Practice the essential concepts of matter, atomic structure, chemical reactions, bonding and everyday applications of chemistry.
Questions are tracked as practiced when you open Show Answer & Explanation. Tracking stays only in this browser tab and no subject-test result is saved.
At chemical equilibrium, the rate of forward reaction is:
What is the chemical formula for sucrose the common table sugar?
Which type of reaction releases energy to the surroundings causing the temperature to rise?
What type of reaction converts an alkene into an alkane?
Which of the following elements is most abundant in Earth's crust?
Which type of organic compounds contain only carbon and hydrogen atoms?
A limiting reagent in a reaction is the reactant that:
Which polymer is used to make plastic water bottles and is identified by recycling code 1?
Which process occurs at the anode during electrolysis?
Which of the following is used to detect the presence of starch?
Which gas is responsible for the distinctive smell of rotten eggs?
What is the chemical name of the compound with formula CuSO4?
Which element is used in nuclear reactors as fuel due to its fissile properties?
What is the primary use of the element iodine in the human body?
What is the chemical formula for calcium carbonate found in limestone and chalk?
Which element is essential for synthesis of haemoglobin and its deficiency causes anaemia?
What is the chemical formula for nitric acid used in fertiliser and explosive manufacturing?
Which layer of the atmosphere contains the ozone layer that protects Earth from UV radiation?
What is the name of the vertical columns in the periodic table?
What is the chemical formula for ethanol?