Advertisements
Advertisements
प्रश्न
How will you identify?
Sulphur dioxide gas
Advertisements
उत्तर
It is a colourless gas with a smell of burnt sulphur. It turns moist blue litmus paper red and finally bleaches it.
APPEARS IN
संबंधित प्रश्न
Give reason for the following:
Red brown vapours are produced when concentrated sulphuric acid is added to hydrogen bromide.
Give reasons for the following:
Brisk effervescence is seen when oil of vitriol is added to sodium carbonate.
Complete the following equations :
C + cons. H2SO4
Name the following:
Solution obtained by dissolving sulphur trioxide in 98% sulphuric acid.
How are the following conversion brought about? Give equation and condition:
Aqueous lead nitrate to lead sulphate.
Name two other acids other than sulphuric acid, which can be prepared by using sulphuric acid.
Some properties of sulphuric acid are listed below. Choose the property A, B, C or D which is responsible for the reaction (a) to (e). Some properties may be repeated.
A. Acid
B. Dehydrating agent
C. Non-volatile acid
D. Oxidizing agent
(a) \[\ce{C12H22O11 + nH2SO4 -> 12C + 11H2O + nH2SO4}\]
(b) \[\ce{S + 2H2SO4 -> 3SO2 + 2H2O}\]
(c) \[\ce{NaCl + 2H2SO4 -> NaHSO4 + HCl}\]
(d) \[\ce{CuO + 2H2SO4 -> CuSO4 + H2O}\]
(e) \[\ce{Na2CO3 + H2SO4 -> Na2SO4 + H2O + CO2}\]
Write a balanced chemical equation:
When hot and concentrated sulphuric acid reacts with the NaOH.
Which property of sulphuric acid accounts for its use as a dehydrating agent?
The following is the typical property of dilute acid. Complete it by inserting suitable words:
\[\ce{Active metal + Acid -> \underline{\phantom{.......}} + \underline{\phantom{.......}}}\]
