A) Due to an increase in nuclear charge B) Due to a decrease in nuclear charge. C) Due to the addition of new shells. D) Both A and C
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A)Radius B) Circumference C) Diameter D) Centre
A) Johann Wolfgang Döbereiner B) Dmitri lvanovich Mendeléev C) John Newlands D) Albert Einstein
A) The food is not cooked completely B) The fuel is not burning completely C) The fuel is wet D) The fuel is burning completely
A) Sodium chloride B) Sodium acetate C) Ammonium nitrate D) None of the above
This substance is sweet-smelling and is used in making perfumes and flavoring agents. It is called?
A) Sodium ethanoate B) Lime water C) Hydrogencarbonates D) Ester
A) Acetic acid B) Sulphuric acid C) Sodium Ethoxide D) Ethyne
A) Denatured alcohol is when dyes are added to color the alcohol blue to avoid misuse. B) Intake of methanol in very small quantities can cause death. C) Ethanol is an important industrial solvent. D) All of the above
A) Propanol B) Butane C) Ethanol D) Methanol
A) Catalysts B) Hydrocarbons C) Oxidising agents D) Substitutes
A) It is formed by the replacement of one or more hydrogen atoms by another element. B) It gives some specific properties to the compound so formed. C) Chlorine and Oxygen are examples of heteroatoms. D) All of the above
A) Tetravalent compounds B) Structural isomers C) Covalent compounds D) None of the above
A) Saturated compounds B) Unsaturated compounds C) Reactive compounds D) None of the above
A) Ability to form bonds with other atoms, leading to large chains of molecules. B) Ability to conduct electricity. C) Ability to have different types of allotropes. D) All of the above
A) C-59 B) C-60 C) C-61 D) C-69
I. It is a form of carbon. II. Each carbon atom is bonded to three other carbon atoms in the same plane giving a hexagonal structure. III. It is one of the hardest known substances. A) Only I B) Only III C) Only ...
A) Due to the presence of charged particles. B) Due to the absence of charged particles. C) Due to the presence of a triple bond. D) None of the above
A) Covalently bonded molecules have strong bonds with each other. B) The intermolecular forces between covalently bonded molecules are weak. C) Covalently bonded molecules have weak bonds with each other. D) The intermolecular forces between covalently bonded molecules are strong.
A) Covalent bonds B) Ionic bonds C) Weak bonds D) None of the above
