Advertisements
Advertisements
प्रश्न
Answer the following.
Distinguish between rhombic sulfur and monoclinic sulfur.
Advertisements
उत्तर
The following are the points of difference between rhombic (α-sulfur) and monoclinic (β - sulfur):
| Rhombic sulfur (α-sulfur) |
Monoclinic sulfur (β- sulfur) |
| 1. It is a pale yellow coloured solid. | 1. It is bright yellow solid |
| 2. It forms orthorhombic crystals | 2. It forms needle-shaped monoclinic crystals |
| 3. Its melting point is 385.8 K. | 3. Its melting point is 393 K. |
| 4. Its density is 2.06 g/cm3 | 4. Its density is 1.98 g/cm3 |
| 5. It is insoluble in water and soluble in CS2 | 5. Soluble in CS2 |
| 6. It is stable below 369 K and transforms to β-sulfur above this temperature | 6. It is stable above 369 K and transforms into α-sulfur below this temperature. |
| 7. It is prepared by the evaporation of rolls sulfur in CS2. | 7. It is prepared from rhombic sulfur. |
APPEARS IN
संबंधित प्रश्न
In interhalogen compounds, which of the following halogens is never the central atom?
Select appropriate answers for the following.
In which of the following pairs, molecules are paired with their correct shapes?
Select appropriate answers for the following.
Among the known interhalogen compounds, the maximum number of atoms is _______.
Answer the following.
Write the order of the thermal stability of the hydrides of group 16 elements.
Give two uses of ClO2.
The pKa value of HCl is −7.0 and that of HI is −10.0. Which is the stronger acid?
Complete the following.
\[\ce{ICl3 + H2O -> \underline{}\underline{}\underline{}\underline{} + \underline{}\underline{}\underline{}\underline{} + ICl}\]
Complete the following.
l2 + KClO3 → _______ + KIO3
Complete the following.
Cl2 + ClF3 → _______
Match the following:
| A | B |
| XeOF2 | Xenon trioxydifluoride |
| XeO2F2 | Xenon monooxydifluoride |
| XeO3F2 | Xenon dioxytetrafluoride |
| XeO2F4 | Xenon dioxydifluoride |
What is the oxidation state of xenon in the following compounds?
XeOF4, XeO3, XeF6, XeF4, XeF2.
Answer the following.
Acidic character of hydrides of group 16 elements increases from H2O to H2Te. Explain.
Fluorine shows only –1 oxidation state while other halogens show –1, +1, +3, +5 and +7 oxidation states. Explain.
How is SO2 prepared in the laboratory from sodium sulfite?
Acidic strength of halogen acids increases in the order of _______.
The halide that undergoes sp3d hybridisation is ____________.
____________ and ____________ are the rarest elements of the group 18.
Identify the properties of group 17 elements that show decreasing trend down the group.
i. Atomic radius
ii. Ionisation enthalpy
iii. Electronegativity
Which one of the following ions has same number of unpaired electrons as those present in V3+ ion?
Which of the following is INCORRECT with respect to given reaction?
\[\ce{C6H12O6 + 6O2 -> 6CO2 + 6H2O}\]
What is the highest oxidation state possessed by phosphorus in it's oxyacids?
What is the oxidation state of sulfur in the product formed?
\[\ce{S + \underset{(Conc.)}{2H2SO4} ->}\]
The oxidation state of halogen atom in perhalic acid and hypohalous acid are respectively ____________.
Which is the lowest oxidation state possessed by chlorine in it's oxyacids?
Which of the following oxyacid of chlorine is thermally least stable?
Which among the following gases is used to produce and sustain powerful super conducting magnets for NMR and MRI systems?
What is the oxidation state of sulphur in oil of vitriol?
What are the allotropes of oxygen?
What is the action of hydrochloric acid on the following?
Na2CO3
Arrange the following in the increasing order of the property mentioned:
\[\ce{HOCl}\], \[\ce{HClO2}\], \[\ce{HClO3}\], \[\ce{HClO4}\] (acidic strength)
