Chemistry-Objective Related Question Answers
676. First artificial plastic?
Bakelite
677. Bakelite is made from?
Phenol and formaldehyde
678. Plastic will dissolve in?
Chloroform
679. Poisonous gas produced on burning of plastic?
Dioxin
680. Chemical name of Teflon?
Polytetra fluoro ethylene
681. PVC stands for?
Poly Vinyl Chloride
682. The birth place of Rubber?
Brazil
683. Constituent of natural rubber?
Isoprene
684. Rubber is an example of?
Polymer
685. The word 'rubber' was first coined by?
Joseph Priestly
686. Heating rubber with sulphur for the betterment of its properties like tensile strength; hardness; elasticity etc. is called as?
Vulcanisation
687. Vulcanisation was developed by?
Charles Good Year
688. Ordinary rubber is?
Thermoplastic
689. First synthetic rubber?
Neoprene
690. Styrene Butadiene Rubber; Neoprene; Thiokole are the examples of?
Synthetic rubber
691. Rubber is soluble in?
Benzene
692. Structure of Benzene was discovered by:?
August Kekule
693. Cement was invented by?
Joseph Aspidin
694. Mixture of aluminates and silicates of calcium is?
Cement
695. Setting of cement is due to the hydration of calcium silicates and?
Calcium aluminates
696. Setting time of cement is controlled by adding?
Gypsum
697. Sodium hydroxide Used to make?
washing soap
698. Potassium hydroxide Used to make?
toilet soap
699. Olive oil Used to make?
baby soap
700. The process of Extraction of soap from glycerine is?
Salting out
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