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The correct answer is D
The gas usually causing explosions in coal mines is-
The acid used in lead storage cells is-
Which one amongst the following is not a Green House gas?
The pH of a neutral solution is —
Petroleum is a mixture of-
The chemical name of'Common salt’
The element used in the manufacture of safety matches is —
Milk tastes sour when kept in the open for sometimes due to the formation of-
The fuel that is used in modern submarines is -
Which of the following is a physical change?
