Question Bank
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In the reaction $I_2 + 2S_2O_3^{2-} \rightarrow 2I^- + S_4O_6^{2-}$, iodine is acting as a/an:
What is the effect of adding a catalyst to a reversible reaction at equilibrium?
What is the concentration of $H^+$ ions in a neutral solution at 25°C?
Which of the following describes a 'redox' reaction according to the transfer of electrons?
How many grams of Magnesium are required to produce 40g of Magnesium Oxide ($MgO$)? (Mg=24, O=16)
What type of reaction is the formation of ozone ($O_3$) from oxygen ($O_2$) in the upper atmosphere?
In the contact process for making sulfuric acid, what is the catalyst used in the step: $2SO_2 + O_2 \rightleftharpoons 2SO_3$?
Which law states that 'Matter is neither created nor destroyed during a chemical reaction'?
What is the oxidation state of Nitrogen in Ammonia ($NH_3$)?
Which of the following is a balanced equation for the reaction of Aluminum with Chlorine?
In the reaction $H_2S + I_2 \rightarrow 2HI + S$, identify the substance that is reduced.
What happens when an iron nail is dipped in a blue copper sulfate solution?
Which type of reaction is represented by $2KClO_3 \xrightarrow{\Delta, MnO_2} 2KCl + 3O_2$?
What is the role of sunlight in the reaction between Methane and Chlorine?
In the reaction $CuO + CO \rightarrow Cu + CO_2$, which substance is the reducing agent?
Which gas is evolved when calcium carbonate reacts with dilute hydrochloric acid?
An example of a reaction where a solid and a gas react to form another solid is:
What is the color change when phenolphthalein is added to an alkaline solution (base)?
Which of the following is an endothermic reaction?
In the reaction $2H_2S + SO_2 \rightarrow 3S + 2H_2O$, identify the oxidizing agent.