Question 41

One of the following reactions illustrates the formation of coordinate covalent bond?

A Be + 2F2 → BeF2

B NaOH + HCl → NaCl+H2O

C CaCO3+ HCl → CaCl2 +H2O +CO2

D NH3 + HCl → NH4+ + Cl-

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Question 42

In the production of NH3 by the Haber process according to the equation N2(g)+3H2(g) ⇌ 2NH3(g) ΔH=-92KJ mol-1 What are the favorable conditions for the production of high yield of NH3?

A High pressure and low temperature

B Low pressure and low temperature

C Low pressure and high temperature

D High pressure and high temperature

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Question 43

Which one of the following statements describes laboratory and industrial preparation of acetic respectively?

A Reduction of ethanol by NaBH4 and fermentation of propanol.

B Reduction of toluene by KMnO4 and reduction of ethanol by sodium dichromate.

C The oxidation of ethanol by sodium dichromate and fermentation of ethanol.

D Oxidation of toluene by KMnO4 and fermentation of ethanol.

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Question 44

One of the following reactions illustrates the formation of coordinate covalent bond?

A Be + 2F2 → BeF2

B NaOH + HCl → NaCl+H2O

C CaCO3+ HCl → CaCl2 +H2O +CO2

D NH3 + HCl → NH4+ + Cl-

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Question 45

In the production of NH3 by the Haber process according to the equation

N₂(g)+3H₂(g) ⇌ 2NH₃(g) ΔH=-92KJ mol^-1

What are the favorable conditions for the production of high yield of NH₃?

A High pressure and low temperature

B Low pressure and low temperature

C Low pressure and high temperature

D High pressure and high temperature

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Question 46

Which one of the following statements describes laboratory and industrial preparation of acetic respectively?

A Reduction of ethanol by NaBH4 and fermentation of propanol.

B Reduction of toluene by KMnO4 and reduction of ethanol by sodium dichromate.

C The oxidation of ethanol by sodium dichromate and fermentation of ethanol.

D Oxidation of toluene by KMnO4 and fermentation of ethanol.

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Question 47

Which of the following is true about carboxylic acids?

A Methanoic, Ethanoic and Citric acids are monocarboxylic acids.

B Carboxylic acid with the formation RCOOH.

C Citric acid is a typical dicarboxylic acid.

D Propanedioic acid is the simplest dicarboxylic acid.

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Question 48

What is the IUPAC name for the branched carboxylic acid: CH₃-CH(Cl)-CH(CH₃)-CH(CH₃)-COOH

A 4-chloro-2, methyl 1-pentanoic acid

B 1, 2-dimethyl-4-chloro 1-pentanoic acid

C 4-chloro-1-methyl-1-pentanoic acid

D 4-chloro-2, 3-dimethyl-1-pentanoic acid

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Question 49

Esters are characterized by the following properties EXCEPT

A esters have lower boiling point compared to the carboxylic acid alcohols

B esters have pleasant odors of perfumes and food flavoring

C esters have higher boiling point than carboxylic acid and alcohol

D all esters are soluble in inorganic solvents and organic

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Question 50

The sanitizer in wide use for protection against Covid-19 is labelled 83% alcohol. How can one scientifically check the concentration?

A experimentation

B forming hypothesis

C making observation

D collection of data

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Chemistry - 2013 E.C (2020/2021) Ethiopian University Entrance Exam (EUEE)

Question 41

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Question 43

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Question 44

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Question 45

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Question 46

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Question 47

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