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245 questions found · practise this subject as a set Show 20 · 50 per page
#QuestionSubject and topicDifficulty
101 What is the IUPAC name of [Co(NH₃)₆]Cl₃? Chemistry
IUPAC nomenclature		 Easy
102 Which ending is used for the name of the metal when the complex is an anion? Chemistry
IUPAC nomenclature		 Easy
103 What is the IUPAC name of K₃[Fe(CN)₆]? Chemistry
IUPAC nomenclature		 Medium
104 What is the correct formula for tetraamminediaquacobalt(III) chloride? Chemistry
IUPAC nomenclature		 Medium
105 What is the IUPAC name of [CoCl₂(en)₂]Cl? Chemistry
IUPAC nomenclature		 Hard
106 Which type of isomerism is shown by [Co(NH₃)₅(NO₂)]Cl₂ and [Co(NH₃)₅(ONO)]Cl₂? Chemistry
Isomerism		 Easy
107 Which complex shows cis–trans (geometrical) isomerism? Chemistry
Isomerism		 Easy
108 [Co(NH₃)₅(SO₄)]Br and [Co(NH₃)₅Br]SO₄ give different ions in solution. What type of isomers are they? Chemistry
Isomerism		 Medium
109 Which complex is optically active? Chemistry
Isomerism		 Medium
110 Why is trans-[PtCl₂(en)₂]²⁺ optically inactive while the cis isomer is optically active? Chemistry
Isomerism		 Hard
111 In an octahedral crystal field, which set of d orbitals is lower in energy? Chemistry
Bonding: VBT and CFT		 Easy
112 Which ligand produces the strongest crystal field splitting? Chemistry
Bonding: VBT and CFT		 Easy
113 What is the hybridisation and magnetic behaviour of [Ni(CN)₄]²⁻? Chemistry
Bonding: VBT and CFT		 Medium
114 For a d⁴ ion in an octahedral field, what is the electron configuration when Δo is greater than the pairing e… Chemistry
Bonding: VBT and CFT		 Medium
115 What is the spin-only magnetic moment of [CoF₆]³⁻? Chemistry
Bonding: VBT and CFT		 Hard
116 Which metal is present in chlorophyll? Chemistry
Metal carbonyls and applications		 Easy
117 What is the shape of [Ni(CO)₄]? Chemistry
Metal carbonyls and applications		 Easy
118 In synergic bonding in metal carbonyls, into which orbitals of CO does the metal donate electron density? Chemistry
Metal carbonyls and applications		 Medium
119 Which coordination compound is used in the treatment of some types of cancer? Chemistry
Metal carbonyls and applications		 Medium
120 How is EDTA used to estimate the hardness of water? Chemistry
Metal carbonyls and applications		 Hard
121 Which compound is an allylic halide? Chemistry
Classification, nomenclature and the C–X bond		 Easy
122 What is the IUPAC name of (CH₃)₃CBr? Chemistry
Classification, nomenclature and the C–X bond		 Easy
123 CH₃CHCl₂ is classified as a: Chemistry
Classification, nomenclature and the C–X bond		 Medium
124 Which carbon–halogen bond has the highest bond enthalpy? Chemistry
Classification, nomenclature and the C–X bond		 Medium
125 Why is benzyl chloride (C₆H₅CH₂Cl) placed in the sp³ C–X category while chlorobenzene is placed in the sp² C–… Chemistry
Classification, nomenclature and the C–X bond		 Hard
126 Which reagent is preferred for converting an alcohol into an alkyl chloride? Chemistry
Preparation and physical properties		 Easy
127 Which reaction converts bromoethane into iodoethane? Chemistry
Preparation and physical properties		 Easy
128 Arrange CH₃Cl, CH₃Br and CH₃I in order of increasing boiling point. Chemistry
Preparation and physical properties		 Medium
129 Which isomer of C₄H₉Br has the lowest boiling point? Chemistry
Preparation and physical properties		 Medium
130 Propene reacts with HBr in the presence of benzoyl peroxide. What is the major product? Chemistry
Preparation and physical properties		 Hard
131 Which haloalkane reacts fastest by the SN2 mechanism? Chemistry
Chemical reactions		 Easy
132 What is the major product when 2-bromobutane is heated with alcoholic KOH? Chemistry
Chemical reactions		 Easy
133 Which product is mainly formed when an alkyl bromide reacts with AgCN? Chemistry
Chemical reactions		 Medium
134 The rate of hydrolysis of (CH₃)₃CBr in aqueous solution does not change when the hydroxide ion concentration … Chemistry
Chemical reactions		 Medium
135 Why is chlorobenzene much less reactive than chloroethane towards nucleophilic substitution? Chemistry
Chemical reactions		 Hard
136 Which molecule contains a chiral carbon atom? Chemistry
Stereochemistry		 Easy
137 Why is a racemic mixture optically inactive? Chemistry
Stereochemistry		 Easy
138 What stereochemical result is expected when optically active 2-bromobutane reacts with OH⁻ by the SN2 mechani… Chemistry
Stereochemistry		 Medium
139 An optically active tertiary halide undergoes hydrolysis by the SN1 mechanism. What is the main stereochemica… Chemistry
Stereochemistry		 Medium
140 How do two enantiomers of 2-bromobutane differ from each other? Chemistry
Stereochemistry		 Hard
141 Why is chloroform stored in closed, dark-coloured bottles filled to the brim? Chemistry
Polyhalogen compounds		 Easy
142 What is the chemical formula of iodoform? Chemistry
Polyhalogen compounds		 Easy
143 Why was iodoform once used as an antiseptic? Chemistry
Polyhalogen compounds		 Medium
144 Why are freons harmful even though they are non-toxic and unreactive at ground level? Chemistry
Polyhalogen compounds		 Medium
145 Why does DDT become more concentrated in animals higher up a food chain? Chemistry
Polyhalogen compounds		 Hard
146 Which of these is a tertiary alcohol? Chemistry
Classification and nomenclature		 Easy
147 What is the IUPAC name of anisole, C₆H₅OCH₃? Chemistry
Classification and nomenclature		 Easy
148 What is the common name of benzene-1,3-diol? Chemistry
Classification and nomenclature		 Medium
149 Why is the C–O bond in phenol shorter than the C–O bond in methanol? Chemistry
Classification and nomenclature		 Medium
150 Why is the C–O–C bond angle in dimethyl ether slightly larger than the tetrahedral angle? Chemistry
Classification and nomenclature		 Hard