JEE Mains · Chemistry · STD 12 - 4. d and f- block elements
Which of the following compounds is metallic and ferromagnetic ?
- A \(VO_2\)
- B \(MnO_2\)
- C \(TiO_2\)
- D \(CrO_2\)
Answer & Solution
Correct Answer
(D) \(CrO_2\)
Step-by-step Solution
Detailed explanation
Out of all the four given metallic oxides \(C r O_{2}\) is attacted by magnetic field very strongly. The effect persists even when the magnetic field is removed. Thus \(C r O_{2}\) is metallic and ferromagnetic in nature.
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
- Among the following allotropic forms of sulphur, the number of allotropic forms, which will show paramagnetism is ..... . \((A)\) \(\alpha\) -sulphur \((B)\) \(\beta\) -sulphur \((C)\) \(S _{2}\) -formJEE Mains 2021 Easy
- For reaction \(A \rightarrow P\), rate constant \(k = 1.5 \times 10^3\) s\(^{-1}\) at \(27°\)C. If activation energy for the above reaction is \(60\) kJ mol\(^{-1}\), then the temperature (in \(°\)C) at which rate constant, \(k = 4.5 \times 10^3\) s\(^{-1}\) is _______. (Nearest integer)
Given : \(\log 2 = 0.30\), \(\log 3 = 0.48\), \(R = 8.3\) J K\(^{-1}\) mol\(^{-1}\), \(\ln 10 = 2.3\)JEE Mains 2026 Medium - Correct statements from the following are:
A. Nitrogen in oxidation states from \(+1\) to \(+4\) disproportionates in acid medium.
B. Nitrogen has the ability to form \(d\pi - p\pi\) multiple bonds with itself and other elements with small size and high electronegativity.
C. N-N single bond is stronger than P-P single bond.
D. Nitrogen has highest density in its group due to small size.
E. The maximum covalency of nitrogen is four since it has only four valence orbitals for bonding.
Choose the correct answer from the options given below:JEE Mains 2026 Medium - Match List\(-I\) with List\(-II :\)
Choose the correct answer form the options given below :List\(-I\) (Species) List\(-II\) (Hybrid Orbitals) \((a)\) \(\mathrm{SF}_{4}\) \((i)\) \(\mathrm{sp}^{3} \mathrm{~d}^{2}\) \((b)\) \(\mathrm{IF}_{5}\) \((ii)\) \(\mathrm{d}^{2} \mathrm{sp}^{3}\) \((c)\) \(\mathrm{NO}_{2}^{+}\) \((iii)\) \(\mathrm{sp}^{3} \mathrm{~d}\) \((d)\) \(\mathrm{NH}_{4}^{+}\) \((iv)\) \(\mathrm{sp}^{3}\) \((v)\) \(\mathrm{sp}\) JEE Mains 2021 Hard - If equal volumes of \(\mathrm{AB}_2\) and XY (both are salts) aqueous solutions are mixed, which of the following combination will give a precipitate of \(\mathrm{AY}_2\) at 300 K ?
(Given \(\mathrm{K}_{\mathrm{sp}}\) (at 300 K) for \(\mathrm{AY}_2=5.2 \times 10^{-7}\))JEE Mains 2025 Medium - The correct order of reactivity in electrophilic substitution reaction of the following compounds is _______.
JEE Mains 2024 Hard
More PYQs from JEE Mains
- A particle is moving with constant acceleration \('a'.\) Following graph shows \(v^{2}\) versus \(x\) (displacement) plot. The acceleration of the particle is \(......{m} / {s}^{2}\)
JEE Mains 2021 Hard - A cylinder with fixed capacity of \(67.2\, lit\) contains helium gas at \(STP\). The amount of heat needed to raise the temperature of the gas by \(20\,^oC\) is ..... \(J\) [Given that \(R = 8.31\, J\, mol^{-1}\, K^{-1}\)]JEE Mains 2019 Medium
- The area bounded by the lines \(y=\| x-1|-2 |\) isJEE Mains 2021 Hard
- To increase the resonant frequency in series \(LCR\) circuit,JEE Mains 2022 Medium
- Number of electron deficient molecules among the following \(PH _{3}, B _{2} H _{6}, CCl _{4}, NH _{3}, LiH\) and \(BCl _{3}\) is ..... .JEE Mains 2022 Easy
- 500 mL of 1.2 M KI solution is mixed with 500 mL of \(0.2~M~KMnO _4\) solution in basic medium. The liberated iodine was titrated with standard \(0.1~M~Na _2 S_2 O _3\) solution in the presence of starch indicator till the blue color disappeared. The volume (in L ) of \(Na _2 S_2 O _3\) consumed is __________. (Nearest integer)JEE Mains 2026 Easy