At least how many types of organisms inhabit the earth? The measure of the variety of organisms present in different ecosystems is called what? How many types of plants are known to biologists? Biological classification is a method by which whom divide orgnisms into groups and subgroups? Polyethene is prepared by the polymerization of Which gas is evolved when NaOH is heated with? NH3Cl NaHCO3 is nearly insoluble in the solution of NH4Cl at? The common name of sodium hydrogen carbonate is? Raw material for the preparation of stamp pad ink is?
The aqueous solution of Na2 CO3 Changes blue litmus red? Detergents when dissolved in water reduce the intermolecular attractive forces between water molecules? China clay or BaSO4 are used as fillers to the pigments? The process of preparation of soap from fat is called saponification? Polyethen is an example of thermoplastic. Polyethene is prepared by the ________ of ethene under high pressur? PVC is prepared by the polymerization of ________ in an autoclave? Polystyrene is prepared by the polymerization of styrene in the presence of ________?
All detergents contain polar group-SO3Na? PVC is prepared by the polymerization of ethane (CH2=CH2)? Turpentine oil is used in shoe polish to prevent it from drying? Vinyl chloride is used in the manufacture of bakelite? Chemical formula of Caustic soda is By heating lime stone (CaCO3 ) following gas is obtained? The original product obtained in the solvey's process is? Which salt is added to the soap and glycerine mixture? The compound used as a thinner in the preparation of paint is? Spirit varnish is such a type of varnish in which ________ liquid is used as a solvent for resin? NaOH is produced commercially by the electrolysis of brine in a mercury cell?