JEE Main Previous Year Papers Questions of Chemistry With Solutions are available at eSaral. Simulator Previous Years AIEEE/JEE Mains Questions Q. The set representing the correct order of ionic radius is ? (1) $\mathrm{Li}^{+}>\mathrm{Na}^{+}>\mathrm{Mg}^{2+}>\mathrm{Be}^{2+}$ (2) $\mathrm{Mg}^{2+}>\mathrm{Be}^{2+}>\mathrm{Li}^{+}>\mathrm{Na}^{+}$ (3) $\mathrm{Li}^{+}>\mathrm{Be}^{2+}>\mathrm{Na}^{+}>\mathrm{Mg}^{2+}$ (4) $\mathrm{Na}^{+}>\mathrm{Li}^{+}>\mathrm{Mg}^{2+}>\mathrm{Be}^{2+}$ [AIEEE 2009]
Ans. (4)
Q. The correct order of electron gain enthalpy with negative sign of F, Cl, Br and I, having atomic number 9, 17, 35 and 53 respectively, is ? (1) I > Br > Cl > F (2) F > Cl > Br > I (3) Cl > F > Br > I (4) Br > Cl > I > F [AIEEE 2011]
Ans. (3)
Q. The increasing order of the ionic radii of the given isoelectronic species is ? (1) $\mathrm{K}^{+}, \mathrm{S}^{2-}, \mathrm{Ca}^{2+}, \mathrm{Cl}^{-}$ (2) $\mathrm{Cl}^{-}, \mathrm{Ca}^{2+}, \mathrm{K}^{+}, \mathrm{S}^{2-}$ (3) $\mathrm{S}^{2-}, \mathrm{Cl}^{-}, \mathrm{Ca}^{2+}, \mathrm{K}^{+}$ (4) $\mathrm{Ca}^{2+}, \mathrm{K}^{+}, \mathrm{Cl}^{-}, \mathrm{S}^{2-}$ [AIEEE 2012]
Ans. (4)
Q. Which of the following represents the correct order of increasing first ionization enthalpy for Ca, Ba, S, Se and Ar ? (1) Ca < S < Ba < Se < Ar (2) S < Se < Ca < Ba < Ar (3) Ba < Ca < Se < S < Ar (4) Ca < Ba S < Se < Ar [JEE-Main 2013]
Ans. (3)
Q. The first ionisation potential of Na is 5.1 eV. The value of electron gain enthalpy of $\mathrm{Na}^{+}$ will be? (1) – 2.55 eV (2) – 5.1 eV (3) – 10.2 eV (4) + 2.55 eV [JEE-Main 2013]
Ans. (4)
Q. Electron gain enthalpy with negative sign of fluorine is less than that of chlorine due to: (1) Smaller size of chlorine atom (2) Bigger size of 2p orbital of fluorine (3) High ionization enthalpy ol fluorine (4) Smaller size of fluorine atom [JEE-MAIN 2013 (OnLine)]
Ans. (4)
Q. The order of increasing sizes of atomic radii among the elements O, S, Se and As is ? (1) As < S < O < Se (2) O < S < As < Se (3) Se < S < As < O (4) O < S < Se < As [JEE-MAIN 2013 (OnLine)]
Ans. (4)
Q. Which is the correct order of second ionization potential of C, N, O and F in the following? (1) O > F > N > C (2) O > N > F > C (3) C > N > O > F (4) F > O > N > C [JEE-MAIN 2013 (OnLine)]
Ans. (1)
Q. Which of the following series correctly represents relations between the elements from X to Y ?
[JEE-MAIN 2014 (OnLine)] Ans. (3)
Q. Which of the following atoms has the highest first ionization energy ? (1) Sc (2) Rb (3) Na (4) K [JEE-MAIN 2016]
Ans. (1) Due to poor shielding of d-electrons in Sc, $Z_{\mathrm{eff}}$ of Sc becomes more so that ionisation energy of Sc is more than Na, K and Rb.
Q. The group having isoelectronic species is :- (1) $\mathrm{O}^{2-}, \mathrm{F}^{-}, \mathrm{Na}^{+}, \mathrm{Mg}^{2+}$ (2) $\mathrm{O}^{-}, \mathrm{F}^{-}, \mathrm{Na}, \mathrm{Mg}^{+}$ (3) $\mathrm{O}^{2-}, \mathrm{F}^{-}, \mathrm{Na}, \mathrm{Mg}^{2+}$ (4) $\mathrm{O}^{-}, \mathrm{F}^{-}, \mathrm{Na}^{+}, \mathrm{Mg}^{2+}$ [JEE-MAIN 2017]
Ans. (1)
Periodic Table can be revised alongside related topics using the JEE Mains PYQ chapter-wise PDF download collection for organised practice
Chapter practice builds concepts, but timed papers build speed. Once you're done here, move to our JEE Main previous year question paper to attempt Periodic Table in a real, timed setting.
.
