alleryStart learning →How many hydrogens bond to each carbon in ethyne?
- Four
- Three
- Two
- One
Show answer and solution
Correct answer: D. One
Each carbon in ethyne uses three valencies in the triple bond and one for hydrogen.
ICSE Class 10 Organic Chemistry: introduction and hydrocarbons — practice questions — page 2
Explore 51 free Organic Chemistry: introduction and hydrocarbons questions in ICSE Class 10 Chemistry. Open each question or exercise to read its content, reference answers and available explanation.
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Showing questions 31–51 of 51.
How many hydrogens bond to each carbon in ethyne?Read the answer and worked solution →Which name fits CH3–CH=CH2?Read the answer and worked solution →Which suffix identifies an aldehyde?Read the answer and worked solution →What is the IUPAC name of a three-carbon ketone?Read the answer and worked solution →Which prefix identifies a chlorine substituent?Read the answer and worked solution →How do alkane boiling points generally change as mass rises?Read the answer and worked solution →Which pair is heated with a sodium carboxylate to make an alkane?Read the answer and worked solution →Heating sodium propanoate with soda lime gives which alkane?Read the answer and worked solution →Hot sodium ethanoate and dry NaOH produce methane and what salt?Read the answer and worked solution →Reducing iodomethane with Zn and dilute HCl forms what?Read the answer and worked solution →Bromoethane forms ethene on heating with which reagent?Read the answer and worked solution →Which pair reacts to prepare ethyne?Read the answer and worked solution →How many HBr molecules must 1,2-dibromoethane lose to form ethyne?Read the answer and worked solution →Complete combustion of methane forms which pair?Read the answer and worked solution →What is the smallest O2 coefficient in 2C2H6 + O2 → 4CO2 + 6H2O?Read the answer and worked solution →Which condition promotes methane's substitution by chlorine?Read the answer and worked solution →One H atom of ethane is replaced by Cl. What organic product forms?Read the answer and worked solution →All four H atoms in CH4 are replaced by Cl. How many HCl form per CH4?Read the answer and worked solution →Which carbon skeleton is branched?Read the answer and worked solution →Which pair differs in double-bond position within the same carbon chain?Read the answer and worked solution →How many carbon atoms form benzene's ring?Read the answer and worked solution →
Worked practice questions
Which name fits CH3–CH=CH2?
- Propyne
- Butene
- Propene
- Propane
Show answer and solution
Correct answer: C. Propene
A three-carbon hydrocarbon with a double bond is propene.
Which suffix identifies an aldehyde?
- -ene
- -ol
- -one
- -al
Show answer and solution
Correct answer: D. -al
Aldehydes use the suffix -al, as in propanal.
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