Chemistry
Practice Chemistry MCQs from the Science syllabus.
Which type of chemical reaction is represented by the general equation A + B → AB?
What is the process of adding oxygen to a substance called?
Which of the following substances is used as a catalyst in the laboratory preparation of oxygen from potassium chlorate?
When an acid reacts with a base to form salt and water, the reaction is known as:
Which gas is evolved when zinc granules react with dilute sulfuric acid?
In a chemical equation, what does the symbol (s) represent?
A reaction that releases heat energy into the surroundings is called:
Which of these is an example of a decomposition reaction?
What happens to the rate of a chemical reaction when the temperature is increased?
Which substance is reduced in the reaction: CuO + H2 → Cu + H2O?
The reaction between iron and copper sulfate solution is an example of:
What are the substances that take part in a chemical reaction called?
Which of the following is a physical change rather than a chemical reaction?
In the reaction $2Mg + O_2 \rightarrow 2MgO$, what is the ratio of Mg to O2 atoms/molecules by stoichiometric coefficients?
Which of the following is a characteristic of a chemical reaction?
What is the product formed when quicklime (CaO) reacts with water?
Which of the following is an irreversible reaction under normal conditions?
What is the precipitate formed when sodium chloride reacts with silver nitrate solution?
Which gas is used for the commercial preparation of Ammonia by Haber's process besides Hydrogen?
What is the sign of ∆H (change in enthalpy) for an endothermic reaction?