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Perspex
Styrofoam
Polystyrene
Teflon
Which of the following is used for removing air bubbles from glass during its manufacture?
Which of the following is used to increase the anti-knocking property of petrol ?
Which of the following is used to make light weight, but strong plastic ?
Which of the following is usually not an air-pollutant?
Which of the following leads to artificial rainfall?
Which of the following metals can displace copper from copper sulphate solution ?
Which of the following metals is commonly used to increase the strength of steel alloys?
Which of the following metals is not a pollutant ?
Which of the following of the process is known as nitrification
Which of the following of these acids is not organic in origin