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Chemistry 1488 MCQs [All-Courses]

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oost your exam preparation with our Chemistry MCQs designed for PPSC, FPSC, NTS, OTS, PTS, AJKPSC, BPSC, KPPSC, PMS, CSS, and all competitive exams.
Our content covers Basic Chemistry, Atomic Structure, Periodic Table, Chemical Reactions, Acids & Bases, Organic Chemistry, and everyday chemical concepts.

All Topics  1488

The acetylene molecule contains:___________?
A 5 sigma bonds
B 4 sigma and 1 pi bonds
C 3 sigma and 2 pi bonds
D 2 sigma and 3 pi bonds
Correct Answer: 3 sigma and 2 pi bonds
Why does Ethyl Alcohol show high boiling point then Acetone?
A Due to Hydrogen bonding
B Due to high molecular weight
C Due to its Acidic nature
D Due to its Low molecular weight
Correct Answer: Due to Hydrogen bonding
Identify the unsaturated compound that does not give red ppts when treated with____________Ammonical cuprous chloride
A CH3-CH2-CCH (1-Butyne)
B CH3-CCH(1-Propyne)
C CH3-CH2-CH2CCH(1-Pentyne)
D CH2=CH2
Correct Answer: CH2=CH2
Why do we determined the boiling point of a liquid?
A To check its Acidity and Basicity
B To Check temperature
C To check its Purity and nature
D None of These
Correct Answer: To check its Purity and nature
In the presence of Zn, Hydrolysis of ozonide of 1-butene gives:_____________?
A Ethylene only
B Acetaldehyde and Formaldehyde
C Propionaldehyde and Formaldehyde
D Acetaldehyde only
Correct Answer: Propionaldehyde and Formaldehyde
An organic compound has a triple bond and not double bond. It can be tested by __________?
A Bromine water
B Bayer’s reagent
C Fehling solution
D Ammonical silver nitrate
Correct Answer: Ammonical silver nitrate
The Chemical Formula of Sand is___________?
A Si2O3
B SiO2
C Al2O3
D Sr2O
Correct Answer: SiO2
Which of the following has acidic hydrogen?
A Ethyne
B Ethene
C Ethane
D Benzene
Correct Answer: Ethyne
Benzene gives mainly_________?
A Addition reaction
B Substitution reactions
C Halogenation
D All of these
Correct Answer: Substitution reactions
Product formed when 2-pentyne reacts with ozone in the absence of Zinc is __________?
A CH3CH2CHO + CH3CHO
B CH3CH2CHO + CH3COOH
C CH3CH2COOH + CH3COOH
D CH3COOH + CO2
Correct Answer: CH3CH2COOH + CH3COOH
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