Adaptive Practice
Chemical Formulae and Equations
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Question 1 of 10
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Easy
What is the chemical formula of water?
Medium
Which of the following represents a balanced chemical equation for the reaction between hydrogen and oxygen to form water?
Easy
What is the chemical formula of calcium carbonate, commonly found in Indian marble?
Medium
In the reaction: 2Mg + O2 → 2MgO, what is the ratio of magnesium atoms to oxygen atoms in the product?
Easy
Which of the following is the correct chemical formula for ammonia, a compound used in Indian fertilizers?
Medium
What does the equation 2H2 + O2 → 2H2O represent?
Medium
In the reaction: Zn + 2HCl → ZnCl2 + H2, what type of reaction is taking place?
Hard
Which of the following is the balanced chemical equation for the decomposition of potassium chlorate (KClO3) to potassium chloride (KCl) and oxygen (O2)?
Medium
What is the mole ratio of reactants in the combustion of methane: CH4 + 2O2 → CO2 + 2H2O?
Easy
Which of the following statements is true about a balanced chemical equation?