CARBON AND ITS COMPOUNDS-Structural Isomerism

 Structural Isomerism

01.	How are structure of (i) and (ii) given below related to one another ? Give reason to justify your answer. Structure I - (CH3)3 CH –CH – (CH3)2 Structure II – (CH3)3C – CH2 – CH3 Draw one possible structure for above case.	2023
02.	Draw two structural isomers of butane.	2023 2022
03.	a)     How many isomers are possible for the compound with the molecular formula C4H8 ? Draw the electron dot structure of branched chain isomer. b)    How will you prove that C4H8 and C5H10 are homologous ?	2022 SP
04.	You have two carbon compounds with the molecular formula C3H6O. Name two compounds with this formula and also draw their structural formula.	2023
05.	What are isomers ? Write the structures of two compounds having molecular formula C3H6O and give their names.	2023
06.	What are structural isomers ? Write the structure of two isomers of butane ?	2024
07.	Draw two different possible structures of a saturated hydrocarbon having four carbon atoms in its molecule. What are these two structure of the hydrocarbon having same molecular formula called ? Write the molecular formula and the common name of this compound. Also write the molecular formula of its alkyne.	2022
08.	(i)                A compound with molecular formula C3H6O has two isomers. a)     Draw the structure of both the isomers. b)    Write their functional group. (ii)             Why are the compounds of carbon exceptionally stable ?	2022
09.	a)     What are Structural Isomers ? Draw the structure of two isomers of butane(C4H10). b)    Write the molecular formula of (i) Cyclohexane and (ii) Benzene	2022
10.	a)     What are structural isomers ? Draw the structure of two isomers of butane C4H10 . Explain with the help of structures why we cannot have isomers of propane.	2022

11.	Define Isomerism. Draw all possible isomers of butane.	2020
12.	What are structural isomers ? List any four characteristics of isomers. Draw the possible structures of butane.	2019
13.	What are structural isomers ? Why are isomers of first three members of alkane series are not possible ? Write the all possible structures of isomers of fourth members of this series.	2017
14.	a)     Define the term ‘isomer’. b)    Two compounds have same molecular formula C3H6O. Write the name of these compounds and their structural formula.	2019
15.	a)     Define the term ‘isomer’ b)    Draw two possible isomer of the compound with molecular formula C3H6O and write their names. c)        Give the electron dot structure of the above two compounds.	2013
16.	You are given balls and stick model of six carbon atoms and fourteen hydrogen atoms and sufficient number of sticks. In how many ways one can join the models of six carbon atoms and fourteen hydrogen atom to form different molecules of C6H14.	2018 SP
17.	Draw the structural formula of all the formula of all the possible isomers of the compound with the molecular formula C3H6O and also give their electron dot structure.	2018 SP
18.	What are isomers ? “Isomers of the first three members of alkane series are not possible.’’ Give reason to justify the statement and draw the structure of two isomers of butane, C4H10.	2017 SP
19.	What is meant by isomers ? “We can not have isomers of the first three members of alkane series” give reason to justify your statement. Draw the structure of two isomers of pentane C5H12.	2016 SP
20.	An aldehyde as well as ketone can be represented by the same molecular formula, say C3H6O. Write their structures and name them. State the relation between the two in the language of science.	2015 2016

CARBON AND ITS COMPOUNDS– Versatile Nature of Carbon

 CARBON AND ITS COMPOUNDS

Carbon Properties
01.	What are the two properties of Carbon which lead to the huge number of Carbon compounds we see around us ?
02.	Carbon(Group 14) element in the periodic table is known to form compounds with many elements. Write an example of a compound formed with a.Chlorine (Group 17 of periodic table)      b.Oxygen (Group 16 of periodic table)
03.	Carbon can neither form C4+ cation nor C4- anions. Why ?	2023
04.	Give reason why carbon can neither form C4+ cations nor C4- anions but form covalent compounds.	2024
05.	List two properties by virtue of which carbon form a large number of compounds.	2024
06.	State reasons why 1.Carbon forms strong bonds and stable compounds with most other elements 2.The melting and boiling points of covalent compounds are low.	2023
07.	Carbon compounds have low melting and boiling points ?	2022
08.	“Carbon prefers to share its valence electrons with other atoms of carbon or with atoms of other elements rather than gaining or losing the valence electrons in order to attain noble gas configuration.” Give reason to justify this statement.	2022
09.	State the reason why a)     Carbon compounds have low melting and boiling points. b)       Carbon compounds do not conduct electricity c)     Carbon can form only covalent compounds.	2022
10.	‘Two different forms of carbon – diamond and graphite have different structures and very different physical properties even though their chemical properties are same.” Explain why	2022
11.	State the reasons, why carbon cannot (i)                Lose four electrons to form C4+ cations (ii)             Gain four electrons to form C4- anions.	2022

	How does carbon overcome this problem to form compounds ?
12.	Write the name of an allotrope of carbon.	2021
13.	‘Carbon forms strong bond with most other elements making the compounds exceptionally stable.” Give reason to justify this statement.	2021
14.	The table shows the electronic structure of four elements. a.Identify which element(s) will form covalent bond with carbon. b.“Carbon reacts with an element in the above table to form several compounds.” Give suitable reasons.	2022 SP
15.	List two properties of carbon which lead to the huge number of carbon compounds we see around us, giving reason for each.	2019
16.	a.State the reason why carbon can neither form C4+ cations nor C4- anions, but forms covalent bonds. Also state reasons to explain why covalent compounds i.Are bad conductors of electricity ii.Have low melting and boiling points.	2019
17.	Give reason why carbon can neither form C4+ cations nor C4- anions, but forms covalent compounds which are bad conductor of electricity and have low melting and boiling points ?	2017
18.	Expalin, giving reason, why carbon neither forms C4+ cations nor C4- anions, but forms covalent compounds which are bad conductor of electricity and have low melting and boiling point.	2017
19.	Explain the reason why carbon forms compounds mainly by covalent bonds. State two main reasons responsible for carbon making a large number of compounds. Also explain why compounds formed by carbon with most other elements are exceptionally stable.	2017
20.	a.State two main reasons for carbon forming a very large number of compounds. b.Give reason why carbon forms compounds. i. Namely by covalent bonding ii.Have low melting and boiling points.	2017 SP
Catenation
01.	Catenation is the ability of an atom to form bonds with other atoms of the same element. It is exhibited by both carbon and silicon. Compare the ability of catenation of the two elements. Give reasons.

02.	Carbon, a member of group 14, forms a large number of carbon compounds estimated to be about three million. Why is this property not exhibited by other elements of this group ? Explain	2020
03.	State any two reasons for carbon forming a large number of compounds. Why does carbon form compounds i.Mainly by covalent bonding ii.Having low melting and boiling points.	2020
04.	Why does carbon show catenation to maximum extent ? List two reasons.	2020
05.	The number of carbon compounds is more than those formed by all other elements put together. Justify this statement by giving two reasons.	2021 SP
06.	Define Catenation.	2020 SP
Tetravalency
01.	Carbon has four electorn in its valence shell. Which type of compound can be formed by carbon and why ? Give any one example of such compound.	2018