Advertisements
Advertisements
प्रश्न
Answer the following.
Write the names of allotropic forms of selenium.
उत्तर
Allotropes of Selenium: Red and grey selenium
APPEARS IN
संबंधित प्रश्न
Select appropriate answers for the following.
BrCl reacts with water to form _______.
Select appropriate answers for the following.
Chlorine reacts with excess of fluorine to form _______.
In interhalogen compounds, which of the following halogens is never the central atom?
Select appropriate answers for the following.
Which of the following has one lone pair of electrons?
Select appropriate answers for the following.
In which of the following pairs, molecules are paired with their correct shapes?
Answer the following.
Write the order of the thermal stability of the hydrides of group 16 elements.
Answer the following.
What is the oxidation state of Te in TeO3?
Answer the following.
Give two uses of ClO2.
Complete the following.
\[\ce{ICl3 + H2O -> \underline{}\underline{}\underline{}\underline{} + \underline{}\underline{}\underline{}\underline{} + ICl}\]
Complete the following.
l2 + KClO3 → _______ + KIO3
Complete the following.
2XeOF4 + SiO2 → _______ + SiF4
Answer the following.
Acidic character of hydrides of group 16 elements increases from H2O to H2Te. Explain.
Acidic strength of halogen acids increases in the order of _______.
The halide that undergoes sp3d hybridisation is ____________.
Which one of the following ions has same number of unpaired electrons as those present in V3+ ion?
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 sulphur in H2S2O7 is ______.
Which among the following gases is used to produce and sustain powerful super conducting magnets for NMR and MRI systems?
Among the trihalides of nitrogen which one is the most basic?
What is the oxidation number of gold in the complex [AuCl4]1−?
In which substance does nitrogen exhibit the lowest oxidation state?
Among the following order, which one is the correct order of reactivity of group 16 elements?
Explain reactivity of halogens towards oxygen.
What is the action metal on elements of group 17?
Arrange the following in the increasing order of the property mentioned:
\[\ce{HOCl}\], \[\ce{HClO2}\], \[\ce{HClO3}\], \[\ce{HClO4}\] (acidic strength)
