Rb+(4)>Li+Cs+> Na+ > K+ > Cs+ > Rb+

Q39.What will be the major product in the following mononitration reaction? (1) (2) (3) (4)

Q39.A hydrated solid X on heating initially gives a monohydrated compound Y. Y upon heating above 373 K leads to an anhydrous white powder Z. X and Z, respectively, are; (1) washing soda and soda ash. (2) baking soda and soda ash. (3) washing soda and dead burnt plaster. (4) baking soda and dead burnt plaster.

Q39.The C −C bond length is maximum in: (1) C70 (2) C60 (3) graphite (4) diamond

Q39.The correct IUPAC name of the following compound is: (1) 5−chloro −4−methyl −1−nitrobenzene. (2) 2−chloro −1−methyl −4−nitrobenzene. (3) 2−methyl −5−nitro −1−chlorobenzene. (4) 3−chloro −4−methyl −1−nitrobenzene.

Q40. Which compound (s) out of the following is/are not aromatic? (A) (B) (C) (D) JEE Main 2019 (11 Jan Shift 1) JEE Main Previous Year Paper (1) (B), (C) and (D) (2) (C) and (D) (3) (B) (4) (A) and (C)

Q40.The increasing order of reactivity of the following compounds towards aromatic electrophilic substitution reaction is: (1) A < B < C < D (2) B < C < A < D (3) D < B < A < C (4) D < A < C < B

Q40.A metal on combustion in excess air forms X . X upon hydrolysis with water yields H2O2 and O2 along with another product. The metal is: (1) Na (2) Mg (3) Li (4) Rb

Q40.The correct sequence of thermal stability of the following carbonates is: (1) BaCO3 < CaCO3 < SrCO3 < MgCO3 (2) MgCO3 < CaCO3 < SrCO3 < BaCO3 (3) BaCO3 < SrCO3 < CaCO3 < MgCO3 (4) MgCO3 < SrCO3 < CaCO3 < BaCO3

Q40.The reaction that is not involved in the ozone layer depletion mechanism in the stratosphere is ∙ ∙ (1) CH4 + 2O2 →CO2 + 2H2O (2) Cl O (g) + O (g) → Cl (g) + O2 (g) uv ∙ ∙ h(nu) ∙ ∙ (3) (4)−−CF2 Cl2 (g) → Cl (g) + CF2 Cl (g) HOCl (g) → OH (g) + Cl (g)

Q40.Which of the following compounds reacts with ethylmagnesium bromide and also decolourizes bromine water solution? JEE Main 2019 (11 Jan Shift 2) JEE Main Previous Year Paper (1) (2) (3) (4)

Q40.Which of the following compounds will show the maximum 'enol' content? (1) CH3COCH2CONH2 (2) CH3COCH2COCH3 (3) CH3COCH2COOC2H5 (4) CH3COCH3

Q40.The IUPAC name for the following compound is: JEE Main 2019 (12 Apr Shift 2) JEE Main Previous Year Paper (1) 3−methyl −4−1−( methylprop −2−ynyl) −1−heptene (2) 3, 5−dimethyl −4−propylhept −6−en −1−yne (3) 3, 5−dimethyl −4−propyl hept −1−en −6−yne (4) 3−methyl −4−3−( methylprop −1−enhyl) −1−heptyne

Q41.The increasing order of nucleophilicity of the following nucleophiles is; (1) ( i ) < ( iv ) < ( iii ) < ( ii ) (2) ( ii ) < ( iii ) < ( iv ) < ( i ) (3) iv < i < iii < ii (4) ( ii ) < ( iii ) < ( i ) < ( iv )

Q41.The major product of the following reaction is: (1) (2) (3) (4)

Q41.The correct match between items I and II is : (1) (A) →(S); (B) →(R); (C) →(P) (2) (A) →(Q); (B) →(R); (C) →(S) (3) (A) → (R); (B) → (P); (C) → (S) (4) (A) →(Q); (B) →(R); (C) →(P)

Q41.Arrange the following amines in the decreasing order of basicity. (1) III > I > II (2) I > III > II (3) III > II > I (4) I > II > III

Q41.The increasing order of the pKa values of the following compounds is: (1) B < C < A < D (2) D < A < C < B (3) B < C < D < A (4) C < B < A < D

Q41.At 100oC, copper (Cu) has FCC unit cell structure with cell edge length of x Å . What is the approximate density of Cu (in g cm−3 ) at this temperature? [Atomic Mass of Cu = 63.55 u] (1) 105 (2) 205 x3 x3 (3) 422 (4) 211 x3 x3

Q41.Among the following four aromatic compounds, which one will have the lowest melting point? (1) (2) (3) (4)