Conc H2SO4 is not used in the preparation of H2S. Explain Answer: Concentrated H2SO4 is not used in H2S preparation. Because concentrated H2SO4 is an oxidising acid; The H2S produced by the acid reaction with ferrous sulphide oxidizes concentrated H2SO4 to sulphur, which itself reduces to produce sulfur dioxide (SO2). H2S + H2SO4 = S […]
Conc H2SO4 is not used in the preparation of H2S. Explain Read More »
Is Hydrogen Sulfide an Acid? Answer: Aqueous solutions of Hydrogen sulfide (H2S) are acidic. This solution reacts with alkalis such as sodium hydroxide to produce sulphide salts and water and turns blue litmus red. NaOH +H2S = NaHS + H2O 2NaOH + H2S = Na2S + 2H2O Hence, hydrogen sulfide is an acid.
Is H2S a Reducing agent? Answer: H2S is a strong Reducing agent. Running H2S into red bromine water turns the bromine water colourless. Hydrogen sulphide reduces bromine to hydrobromic acid and is itself oxidized to sulphur. H2S + Br2 = 2HBr + S
Is H2S Flammable, or a Combustion Aid? Answer: H2S itself is flammable, but not a combustion aid. If a burning wick is inserted into a gas jar full of H2S, the wick will be extinguished, but the gas will burn with a blue flame.
What happens when Sulphur dioxide reacts with Oxygen? Answer: Aqueous solution of H2S becomes turbid in presence of air. When an aqueous solution of H2S is exposed to open air, the oxygen in the air slowly oxidizes the solution to form sulphur. As the resulting sulfur mixes with the solution, the solution becomes turbid. 2H2S
What happens when Sulphur dioxide reacts with Oxygen? (exposed to air) Read More »
An electric lamp is one of the devices that work by exploiting the thermal effect of electric current. A sealed glass bulb consists of two thick wires. A narrow and long coil of tungsten wire is attached to both ends of it. This coil of wire is called the filament. The bulb is evacuated or
A vibration that travels through the material world around us is known as sound. Before reaching our ears, these vibrations generate sound waves that travel across mediums like air and water. Can sound travel in a vacuum? This question is explained below. Can sound travel in a vacuum? Sound cannot pass through an empty medium.
Can sound travel in a vacuum? Experiment to support the statement. Read More »
Between a thin and a thick copper wire of equal length, the resistance of the thin wire is higher. As we know, the heat generated in a conductor is proportional to the resistance of the conductor if the flow rate and flow time are constant. So, since the same current is being sent through both
What happens if a bell rings which is kept in a vacuum? Answer: If bells are rung in airless containers, they cannot be heard. Because the spread of the sound requires a physical medium. Even if the bell is ringing, the sound produced cannot propagate due to the absence of a medium as the vessel
What happens if a bell rings which is kept in a vacuum? Read More »
How does an electric heater work? Answer: Electric heaters are one of the devices that work by using the thermal effect of electric current. Electric heaters can withstand high temperatures and consist of coils of nichrome wire placed in circular grooves on discs made of non-conductive mica or fire clay. When the two ends of
