CHEMISTRY
1.For a melting of a solid at 250C, the fusion process requires energy equivalent to 2906 J to be added to system considering the process to be reversible at fusion point, the entropy change for the process is a) 9.75 J K−1 b) 11.272 J K−1 c) 2.33 J K−1 d) Insufficient data 2.The reaction is spontaneous, if the cell potential is a) positiveb) negative c) zero d) infinity 3.1 mole of an ideal gas 300 K is expanded isothermally from an initial volume of 1L to 10 L. The ΔE for this process is (R=2 cal.K−1mol−1) a) 163.7 cal b) 1381.1 cal c) 9 lit atmd) zero 4.S+32O2→SO3+2xkcal...(1) SO 2 + 1 2 O 2 → SO 3 + y kcal ..... ( 2 ) Find out the heat of formation of SO2 a) 2x−y b) 2x+y c) x+y d) 2xy 5.Enthalpy of reaction ΔHis represented as a) ΔH=ΣHP−ΣHRb) ΔH=dHP+dHRc) ΔH=dHpdHR d) ΔH=ΣHPdHR 6.For a reaction to occur spontaneously a) (ΔH−TΔS) must be negative b) (ΔH+TΔS)mustbenegative c) ΔHmust be negative d) ΔSmust be negative 7.In general, for exothermic reactions to be spontaneous a) temperature should be high b) temperature should be zero c) temperature should be low d) temperature has no effect 8.If the enthalpy of vapourisation of water is 186.5 J mol−1,the entropy of its vapourisation will be a) 0.5JK−1mol−1 b) 1.0JK−1mol−1 c) 1.5 JK−1mol−1 d) 2.0 JK−1mol−1 9.All the naturally occuring processes proceed spontaneously in a direction which leads to a) Decrease of entropy b) Increase of Enthalpy c) Increase of free energy d) Decrease of free energy 10.The heat of formation of COand CO2are -26.4 kcal and -94 kcal respectively. Heat of combustion of CO will be
a) 26.4 kcal b) -67.6 kcal c) -120.6 kcal d) +52.8 11.In which of the following neutralisation reaction, the heat of neutralisation will be highest. a) NH4OHand H2SO4 b) HCland NaOH c) CH3COOHand KOH d) CH3COOHand NH4OH 12.Heat of neutralisation of strong acid against strong base is constant and is equal to a) -13.7 kcal b) -57 kJ c) −5.7×104J d) all of the above 13.The number of atoms in 100g of an FCC crystel with density d=10g/cm3and cell edge as 200 pm is equal to a) 31025 b) 51024 c) 11025 d) 21025 14.For the reaction H2Cl2sunlight2HCl taking place on water, the order of reation is a) 0 b) 1 c) 2 d) 3 15.In which of the following species is the underlined carbon having sp3hybridisation a) CH3 COOH b) CH3CH2OH c) CH3COCH3 d) CH2CHCH3 16.The high density of water compound to ice is due to a) dipole dipole interaction b) hydrogen bonding interaction c) dipole induced dipole interactiond) none of the above 17.The molecular species having highest bond order is a) O2 b) O2 c) O2 d) O22 18.NH3and BF3form adduct readily because they form a) Ionic bond b) Covalent bond c) Co-ordinate bond d) Hydrogen bond 19.Which of the following is electron deficient? a) BCl3 b) PCl3 c) PCl5 d) NH3 20.Which of the following compounds has 0? a) CCl4 b) CHCl3 c) HF d) NH3 21.The lustre of the metal is on account of a) high density of metals b) high polish of metals c) reflection of light due to the presence of free electrons d) chemical inertness of metals 22.The hybrid states of carbon in diamond, graphite, and acetylene are respectibvely. a) sp2spsp3 b) spsp2sp3 c) sp3sp2sp d) sp2sp3sp
23.In a homonuclear molecule which of the following set of orbitals are degenerate? a) 2s1s b) 2px2py c) 2px2pz d) 2pz, 2px 24.The correct order of decreasing polarisability of ions is a) ClBrIF b) FIBrCl c) FClBrI d) IBrClF 25.The maximum extent of H bonding is shown by a) H2O b) H2Se c) H2S d) HF 26.Which of the following does not apply to bonding in metals a) Non directional bonds b) Mobility of valence electrons c) Delocalisation of electrons d) Highly directed bonds 27.The pyramidal geomatry is associated with a) CH4 b) NH3 c) H2O d) CO2 28.The H-O-H angle in water molecules is a) 900 b) 1800 c) 1050 d) 750 29.A sp3hybrid orbital contains a) 14scharacter b) 12scharacter c) 32scharacter d) 23scharacter 30.Which of the following bonds has most polar character? a) C-O b) C-Br c) C-F d) C-S 31.Covalent compounds are soluble in a) Polar solvents b) Non-polar solvents c) Concentrated acids d) All solvents 32.Element X is strongly electropositive and element Y is strongly electronegative. Both are univalent. The compound formed would be a) XY b) XY c) X-Y d) XY 33.Among the 2nd group elements, the metal forming predominently covalent compund is a) Be b) Mg c) Sr d) Ca 34.Methanol and Ethanol are miscible in water due to a) Co-valent character b) Hydrogen bonding character c) Oxygen bonding character d) None of the above 35.Which of the following molecules does not have a dipole moment? a) ClO2 b) CO2 c) NO2 d) SO2 36.Which is true about the electronegativity order of the following?
a) P>S b) C >N c) Br >Cl d) Sr >Ca 37.Eka-aluminium and Eka-silicon are known as a) Gallium & Germanium b) Al & Si c) Fe & S d) Proton & Silicon 38.In the modern periodic table, elements are arranged in the increasing order of a) Atomic mass b) Atomic number c) Mass number d) Isotopic number 39.Which of the following has the maximum electron affinity? a) F b) S c) I d) Cl 40.The correct sequence of elements in the decreasing order of first IE is a) Na>Mg>Al>Si b) Mg>Na>Al>Si c) Al>Mg>Na>Si d) Si>Mg>Al>Na 41.The ionic radius of N3O2FNafollows the order a) N3>O2>F>Na b) N3>Na>O2>F c) Na>O2>N3>F d) Na>F>O2>N3 42.Alkali metal in each period have a) smallest size b) lowest IE c) highest IE d) highest electro negtivity 43.Which of the following is not isoelectronic with O2 a) N3 b) Na c) F d) Ti 44.The element with Z=26 will be found in group a) 2 b) 8 c) 6 d) 10 45.The valancy of noble gases, in general is a) 0 b) 1 c) 3 d) 2 46.The oxide of which of the following will be acidic a) Mg b) Rb c) Li d) Cl 47.Which of the following decreases in going down the halogen group? a) Ionic Radiaus b) Atomic radius c) IE d) Boiling point 48.Which of the following requires radiation of highest frequency to cause emission of electron? a) Na b) Mg c) K d) Ca 49.Which of the following is associated with biggest jump between 2nd and 3rd IE?
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a) 1s22s22p2 b) 1s22s22p63s1 c) 1s22s22p63s2 d) 1s22s22p1 50.Among the following which one will have highest electron affinity? a) 1s1 b) 1s22s1 c) 1s22s22p4 d) 1s22s22p5
1.For a melting of a solid at 250C, the fusion process requires energy equivalent to 2906 J to be added to system considering the process to be reversible at fusion point, the entropy change for the process is a) 9.75 J K−1 b) 11.272 J K−1 c) 2.33 J K−1 d) Insufficient data 2.The reaction is spontaneous, if the cell potential is a) positiveb) negative c) zero d) infinity 3.1 mole of an ideal gas 300 K is expanded isothermally from an initial volume of 1L to 10 L. The ΔE for this process is (R=2 cal.K−1mol−1) a) 163.7 cal b) 1381.1 cal c) 9 lit atmd) zero 4.S+32O2→SO3+2xkcal...(1) SO 2 + 1 2 O 2 → SO 3 + y kcal ..... ( 2 ) Find out the heat of formation of SO2 a) 2x−y b) 2x+y c) x+y d) 2xy 5.Enthalpy of reaction ΔHis represented as a) ΔH=ΣHP−ΣHRb) ΔH=dHP+dHRc) ΔH=dHpdHR d) ΔH=ΣHPdHR 6.For a reaction to occur spontaneously a) (ΔH−TΔS) must be negative b) (ΔH+TΔS)mustbenegative c) ΔHmust be negative d) ΔSmust be negative 7.In general, for exothermic reactions to be spontaneous a) temperature should be high b) temperature should be zero c) temperature should be low d) temperature has no effect 8.If the enthalpy of vapourisation of water is 186.5 J mol−1,the entropy of its vapourisation will be a) 0.5JK−1mol−1 b) 1.0JK−1mol−1 c) 1.5 JK−1mol−1 d) 2.0 JK−1mol−1 9.All the naturally occuring processes proceed spontaneously in a direction which leads to a) Decrease of entropy b) Increase of Enthalpy c) Increase of free energy d) Decrease of free energy 10.The heat of formation of COand CO2are -26.4 kcal and -94 kcal respectively. Heat of combustion of CO will be
a) 26.4 kcal b) -67.6 kcal c) -120.6 kcal d) +52.8 11.In which of the following neutralisation reaction, the heat of neutralisation will be highest. a) NH4OHand H2SO4 b) HCland NaOH c) CH3COOHand KOH d) CH3COOHand NH4OH 12.Heat of neutralisation of strong acid against strong base is constant and is equal to a) -13.7 kcal b) -57 kJ c) −5.7×104J d) all of the above 13.The number of atoms in 100g of an FCC crystel with density d=10g/cm3and cell edge as 200 pm is equal to a) 31025 b) 51024 c) 11025 d) 21025 14.For the reaction H2Cl2sunlight2HCl taking place on water, the order of reation is a) 0 b) 1 c) 2 d) 3 15.In which of the following species is the underlined carbon having sp3hybridisation a) CH3 COOH b) CH3CH2OH c) CH3COCH3 d) CH2CHCH3 16.The high density of water compound to ice is due to a) dipole dipole interaction b) hydrogen bonding interaction c) dipole induced dipole interactiond) none of the above 17.The molecular species having highest bond order is a) O2 b) O2 c) O2 d) O22 18.NH3and BF3form adduct readily because they form a) Ionic bond b) Covalent bond c) Co-ordinate bond d) Hydrogen bond 19.Which of the following is electron deficient? a) BCl3 b) PCl3 c) PCl5 d) NH3 20.Which of the following compounds has 0? a) CCl4 b) CHCl3 c) HF d) NH3 21.The lustre of the metal is on account of a) high density of metals b) high polish of metals c) reflection of light due to the presence of free electrons d) chemical inertness of metals 22.The hybrid states of carbon in diamond, graphite, and acetylene are respectibvely. a) sp2spsp3 b) spsp2sp3 c) sp3sp2sp d) sp2sp3sp
23.In a homonuclear molecule which of the following set of orbitals are degenerate? a) 2s1s b) 2px2py c) 2px2pz d) 2pz, 2px 24.The correct order of decreasing polarisability of ions is a) ClBrIF b) FIBrCl c) FClBrI d) IBrClF 25.The maximum extent of H bonding is shown by a) H2O b) H2Se c) H2S d) HF 26.Which of the following does not apply to bonding in metals a) Non directional bonds b) Mobility of valence electrons c) Delocalisation of electrons d) Highly directed bonds 27.The pyramidal geomatry is associated with a) CH4 b) NH3 c) H2O d) CO2 28.The H-O-H angle in water molecules is a) 900 b) 1800 c) 1050 d) 750 29.A sp3hybrid orbital contains a) 14scharacter b) 12scharacter c) 32scharacter d) 23scharacter 30.Which of the following bonds has most polar character? a) C-O b) C-Br c) C-F d) C-S 31.Covalent compounds are soluble in a) Polar solvents b) Non-polar solvents c) Concentrated acids d) All solvents 32.Element X is strongly electropositive and element Y is strongly electronegative. Both are univalent. The compound formed would be a) XY b) XY c) X-Y d) XY 33.Among the 2nd group elements, the metal forming predominently covalent compund is a) Be b) Mg c) Sr d) Ca 34.Methanol and Ethanol are miscible in water due to a) Co-valent character b) Hydrogen bonding character c) Oxygen bonding character d) None of the above 35.Which of the following molecules does not have a dipole moment? a) ClO2 b) CO2 c) NO2 d) SO2 36.Which is true about the electronegativity order of the following?
a) P>S b) C >N c) Br >Cl d) Sr >Ca 37.Eka-aluminium and Eka-silicon are known as a) Gallium & Germanium b) Al & Si c) Fe & S d) Proton & Silicon 38.In the modern periodic table, elements are arranged in the increasing order of a) Atomic mass b) Atomic number c) Mass number d) Isotopic number 39.Which of the following has the maximum electron affinity? a) F b) S c) I d) Cl 40.The correct sequence of elements in the decreasing order of first IE is a) Na>Mg>Al>Si b) Mg>Na>Al>Si c) Al>Mg>Na>Si d) Si>Mg>Al>Na 41.The ionic radius of N3O2FNafollows the order a) N3>O2>F>Na b) N3>Na>O2>F c) Na>O2>N3>F d) Na>F>O2>N3 42.Alkali metal in each period have a) smallest size b) lowest IE c) highest IE d) highest electro negtivity 43.Which of the following is not isoelectronic with O2 a) N3 b) Na c) F d) Ti 44.The element with Z=26 will be found in group a) 2 b) 8 c) 6 d) 10 45.The valancy of noble gases, in general is a) 0 b) 1 c) 3 d) 2 46.The oxide of which of the following will be acidic a) Mg b) Rb c) Li d) Cl 47.Which of the following decreases in going down the halogen group? a) Ionic Radiaus b) Atomic radius c) IE d) Boiling point 48.Which of the following requires radiation of highest frequency to cause emission of electron? a) Na b) Mg c) K d) Ca 49.Which of the following is associated with biggest jump between 2nd and 3rd IE?
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a) 1s22s22p2 b) 1s22s22p63s1 c) 1s22s22p63s2 d) 1s22s22p1 50.Among the following which one will have highest electron affinity? a) 1s1 b) 1s22s1 c) 1s22s22p4 d) 1s22s22p5
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