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P-1 Carbon Compounds · Maharashtra Board STD 10 (MSBSHSE - English Medium). 30 questions.

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Question 11 Mark
True or False : When Unsaturated carbon compounds burn, they give a clean oxidizing flame with lots of black carbon.
Answer
False. When unsaturated carbon compounds burn, they give yellow flame with lots of black carbon.
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Question 21 Mark
True or False : Two pairs of electrons are shared between two nitrogen atoms to form a nitrogen molecule.
Answer
False. Three pairs of electron are shared between two nitrogen atoms to form a Nitrogen molecule.
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Question 41 Mark
True or False : The atom of the element which is substitute for hydrogen is referred as hetero atoms.
Answer
True
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Question 51 Mark
True or False : Saturated hydrocarbons burn with smoky flame.
Answer
False. Saturated hydrocarbon burns with non-smoky flame.
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Question 81 Mark
True or False : Generally most of the carbon compounds are found to be good conductors of electricity.
Answer
False. Generally most of the carbon compounds are found to be bad conductor of electricity.
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Question 91 Mark
True or False : Ethanoic acid reacts with a base like sodium hydroxide to form sodium ethanoate and water.
Answer
True
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Question 101 Mark
True or False : Covalent compounds have high melting and boiling points.
Answer
False. Covalent compound have low melting and boiling points
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Question 211 Mark
Name the Following : The functional group in ether and halogen.
Answer
Functional groups:
Ether: - O -
Halogen: - X $\left(-\mathrm{Cl}_t-\mathrm{Br}_2-\mathrm{l}\right)$.
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Question 241 Mark
Name the Following : $CH _3- CO - CH _2- CH _3$
Answer
Number of carbon atoms in the longest chain: 4
Parent alkane: Butane Functional group: -CO- (one)
Assign the number:
Image

In the longest chain, the numbering of carbon atom starts from the carbon atom nearest to the function group.
If the carbon chain of the compound contains a (-CO-) group, then change the ending of the parent name, i.e., ' $e$ ' of butane is replaced by 'one'.
Parent suffix: Butan-2-one
IUPAC name: Butan-2-one

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Question 251 Mark
Name the Following : $CH _3- CHOH - CH _3$
Answer
The number of carbon atoms in the longest chain: 3
Image

Parent alkane: Propane
Functional group: $- OH$ (ol)
Assign the number: 2
The carbon atom to which the $- OH$ group is attached is numbered as $C _2$. If the carbon chain of the compound contains a $- OH$ group then change the ending of the parent name, i.e., ' $e$ ' of propane is replaced by 'ol'. (ol stands for alcohol)
Parent suffix: Propan-2-ol
IUPAC name: Propan-2-ol

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Question 261 Mark
Name the Following : $CH _3- CHO$
Answer
Number of carbon atoms: 2
Parent alkane: Ethane
Functional group: - $CHO ( al )$
If the carbon chain of the compound contains a $- CHO$ group, then change the ending of the parent name, i.e., 'e' of ethane is replaced by 'al'.
Parent suffix: Ethanal
IUPAC name: Ethanal
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Question 271 Mark
Name the Following : $CH _3- CH _2- NH _2$
Answer
Number of carbon atoms: 2
Parent alkane: Ethane
Functional group: $- NH _2$ (amine)
If the carbon chain of the compound contains a $- NH _2$ group, then change the ending of the parent name, i.e., ' $e$ ' of ethane is replaced by 'amine'.
Parent suffix: Ethanamine
IUPAC name: Ethanamine.
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Question 281 Mark
Name the Following : $CH _3- CH _2- COOH$ (Practice Activity Sheet – 3)
Answer
The number of carbon atoms in the longest chain: 3
Parent alkane: Propane
Functional group: - $COOH$ (-oic acid)
If the carbon chain of the compound contains a $- COOH$ group then change the ending of the parent name, i.e., ' $e$ ' of propane is replaced by 'oic acid'.
Parent suffix: Propanoic acid
IUPAC name: Propanoic acid
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Question 291 Mark
Name the Following : $CH _3- CH _2- CH _2- CH _3$
Answer
The number of carbon atopic in the longest chain: 4
Parent alkane: Butane IUPAC name: n-Butane
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Question 301 Mark
Name the Following : A nomenclature system based on the structure of the compounds and it was accepted all over the world.
Answer
International Union of Pure and Applied Chemistry (IUPAC).
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