Which of the following alkane cannot be made in good yield by Wurtz reaction?
| 1. | 2,3-Dimethylbutane | 2. | n-Heptane |
| 3. | n-Butane | 4. | n-Hexane |
Measuring Zeta potential is useful in determining which of the following property of a colloidal solution:
1. Solubility.
2. Stability of the colloidal particles.
3. Size of the colloidal particles.
4. Viscosity.
The freezing point of depression constant (Kf ) of benzene is 5.12 K kg mol–1. The freezing point depression for the solution of molality 0.078 m containing a non-electrolyte solute in benzene is:
1. 0.80 K
2. 0.40 K
3. 0.60 K
4. 0.20 K
The natural polymer among the following options is:
1. Poly(Butadiene-styrene)
2. Polybutadiene
3. Poly(Butadiene-acrylonitrile)
4. Cis-1,4-polyisoprene
Identify the incorrect statement.
| 1. | The transition metals and their compounds are known for their catalytic activity due to their ability to adopt multiple oxidation states and to form complexes. |
| 2. | Interstitial compounds are those that are formed when small atoms like H, C or N are trapped inside the crystal lattices of metals. |
| 3. | The oxidation states of chromium in CrO42– and Cr2O72– are not the same. |
| 4. | Cr2+(d4) is a stronger reducing agent than Fe2+(d6) in water. |
Which of the following set of molecules will have zero dipole moment?
| 1. | Boron trifluoride, hydrogen fluoride, carbon dioxide, 1 3-dichlorobenzene |
| 2. | Nitrogen trifluoride, beryllium difluoride, water, 1 3 -dichlorobenzene |
| 3. | Boron trifluoride, beryllium difluoride, carbon dioxide, 1 4-dichlorobenzene |
| 4. | Ammonia, beryllium difluoride, water, 1, 4-dichlorobenzene |
On electrolysis of dilute sulphuric acid using Platinum (Pt) electrode, the product obtained at the anode will be:
1. Oxygen gas
2. gas
3. gas
4. Hydrogen gas
The number of protons, neutrons and electrons in \( _{71}^{175}Lu\) respectively, are:
1. 104, 71 and 71
2. 71, 71 and 104
3. 175, 104 and 71
4. 71, 104 and 71
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