Chemistry
Practice Chemistry MCQs from the Science syllabus.
How many moles of hydrogen are required to produce 2 moles of Ammonia (NH3)?
In the reaction $H_2 + Cl_2 \rightarrow 2HCl$, which of the following is true regarding electrons?
According to Le Chatelier's Principle, what will happen to the equilibrium of the reaction $N_2 + 3H_2 \rightleftharpoons 2NH_3 + Heat$ if the temperature is increased?
Calculate the mass of Oxygen required to burn 12g of Carbon completely.
Which of the following is a disproportionation reaction?
If 50g of $CaCO_3$ is heated, what volume of $CO_2$ is produced at NTP? (Molar mass of $CaCO_3 = 100g/mol$)
What is the oxidation number of Sulfur in $H_2SO_4$?
Which of the following is an example of an autocatalytic reaction?
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.