JEE (Advance), 2015 - Chemistry @jeeadv2015chem - Tumblr Blog

Question on Hydrocarbons

In the following reactions

Compound X is

Compound Y is

#Comprehension Type #Organic Chemistry #Hydrocarbons #Paper 2

Question on Thermochemistry & ionic Equilibrium

When 100 mL of 1.0 M HCl was mixed with 100 mL of 1.0 M NaOH in an insulated beaker at constant pressure, a temperature increase of \(5.7^oC\) was measured for the beaker and its contents (Expt. 1). Because the enthalpy of neutralization of a strong acid with a strong base is a constant (\(- 57 kJ mol^{-1}\)), this experiment could be used to measure the calorimeter constant. In a second experiment (Expt. 2), 100 mL of 2.0 M acetic acid (\(K_a = 2.0 \times 10^{-5}\)) was mixed with 100 mL of 1.0 M NaOH (under identical conditions to Expt. 1) where a temperature rise of \(5.6^oC\) was measured. (Consider heat capacity of all solutions as \(4.2 J g^{-1} K^{-1}\) and density of all solutions as \(1.0 g mL^{-1}\))

Enthalpy of dissociation (\(in \ kJ mol^{-1}\)) of acetic acid obtained from Expt. 2 is A) 1.0 B) 10.0 C) 24.5 D) 51.4

The pH of the solution after Expt. 2 is A) 2.8 B) 4.7 C) 5.0 D) 7.0

#Comprehension Type #Physical Chemistry #Thermochemistry #Ionic Equilibrium #Paper 2

Question on Carbonyl Compounds

In the following reaction, the product S is

#One or More Correct Type #Organic Chemistry #Carbonyl Compounds #Paper 2

Question on Gaseous State

One mole of a monoatomic real gas satisfies the equation P(V - b) = RT where b is a constant. The relationship of interatomic potential \(V_(r)\) and interatomic distance r for the gas is given by

A)

B)

C)

D)

#One or More Correct Type #Physical Chemistry #Gaseous State #Paper 2

Question on Adsorption

When \(O_2\) is adsorbed on a metallic surface, electron transfer occurs from metal to \(O_2\). The TRUE statement(s) regarding this adsorption is (are) A) \(O_2\) is physisorbed B) Heat is released C) Occupancy of \(\pi_{2p}^*\) of \(O_2\) is increased D) bond length of \(O_2\) is increased

#One or More Correct Type #Physical Chemistry #Surface Chemistry #Paper 2

Question on Silicones

Under hydrolytic conditions, the compounds used for preparation of linear polymer and for chain termination respectively, are A) CH3SiCl3 and Si(CH3)4 B) (CH3)2SiCl2 and (CH3)3SiCl C) (CH3)2SiCl2 and CH3SiCl3 D) SiCl4 and (CH3)3SiCl

#One or More Correct Type #Inorganic Chemistry #Silicones #Paper 2

Question on Qualitative Analysis

The pair(s) of ions where BOTH the ions are precipitated upon passing H2S gas in presence of dilute HCl, is (are) A) Ba2+, Zn2+ B) Bi3+, Fe3+ C) Cu2+, Pb2+ D) Hg2+, Bi3+

#One or More Correct Type #Inorganic Chemistry #Qualitative Analysis #Paper 2

Question on Halogen Compounds

The correct statement(s) regarding, (i) HClO, (ii) HClO2, (iii) HClO3 and (iv) HClO4 is (are) A) The number of Cl = O bonds is (ii) and (iii) together is two B) The number of lone pairs of electrons on Cl in (ii) and (iii) together is three C) The hybridization of Cl in (iv) is sp3 D) Amongst (i) to (iv), the strongest acid is (i)

#One or More Correct Type #Inorganic Chemistry #Halogen Compounds #Paper 2

Question on Amino Compounds

In the following reaction, the major product W is

#One or More Correct Type #Organic Chemistry #Amines #Paper 2

Question on Phenols

The major product U in the following reaction is

#One or More Correct Type #Organic Chemistry #Phenol #Paper 2

Question on Coordination Compounds

Among the complex ions, \([Co(NH_2CH_2CH_2NH_2)_2Cl_2]^+\), \([CrCl_2(C_2O_4)_2]^{3-}\), \([Fe(H_2O)_4(OH)_2]^+\), \([Fe(NH_3)_2(CN)_4]^-\), \([Co(NH_2CH_2NH_2)_2(NH_3)Cl]^{2+}\) and \([Co(NH_3)_4(H_2O)Cl]^{2+}\), the number of complex ion(s) that show(s) cis-trans isomerism is

#Single Digit Integer Type #Inorganic Chemistry #Coordination Compounds #Paper 2

Question on Coordination Compounds

In the complex acetylbromidodicarbonylbis(triethylphosphine)iron(II), the number of Fe – C bond(s) is

#Single Digit Integer Type #Inorganic Chemistry #Coordination Compounds #Paper 2

Question on Carbonyl Compounds

Among the following, the number of reaction(s) that produce(s) benzaldehyde is

#Single Digit Integer Type #Organic Chemistry #Carbonyl Compounds #Paper 2

Question on Hydrocarbons

The number of hydroxyl group(s) in Q is

#Single Digit Integer Type #Organic Chemistry #Hydrocarbons #Paper 2

Question on Chemical Kinetics

In dilute aqueous \(H_2SO_4\), the complex diaquodioxalatoferrate(II) is oxidized by \(MnO^-_4\). For this reaction, the rate of the change of \(H^+\) to the rate of change of \(MnO^-_4\) is

#Single Digit Integer Type #Physical Chemistry #Chemical Kinetics #Paper 2

A closed vessel with rigid walls contains 1 mol of 92U238 and 1 mol of air at 298 K. Considering complete decay of 92U238 to 82Pb206, the ratio of the final pressure to the initial pressure of the system at 298 K is

#Single Digit Integer Type #Physical Chemistry #Radioactivity #Paper 2

Question on Molar Conductivity

The molar conductivity of a solution of a weak acid HX (0.01 M) is 10 times smaller than the molar conductivity of a solution of a weak acid HY (0.10 M). If \(\lambda_{H^-}^o \approx \lambda_{Y^-}^o\), the difference in their \(pK_a\) values, \(pK_a (HX)\) – \(pK_a (HY)\) is (consider degree of ionization of both acids be << 1)

#Single Digit Integer Type #Physical Chemistry #Conductance #Paper 2

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JEE (Advance), 2015 - Chemistry