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QJEE MAIN 2025
The type of oxide formed by the element among $\mathrm{Li}, \mathrm{Na}, \mathrm{Be}, \mathrm{Mg}, \mathrm{B}$ and Al that has the least atomic radius is :
JEE MainChemistryEasy
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QJEE MAIN 2025
Given below are two statements : Statement (I): According to the Law of Octaves, the elements were arranged in the increasing order of their atomic...
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QJEE MAIN 2025
The amphoteric oxide among $\mathrm{V}_{2} \mathrm{O}_{3}, \mathrm{~V}_{2} \mathrm{O}_{4}$ and $\mathrm{V}_{2} \mathrm{O}_{5}$, upon reaction with alkali leads to formation of an oxide anion. The oxidation state...
JEE MainChemistryEasy
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QJEE MAIN 2025
Which of the following statements are correct? A. The process of adding an electron to a neutral gaseous atom is always exothermic. B. The process...
JEE MainChemistryEasy
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QJEE MAIN 2025
Given below are two statements : Statement (I): The first ionization energy of Pb is greater than that of Sn . Statement (II): The first...
JEE MainChemistryEasy
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QJEE MAIN 2025
The successive 5 ionisation energies of an element are $800,2427,3658,25024$ and $32824 \mathrm{~kJ} / \mathrm{mol}$, respectively. By using the above values predict the group in...
JEE MainChemistryEasy
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QJEE MAIN 2025
The property/properties that show irregularity in first four elements of group-17 is/are : (A) Covalent radius (B) Electron affinity (C) Ionic radius (D) First ionization...
JEE MainChemistryEasy
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QJEE MAIN 2025
Given below are two statements : Statement (I) : The metallic radius of Al is less than that of Ga . Statement (II) : The...
JEE MainChemistryEasy
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QJEE MAIN 2025
Given below are two statements about X -ray spectra of elements : Statement (I): A plot of $\sqrt{v}$ ( $v=$ frequency of X-rays emitted) vs...
JEE MainChemistryEasy
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QJEE MAIN 2025
An element 'E' has the ionisation enthalpy value of $374\;{\rm{kJ}}\;{\rm{mo}}{{\rm{l}}^{ - 1}}$. 'E' reacts with elements A, B, C and D with electron gain enthalpy...
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