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Al and Si are ballast element that is they are present in huge amount but plants can grow without them.
Which type of fire extinguisher is used for petroleum fire?
Which one of the following elements is used in the manufacture of fertilizers?
Chemical name of bleaching powder is
Which one of the following contributes largely to the greenhouse effect?
Which one of the following is not a greenhouse gas?
When Hydrogen starts burning in air it produces?
Which of the following is the major constituent of LPG?
The electronic configuration of an atom having atomic number 20 is
The most reactive among the halogens is
When water itself combines chemically with some element or mineral it is called
