Chemistry Quiz
Chemistry #ChemistryMcqs #PPSC #FPSC
- How many acidic hydrogen atoms are there in propyne?
a) 1
b) 3
c) 4
d) zero - Which of the following has a +M effect?
a) NO2
b) NH2
c) CHO
d) CN - m-nitrophenol is about 100 times more acidic than phenol due to
a) Steric effect
b) Resonance effect
c) Solvent effect
d) Inductive effect - Which isomerism is not exhibited in alkene?
a) Geometrical
b) Metamerism
c) Chain isomerism
d) Position isomerism - No of conjugated electrons in pyridine?
a) Zero
b) 6
c) 8
d) 5
edexmylms #edexmy
- Which of the following is the most basic
a) NH3
b) H20
c) CH3NH2
d) CH3OH - Which of the following is not conjugated unsaturated system.
a) Allyl radical
b) Allyl cation
c) 1,3-butadiene
d) 1-penten-4-yne - Which one is not conjugated molecule? Hint Draw structure!
a) Cyclohexene
b) Acetamide
c) Phenol
d) benzene - which acid is strongest?
a) CH3COOH
b) ClCH2COOH
c) F3CCOOH
d) Cl3CCOOH - Which of the following is a temporary effect brought into play at the requirement of attacking reagent?
a) Inductive effect
b) Mesomeric effect
c) Electromeric effect
d) Inductomeric effect - Select the correct statement from the following option.
a) Conjugate effect is stronger than (-I) effect
b) Conjugate effect is weaker than (-I) effect
c) Conjugate effect is same as (-I) effect
d) None of the mentioned - Those groups which are electron repelling and have lesser electron attracting power than hydrogen show
a) (+E) effect
b) (-E) effect
c) (-I) effect
d) (+I) effect - Which of the following show cis trans isomerism?
a) 1-butene
b) 2-butene
c) Ethene
d) All of these - if the position of the functional group varies in each of its isomers then it is
a) Position isomerism–
b) Functional group isomerism
c) Chain isomerism
d) None of the above - which one is not an isomer of butanone?
a) 2,3-epoxybutane
b) ethyl vinyl ether
c) 1,2-butanol
d) ter-butyl ether - Ethanol and acetone are
a) Position isomers
b) Chain isomers
c) Metamers
d) None of the above - Which of the following is a tautomer of phenol?
- In keto-enol from the presence of which type of hydrogen is a must?
a) Alpha
b) Beta
c) Gamma
d) Any position of hydrogen - How many isomeric alkanes of the molecular formula C5H12 are there?
a) 1
b) 2
c) 3
d) 4 - How many alcohols are structural isomers with the formula: C5H11OH?
a) 5
b) 6
c) 7
d) 8 - Which of the following does NOT exhibit geometric isomerism? (Hint: draw them!)
a) 4-octene
b) 2-pentene
c) 3-hexene
d) 1-hexene
21.Hyperconjugation involves the delocalisation of __
a) σ bond orbital
b) π bond orbital
c) Both σ and π bond orbital
d) None of the mentioned
- larger the number of hyperconjugation structures, the stability of free radicals will __
a)Increase
b)Decrease
c) Remains same
d) None of the mentioned - When the contributing structure contains the same number of two-electron bonds as the normal lewis formula, it will be __
a) Heterovalent hyperconjugation
b) Sacrificial hyperconjugation
c) isovalent hyperconjugation
d) All of the mentioned - Ethene is devoid of any alpha hydrogen so hyperconjugation is not possible.
a) True
b) False
c) not known
d) both
