Chemistry
Practice Chemistry MCQs from the Science syllabus.
What is the term for a reaction where oxidation and reduction occur simultaneously?
What does a double arrow ($ ightleftharpoons$) in a chemical equation indicate?
What is the concentration of OH- ions in a solution with a pH of 10 at 25°C?
In the reaction $H_2 + Cl_2 \xrightarrow{light} 2HCl$, light energy is used to:
Which of the following metals can displace Hydrogen from steam but not from cold water?
What is the mass of one mole of Nitrogen gas ($N_2$)?
The reaction $NH_3 + HCl \rightarrow NH_4Cl$ is an example of:
What is the oxidation number of oxygen in $H_2O_2$ (hydrogen peroxide)?
What weight of Oxygen is contained in 44g of $CO_2$?
Which of the following is true regarding a 'Positive Catalyst'?
What happens when Carbon dioxide is passed through limewater for a LONG time?
Which of the following is the most reactive non-metal?
In the reaction $PCl_5 \rightleftharpoons PCl_3 + Cl_2$, how will the equilibrium shift if the pressure is increased?
Which of the following is a balanced equation for the reaction of Methane with Oxygen (complete combustion)?
In the balanced equation $aH_2 + bO_2 \rightarrow cH_2O$, what is the sum of a+b+c?
What is the chemical reaction where two or more substances combine to form a single product?
Which of the following represents a decomposition reaction?
What is the product of the reaction between Hydrogen and Oxygen?
What gas is evolved when Magnesium reacts with dilute Hydrochloric acid?