ENVIRONMENTAL CHEMISTRY FILL IN THE BLANKS Q.01: Fill in the blanks: (i) Only _______ of the total earth’s water resources are available as fresh water. (1%) (ii) ________ is a smaller unit of biosphere which consists of community of organisms…
COMMON CHEMICAL INDUSTRIES IN PAKISTAN FILL IN THE BLANKS Q.01: Fill in the blanks: (i) Fertilizers enhance the natural___________ of the soil. (fertility) (ii) Micro-nutrients are required in quantity ranging from ________ per acre. (6—200 g) (iii) Ammonia contains ________…
MACROMOLECULES FILL IN THE BLANKS Q.01: Fill in the blanks: (i) Macromolecules are built up from small units called _______. (monomer) (ii) Nylon is a polyamide and terylene is a ________. (polyester) (iii) Nylon is prepared by the reaction of…
CARBOXYLIC ACIDS FILL IN THE BLANKS Q.01: Fill in the blanks: (i) Formula of malonic acid is __________. (HOOC–CH2–COOH) (ii) Methyl nitrile upon acidic hydrolysis produces ________. (acetic acid) (iii) Melting points of carboxylic acids containing even number of carbon…
ALDEHYDES AND KETONES FILL IN THE BLANKS Q.01: Fill in the blanks: (i) Aldehydes are the first oxidation product of _________. (primary alcohols) (ii) Ketones are the first oxidation product of __________. (secondary alcohols) (iii) Aldehydes and ketones undergo ________…
ALCOHOLS, PHENOLS & ETHERS FILL IN THE BLANKS Q.01: Fill in the blanks: (i) Primary, secondary and tertiary alcohols can be identified by _______ test. (Lucas) (ii) Oxidation of ________ alcohols give ketones. (secondary) (iii) Alcohols on heating with ________…
ALKYL HALIDES FILL IN THE BLANKS Q.01: Fill in the blanks: (i) In tertiary alkyl halides the halogen atom is attached to a carbon which is further attached to ______ carbon atoms directly. (three) (ii) The best method for the…
AROMATIC HYDROCARBONS FILL IN THE BLANKS Q.01: Fill in the blanks: (i) The term aromatic was derived from Greek word ________ meaning ________. (aroma, fragrant) (ii) Aromatic hydrocarbons include benzene and all those compounds which are _________ related to benzene.…
ALIPHATIC HYDROCARBONS FILL IN THE BLANKS Q.01: Fill in the blanks: (i) Ozone reacts with ethene to form ______. (ethylene ozonide) (ii) Lindlar’s catalyst is used for _______ of alkynes. (partial hydrogenation) (iii) Divinyl acetylene is a _________ acetylene. (polymer…
FUNDAMENTAL PRINCIPLES OF ORGANIC CHEMISTRY FILL IN THE BLANKS Q.01: Fill in the blanks: (i) Organic compounds having same molecular formula but different ______ are called isomers. (structure) (ii) The state of hybridization of carbon atom in ______ is sp2.…