Chemistry 1 MCQ Quiz (2025)

In which of the following does the central atom not possess an 'octet' in its outer shell?

• BH₃

• CH₄

• NH₃

• H₂O

Which of the following shows the correct arrangement of decreasing boiling point of the following compounds?

• aq. BeCl₂ aq. KI NH₃ CHCl₃ CCl₄

• aq. KI aq. BeCl₂ CHCl₃ NH₃ CCl₄

• aq. BeCl₂ NH₃ aq. KI CCl₄ CHCl₃

• NH₃ aq. BeCl₂ aq. KI CCl₄ CHCl₃

Which of the following species has a shape based on two lone pairs and two bond pairs?

• NH₃

• NH₂^-

• NH₄ ⁺

• PH₃

Which two formulae correctly represent a pair of structural isomers?

• CH₃CH(CH₃)COOH and (CH₃)₂CHCOOH

• CH₃CH(COOH)CH₃ and (CH₃)₂CHCOOH

• CH₃CHCOOH and CH₃CH₂CH₂COOH

• CH₃CH₂CH₂COOH and (CH₃)₂CHCOOH

The ester ethyl butanoate can be hydrolysed using an excess of dilute sodium hydroxide solution. Which substance is the product of this reaction?

• CH₃CH₃CH₂COONa

• CH₃COONa

• CH₃CH₂ONa

• H₂O

Which of the following statements is correct?

• 2,2-dimethylpropanoic acid is an isomer of prophyl methanoate

• 2-mehtylbutan-2-ol is an isomer of hexan-3-ol

• 3-methylbutan-2-one is an isomer of pentanal

• 3,3-dimethylbutan-2-one is an isomer of petan-3-one

Which of the following compound does exhibit geometric isomerism?

• (Br)₂C=CCl₂

• (CH₃)₂C=CHCH₃

• CH₃ClC=CHCH₃

• CHCl=CCl₂

Which reaction will form propanoic acid?

• Acidic hydrolysis of propyl ethanoate

• Alkaline hydrolysis of ethyl propanoate

• Acidic hydrolysis of propanenitrile

• Acidic hydrolysis of ethanenitrile

Which substance forms propanoic acid as one of the products when it reacts with hot concentrated acidified potassium manganate(VII)?

• But-1-ene

• But-2-ene

• 2-methylpropene

• 2-methylbut-1-ene

What is true of every nucleophile?

• It attacks a double bond

• It donates a lone pair of electrons

• It is a single atom

• It is negatively charged