Practice the essential concepts of matter, atomic structure, chemical reactions, bonding and everyday applications of chemistry.
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Which type of reaction releases energy to the surroundings causing the temperature to rise?
Which type of organic compounds contain only carbon and hydrogen atoms?
Which type of chemical bond involves the transfer of electrons?
Which type of reaction involves an acid reacting with a base to form salt and water?
Which acid is present in vinegar?
Which polymer is used to make plastic water bottles and is identified by recycling code 1?
What is the pH of pure water at 25 degrees Celsius?
Which gas turns limewater milky when bubbled through it?
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 term for a mixture of two or more metals?
What is the chemical name of the compound with formula CuSO4?
What is the chemical formula for ammonia?
What is the chemical formula for hydrogen peroxide commonly used as an antiseptic?
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 subatomic particle has no electric charge?
What is the chemical formula for baking soda?
Which element is essential for synthesis of haemoglobin and its deficiency causes anaemia?
Which gas has the chemical formula CO2?