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Chlorine and sodium
Sodium hydroxide and chlorine
Chlorine and hydrogen
Sodium hydroxide and oxygen
Permanent - hardness of water may be removed by addition of
Permanent hardness of water is due to the presence of ?
Petroleum consists of a mixture of
Petroleum is a mixture of
pH scale ranges from
pH value between 6.5-7.5 makes the soil
Philosophers wool is chemically
Photo chemical smog is a resultant of the reaction among
Piped Natural Gas (PNG) is used for
Plastic is a type of