Given below are two statements.
Statement I: \(O_2, Cu^{2+}, \;and\; Fe^{3+}\) are weakly attracted by magnetic field and are magnetized in the same direction as magnetic field.
Statement II: \(NaCl\) and \(H_2O\) are weakly magnetized in opposite directions to the magnetic field.
In the light of the above statements, choose the most appropriate answer from the options given below.
Statement I: \(O_2, Cu^{2+}, \;and\; Fe^{3+}\) are weakly attracted by magnetic field and are magnetized in the same direction as magnetic field.
Statement II: \(NaCl\) and \(H_2O\) are weakly magnetized in opposite directions to the magnetic field.
In the light of the above statements, choose the most appropriate answer from the options given below.
- Both Statement I and Statement II are correct.
- Both Statement I and Statement II are incorrect.
- Statement I is correct but Statement II is incorrect.
- Statement I is incorrect but Statement II is correct.
The Correct Option is A
Approach Solution - 1
To determine the correctness of the given statements about the magnetic properties of substances, let's explore the relevant concepts:
- Statement I: \(O_2, Cu^{2+}, \;and\; Fe^{3+}\) are weakly attracted by magnetic field and are magnetized in the same direction as magnetic field.
This statement describes the characteristics of paramagnetic substances. Paramagnetic materials are attracted by magnetic fields and their internal magnetic field aligns with the direction of the external magnetic field. Both \(O_2\) (oxygen molecule) and transition metal ions like \(Cu^{2+}\) and \(Fe^{3+}\) have unpaired electrons, which give them their paramagnetic properties. Therefore, Statement I is correct. - Statement II: \(NaCl\) and \(H_2O\) are weakly magnetized in opposite directions to the magnetic field.
This describes diamagnetic materials, which are characterized by a very weak magnetic moment that opposes the direction of the applied magnetic field. Both sodium chloride (an ionic compound) and water (a simple molecular compound) are diamagnetic because all their electrons are paired and thus they create a small magnetic field in the opposite direction. Hence, Statement II is correct.
Based on the explanations above, the correct answer is:
Both Statement I and Statement II are correct.
Approach Solution -2
\(O_2, Cu^{2+} \;and\; Fe^{3+}\) have\( 2, 1\) and \(5\) unpaired electrons respectively, so these are the paramagnetic species. Hence, they are attracted by magnetic field.
\(NaCl\) and \(H_2O\) are the diamagnetic species so they are repelled by the magnetic field.
The correct answer is (A): Both Statement I and Statement II are correct
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Top JEE Main bond energies Questions
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Concepts Used:
Bond Energies
A chemical compound is made up of different types of atoms. A chemical link holds these atoms together. Chemical bonds are created between atoms when electrons are transferred or valence electrons are shared. The bond energy is useful in thermochemistry because it may be used to calculate the enthalpy of various chemical reactions, such as burning. The enthalpy of reaction is the difference between bond breaking and bond forming during a chemical process.
Different Bond Energies:
A covalent bond is set up when connected iotas in an atom share electrons similarly. With an increment in the quantity of connections between connected molecules, the energy or strength of a synthetic bond increases. As such, when the bond request expands, the synthetic bond's solidarity builds, raising the bond energy much higher. Bond energies of a solitary, twofold, and triple covalent connection between carbon iotas, for instance, are as per the following:
| Covalent Bond | Bond Energy |
|---|---|
| C-C | 348 kJ//mol |
| C=C | 614 kJ//mol |
| C≡C | 839 kJ//mol |