Which of the following is paramagnetic?
Show Hint
- $\mathrm{O}_2$
- $\mathrm{N}_2$
- $\mathrm{O}_2^{2-}$
- $\mathrm{H}_2$
The Correct Option is A
Solution and Explanation
Paramagnetic substances have unpaired electrons.
Step 2: Detailed Explanation:
$\mathrm{O_2}$ has two unpaired electrons in $\pi^*$ orbitals, hence paramagnetic.
Step 3: Final Answer:
$\mathrm{O}_2$ is paramagnetic.
Top MET Chemistry Questions
- In the oxidation of C\(_6\)H\(_5\)-CH\(_2\)-CH\(_3\) by KMnO\(_4\) the product formed is
- MET - 2019
- Chemistry
- Organic Reactions
- C\(_6\)H\(_6\) consists of one ring, while naphthalene consists of two rings. Both of them are aromatic and obey the (4n+2) rule. Thus the number of \(\pi\)-electrons inside rings of C\(_6\)H\(_6\) and naphthalene are respectively
- MET - 2019
- Chemistry
- Chemical bonding and molecular structure
- Acetyl salicylic acid is used as
- MET - 2019
- Chemistry
- Biomolecules
- In acid medium nitrobenzene is reduced to aniline as shown in the reaction C\(_6\)H\(_5\)-NO\(_2\) + 6[H] \(\rightarrow\) C\(_6\)H\(_5\)-NH\(_2\) + 2H\(_2\)O. The reducing agent used in this reaction is
- MET - 2019
- Chemistry
- Organic Reactions
- Among H—CHO, CH\(_3\)CHO and C\(_6\)H\(_5\)CHO, which will undergo Cannizzaro's reaction?
- MET - 2019
- Chemistry
- Organic Reactions
Top MET Chemical bonding and molecular structure Questions
- C\(_6\)H\(_6\) consists of one ring, while naphthalene consists of two rings. Both of them are aromatic and obey the (4n+2) rule. Thus the number of \(\pi\)-electrons inside rings of C\(_6\)H\(_6\) and naphthalene are respectively
- MET - 2019
- Chemistry
- Chemical bonding and molecular structure
- Bond between A and B can be represented by A \(\rightarrow\) B, A\(^+\)B\(^-\), A\(^-\)B\(^+\). If A is more electronegative than B, then least contribution to the actual structure comes from
- MET - 2019
- Chemistry
- Chemical bonding and molecular structure
- XeF\(_2\) is isostructural with
- MET - 2019
- Chemistry
- Chemical bonding and molecular structure
- In the process, O\(_2^+\) \(\rightarrow\) O\(_2^{2+}\) + e\(^-\), the electron lost is from
- MET - 2019
- Chemistry
- Chemical bonding and molecular structure
- Which of the following is not correct for ionic crystals?
- MET - 2019
- Chemistry
- Chemical bonding and molecular structure
Top MET Questions
- Radiation, with wavelength 6561 $?$ falls on a metal surface to produce photoelectrons. The electrons are made to enter a uniform magnetic field of $3 \times 10^{-4} T$. If the radius of the largest circular path followed by the electrons is 10 mm, the work function of the metal is close to :
- MET - 2020
- Photoelectric Effect
- If \(f(x) = \begin{cases} x, & 0 \le x \le 1 \\ 2x - 1, & 1<x \end{cases}\), then
- MET - 2019
- Continuity
Helicopters are very different from airplanes. They can do three things that airplanes cannot do. First, when airplanes move upward, they must also move forward, but helicopters can move straight up without moving ahead. Second, helicopters can fly backward, which airplanes cannot do. Third, helicopters can use their rotors to hover in the air, which is impossible for airplanes. Helicopters can perform actions that airplanes cannot, they are used for different tasks. Since, helicopters can take off without moving forward, they do not need a runway for take off. They are used in congested areas where there is no room for airplanes or in isolated areas, which do not have airports. Because they can hover, they are used on firefighting missions to drop water on fires. They are used in logging operations to lift trees out of forests. Helicopters are used as air ambulances to airlift patients out of situations, which are difficult to reach by conventional ambulances. The police used helicopters to follow suspects on the ground or to search for cars on the ground. Of course, helicopters have military uses because of their design and capabilities.
- MET - 2019
- Reading Comprehension
- Find the missing character.
- MET - 2019
- Number Patterns
- 6, 9, 12, 15, 18, ?
- MET - 2019
- Number Patterns