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प्रश्न
How will you identify?
Sulphur dioxide gas
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उत्तर
It is a colourless gas with a smell of burnt sulphur. It turns moist blue litmus paper red and finally bleaches it.
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संबंधित प्रश्न
What is the name given to the salts of sulphuric acid?
Give reasons for the following:
A piece of wood becomes black when concentrated sulphuric acid is poured on it.
What would you observe in the following case?
100ml of 98% sulphuric acid is kept open.
How are the following conversion brought about? Give equation and condition:
Aqueous lead nitrate to lead sulphate.
Give examples of the use of sulphuric acid as
An electrolyte in everyday use
A, B, C and D summarise the properties of sulphuric acid depending on whether it is dilute or concentrated.
A = Typical acid property
B = Non-Volatile acid
C = Oxidising agent
D = Dehydrating agent
Choose the property (A, B, C or D) depending on which is relevant to each of the following :
(i) Preparation of hydrogen chloride gas
(ii) Preparation of copper sulphate from copper oxide
(iii) Action of cone, sulphuric acid on sulphur
Write a balanced chemical equation:
When hot and concentrated sulphuric acid reacts with the NaOH.
What property of conc. H2SO4 is made use of in the following case? Give an equation for the reaction in this case:
It’s reaction with ethanol.
The following is the typical property of dilute acid. Complete it by inserting suitable words:
\[\ce{Carbonate/hydrogen carbonate + Acid -> \underline{\phantom{.......}} + \underline{\phantom{.......}} + \underline{\phantom{.......}}}\]
Identify the following:
The element having electronic configuration 2, 8, 6.
