Will the substitution method always work?

Will the substitution method always work?
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No, it will not.There are some expressions for which noanalytical solution exists.
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A point mutation results from (A) Substitution of a base (B) Insertion of a base (C) Deletion of a base (D) All of these

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Substitution of an adenine base by guanine in DNA is known as (A) Transposition (B) Transition (C) Transversion (D) Frameshift mutation

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The most likely lethal mutation is (A) Substitution of adenine for cytosine (B) Insertion of one nucleotide (C) Deletion of three nucleotides (D) Substitution of cytosine for guanine

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Which one of the following causes frame shift mutation? (A) Transition (B) Transversion (C) Deletion (D) Substitution of purine to pyrimidine

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Give the example for electrophilic substitution reaction ?

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Consider the following statements: 1. Caffeine, a constituent of tea and coffee is a diuretic 2. Citric acid is used in soft drinks. 3. Ascorbic acid is essential for the formation of bones and teeth. 4. Citric Acid is a good substitution for ascorbic acid in our nutrition. The correct statement(s) is/are: (a) 1 and 2 only (b) 1, 2 and 3 only (c) 3 and 4 only (d) 1, 2, 3 and 4

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Devaluation of currency leads to - (1) expansion of export trade (2) contraction of import trade (3) expansion of import substitution (4) All of the above

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Last Answer : (4) All of the above Explanation: Devaluation in modern monetary policy is a reduction in the value of a currency with respect to those goods, services or other monetary units with which ... deficit. Import substitution means promotion of export to replace imports. It is also fallout of devaluation.

"Globalisation of Indian Economy" denotes : (1) Increase of external borrowings (2) having minimum intervention in economic relations with other countries (3) starting of new business units abroad (4) relaxing the programmes of import substitution

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Last Answer : (2) having minimum intervention in economic relations with other countries Explanation: Globalization means integrating the economy of a country with the economies of other countries or world economy ... of a plethora of export incentives opting for exchange rate adjustments for promoting exports.

Benzene cannot undergo – (1) Substitution (2) Addition (3) Elimination (4) Oxidation

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Last Answer : (3) Elimination Explanation: Benzene can not undergo Elimination reaction.

Adding Cl2 to benzene in the presence of AlCl3 is an example of – (1) Elimination reaction (2) Substitution reaction (3) None of the options (4) Addition reaction

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Last Answer : (2) Substitution reaction Explanation: The reaction between benzene and chlorine in the presence of a catalyst such as aluminium chloride gives Chlorobenzene. This reaction is an example of electrophilic substitution ... since one of the hydrogen atoms on the ring is replaced by a chlorine atom.

Why does benzene undergo electrophilic substitution reactions easily and nucleophilic substitutions with difficulty?

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How can tri substitution of Bromine be prevented in aniline ? OR How can we prepare mono bromo aniline ?

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Phenols do not undergo substitution of the — OH group like alcohols. Explain.

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How an — OH group attached to carbon in the benzene ring activates benzene towards electrophilic substitution ?

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Last Answer : The lone pair of electrons present on oxygen atom enter into resonance with the benzene ring. As a result, the electron density becomes higher at o- and p- position and due to higher electron density, the ring gets activated towards electrophilic substitution.