_______ are usually cheap and _______ are much costlier.
Cells, Batteries
Batteries, Cells
_______ covalent bond has electrical poles, and _________ covalent bond does not have electrical poles.
Nonpolar, Polar
Polar, Nonpolar
The rate of reaction in ____ is unimolecular, while ______ is bimolecular.
SN1, SN2
SN2, SN1
______ change is a permanent change, while ______ is a temporary change.
Physical, Chemical
Chemical, Physical
______ is the combination of two or more atoms, and ______ is the smallest particle of an element.
Molecule, Atom
Atom, Molecule
_______ is used in fertilizers and explosives, while ________ is used in food preservatives.
Nitrite, Nitrate
Nitrate, Nitrite
______ is derived from alcohol, ______ is derived from carboxylic acids.
Ether, Ester
Ester, Ether
______ can be primarily found in plants, while _____ can be found in processed food.
Ketose, Aldose
Aldose, Ketose
________ is a poor acid compared with water, while ________ is higher acidic than water.
Ethanol, Methanol
Methanol, Ethanol
________ is also called Lewis acid; ________ is also called Lewis base.
Nucleophile, Electrophile
Electrophile, Nucleophile
________ can be homogeneous mixtures and heterogeneous mixtures; A ________ is a type of homogeneous mixture.
Solution, Mixture
Mixture, Solution
________ are designed for plants, while __________ are designed to kill all types of unwanted elements.
Herbicides, Pesticides
Pesticides, Herbicides
_______ was derived in the 12th century while _______ in the 19th century.
Cholesterol, Fat
Fat, Cholesterol
_______ are known to be less acidic, and ______ are relatively more acidic in nature.
Alcohols, Phenols
Phenols, Alcohols
________ means losing electrons; ________ means gaining electrons.
Reduction, Oxidation
Oxidation, Reduction
Zinc hydroxide is an example of _______. Sodium hydroxide is an example of _______.
Base, Alkali
Alkali, Base
_______ is not a state of matter, unlike _______.
Vapour, Gases
Gases, Vapor
_______ produces less fat while ________ produces more fat.
Glucose, Fructose
Fructose, Glucose
The process of _________ is slow; The process of __________ is much quicker.
Evaporation, Boiling
Boiling, Evaporation
______ are solid at room temperature. Oils are liquid at room temperature.
Oils, Fats
Fats, Oils
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