JEE Mains · Chemistry · STD 12 - 4. d and f- block elements
The set that contains atomic number of only transition element is -
- A \(21,32,53,64\)
- B \(21,25,42,72\)
- C \(9,17,34,38\)
- D \(37,42,50,64\)
Answer & Solution
Correct Answer
(B) \(21,25,42,72\)
Step-by-step Solution
Detailed explanation
Tranition elements \(=21\) to \(30\) \(37\) to \(48\) \(57\) \(\&\) \(72\) to \(80\) Ans. \(21,25,42\, \& 72\)
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Chemistry
- In the reaction, \(C{H_3}COOH\xrightarrow{{LiAl{H_4}}}A\xrightarrow{{PC{l_5}}} \) \(B\xrightarrow{{Alc.\,KOH}}C,\) the product \(C\) is :JEE Mains 2014 Medium
- Identity the incorrect pair from the following:JEE Mains 2024 Hard
- The major product of the following reaction is \(\begin{array}{*{20}{c}}
{C{H_3}C{H_2}CH - C{H_2}} \\
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|} \\
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,Br\,\,\,\,\,\,\,\,\,Br\,\,}
\end{array}\xrightarrow[\begin{subarray}{l}
(ii)\,NaN{H_2} \\
in\,liq.\,N{H_3}
\end{subarray} ]{{(i)\,KOH\,alc.}}\)JEE Mains 2019 Hard - In a chemical reaction \(A + 2B \overset K \rightleftharpoons 2C + D\), the initial concentration of \(B\) was \(1.5\) times of \(A\) but the equilibrium concentrations of \(A\) and \(B\) were found to be equal. The equilibrium, constant \((K)\) for the aforesaid chemical reaction isJEE Mains 2019 Hard
- The total number of 'sigma' (σ) and 'Pi' (π) bonds in 2-oxohex-4-ionic acid is ______.JEE Mains 2024 Medium
- Number of carbocation from the following that are not stabilized by hyperconjugation is........... .
JEE Mains 2024 Medium
More PYQs from JEE Mains
- If \(t =\sqrt{ x }+4\), then \(\left(\frac{ dx }{ dt }\right)_{ t =4}\) is.JEE Mains 2022 Medium
- Among the given species the Resonance stabilised carbocations are:
JEE Mains 2021 Medium - A current of \(2\, mA\) was passed through an unknown resistor which dissipated a power of \(4.4\, W\). Dissipated power when an ideal power supply of \(11\, V\) is connected across it isJEE Mains 2019 Medium
- Which of the following statements regarding the energy of the stationary state is true in the following one-electron system ?JEE Mains 2026 Easy
- Sodium oxide reacts with water to produce sodium hydroxide. \(20.0\, \mathrm{~g}\) of sodium oxide is dissolved in \(500\, \mathrm{~mL}\) of water. Neglecting the change in volume, the concentration of the resulting \(\mathrm{NaOH}\) solution is \(........\times \quad 10^{-1} \quad\) \(M.\) (Nearest integer) [Atomic mass \(: \mathrm{Na}=23.0, \mathrm{O}=16.0, \mathrm{H}=1.0]\)JEE Mains 2021 Hard
- If \(y=\cos \left(\frac{\pi}{3}+\cos ^{-1} \frac{x}{2}\right)\), then \((x-y)^2+3 y^2\) is equal to _____.JEE Mains 2025 Medium