JEE MAINS · Chemistry
Classification of Elements and Periodicity in Properties
226 practice questions for JEE Mains — 135 easy · 80 medium · 11 hard. Every question is graded instantly with a step-by-step solution when you miss it.
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MCQ
Which of the following orders of ionic radii is correctly represented?
MCQ
Consider the following elements. Which of the following is/are true about $A^{'},B^{'},C^{'}$and $D^{'}$? A. Order of atomic radii: $B^{'}B. Order of metallic character : $$B^{'}C.$ Size of the element : $D^{'}D. Order…
MCQ
The class of drug to which chlordiazepoxide with above structure belongs is :
MCQ
The increasing order of the atomic radii of the following elements is: $\left(a\right)C$ $\left(b\right)O$ $\left(c\right)F$ $\left(d\right)Cl$ $\left(e\right)Br$
MCQ
Identify the elements $X$ and $Y$ using the ionization energy values given below : $\begin{matrix} & \mathrm{Ionization}\mathrm{energy} & (\mathrm{kJ}/\mathrm{mol}) \\ & 1^{\mathrm{st}} & 2^{\mathrm{nd}} \\ X & 495 &…
MCQ
Match List-$I$with List-$\mathrm{II}$. List-$I$ Electronic configuration of elements List-$\mathrm{II}$ $\Delta\,_{i}H$ in $\mathrm{kJ}\mathrm{mol}^{-1}$ $\left(a\right)$ $1s^{2}2s^{2}$ $\left(p\right)$ $801$…
Numerical
The atomic number of Unnilumium is ______?
MCQ
Match List - I with List - II LIST-I (Atomic number) LIST-II (Block of periodic table) (A) $37$ I. $p$-block (B) $78$ II. $d$-block (C) $52$ III. $f$-block (D) $65$ IV. $s$-block Choose the correct answer from the…
Numerical
If IUPAC name of an element is "Unununnium" then the element belongs to nth group of periodic table. The value of $n$ is _______.
Numerical
Lowest Oxidation number of an atom in a compound $A_{2}B$ is $-2.$ The number of an electron in its valence shell is
MCQ
Which of the following atoms has the highest first ionization energy?
MCQ
In which of the following pairs, electron gain enthalpies of constituent elements are nearly the same or identical? (A) $\mathrm{Rb}$ and$\mathrm{Cs}$ (B) Na and $K$ (C) $\mathrm{Ar}$ and$\mathrm{Kr}$ (D) $I$…