Practice free NEET NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
The products of the chemical reaction between $ Na_2S_2O_3, Cl_2 and H_2O $ are
$ SO_2 + 2H_2S \rightarrow 3S + 2H_2O $
Aqueous solutions of $ H_2S and SO_2$ when mixed together yield
When aqueous solutions of \(H_2S\) (hydrogen sulfide) and \(SO_2\) (sulfur dioxide) are mixed, they react to form sulfur and water as per the reaction: \[2H_2S + SO_2 \rightarrow 3S + 2H_2O\]. Therefore, the correct answer is sulphur and water.
An example of a neutral oxide is
$ H_2 SO_4 + SO_3 \rightarrow H_2 S_2 O_7 $
Which of the following is used to absorb sulphur dioxide
Sulphur dioxide (SO2) is an acidic gas and it can be effectively absorbed by a basic solution. KOH (potassium hydroxide) solution is a strong base and will react with SO2 to form potassium bisulfite (KHSO3). Therefore, KOH solution is used to absorb sulphur dioxide.
Which of the following is oxidized by $ SO_2 $
A salt of sulphurous acid is called
A salt of sulphurous acid (H2SO3) is called a sulphite. Sulphites are salts or esters of sulphurous acid containing the anion SO32−.
The final acid obtained during the manufacture of $ H_2SO_4 $ by contact process
Which compound acts as an oxidizing as well as reducing agent
$ SO_2 $ (sulfur dioxide) acts as both an oxidizing and reducing agent depending on the chemical reaction it is involved in. As an oxidizing agent, it can accept electrons, and as a reducing agent, it can donate electrons. This dual behavior is due to the intermediate oxidation state of sulfur in $ SO_2 $. Therefore, $ SO_2 $ is capable of undergoing both oxidation and reduction.
Bleaching action of $ SO_2$ is due to
The bleaching action of $ SO_2 $ (sulfur dioxide) is due to its reducing properties. When $ SO_2 $ is used for bleaching, it reduces the coloring matter by donating electrons, thereby decolorizing the substance. This reduction process is what leads to the bleaching effect, making $ reduction $ the correct answer.
About $ H_2SO_4 $ which is incorrect
Sulfuric acid ( $H_2SO_4$ ) is not typically considered a reducing agent. It is well-known as a strong dehydrating agent, sulphonating agent, and highly viscous liquid. Therefore, the statement that it is a reducing agent is incorrect.
Ready to ace NEET?
Free access · No credit card required
Yes. You can attempt every NEET question on this page for free without logging in, and check the correct answer with a detailed explanation instantly.
No account is required to attempt questions and view answers. A free account adds bookmarks, personal notes, and progress tracking.
The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.