GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Hydrogen and Oxygen
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water
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Either A or B
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None of the above
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Detailed explanation-1: -The actual reaction to make water is a bit more complicated: 2H2 + O2 = 2H2O + Energy. In English, the equation says: To produce two molecules of water (H2O), two molecules of diatomic hydrogen (H2) must be combined with one molecule of diatomic oxygen (O2).
Detailed explanation-2: -The arrow in a chemical reaction means the direction in which the reaction occurs. If we use the scientific names of the elements of the equation, it would look something like this. Here we can see that hydrogen and Oxygen are the reactants, and they combine to form a chemical compound H2O, i.e., water.
Detailed explanation-3: -Synthesis reactions occur when two or more reactants combine in order to form a singular product. In this case, the 4 hydrogen atoms in the 2 hydrogen gas molecules (H2 ) combine with the 2 oxygen atoms in the 1 molecule of oxygen gas (O2 ). In doing this, only one product, water or H2O H 2 O, is formed.