Hydrocarbons Saturated and Unsaturated hydrocarbon

 Hydrocarbons Saturated and Unsaturated  hydrocarbon

Hydrocarbons
01.	What are hydrocarbons ? Give examples.
02.	What are hydrocarbons ?				2024
03.	a.What is hydrocarbon ? Give its one example. b.Give structural difference between saturated and unsaturated hydrocarbons with two example each.				2019
04.	What are hydrocarbons ? Write the general formula of (i) saturated hydrocarbons, and (ii) unsaturated hydrocarbon and draw the structure of one hydrocarbon of each type. OR How can an unsaturated hydrocarbon be made saturated ?				2017 2013
Saturated Compounds (Alknaes)
1.	Give the structural differences between saturated and unsaturated hydrocarbons with two examples each.
02	List two differences between saturated and unsaturated hydrocarbon.			2020
03.	a)     Name the simplest saturated hydrocarbon. Draw its electron dot structure. Which type of bonds exist in this compound ? b)    Name any two mixture of the carbon compound used as a fuel in daily life, of which the above mentioned compound is an important component. c)     In which homologous series of Carbon compound can this compound be placed ? Write the general formula of the series. d)    Which type of flame is produced on burning it ?			2023
04.	Butane had both Carbon – Carbon bonds as well as Carbon – Hydrogen bonds. Draw its structural formula and state the number of (1) C –H bonds and (2) C – C bonds in it.			2023
05.	Write the name and formula of simplest saturated hydrocarbon. Write the general formula of the homologous series of carbon compounds in which this compounds can be placed. Using this formula, find the 2nd member of this series. Write chemical equation for the reaction when this simplest hydrocarbon burns in air.			2023
06.	(i)   Why are carbon compounds exceptionally stable ?			2023

		(ii)    Differentiate between saturated and unsaturated compounds. Give structures of both the types of compounds having three carbon atom in their molecules.
07.		a)     Write the name and draw the structure of a saturated hydrocarbon with four carbon atoms. b)    Write the number of single covalent bonds present in this compound.		2022
08.		What is methane ? Draw its electron dot structure. Name the type of bonds formed in this compound. Why are such compounds (i)   Poor conductors of electricity ? and (ii)  Have low melting and boiling points ? What happens when this compounds burn in oxygen ?		2019
09.		Why are most carbon compounds poor conductor of electricity ?		2018
10.		What is a saturated hydrocarbon ? Write the formula of any one saturated hydrocarbon.		2017
Unsaturated Compounds(Alkenes, Alkynes)
01.	Draw the electron dot structure of ethyne and also draw its structural formula.
02.	Differentiate between saturated and unsaturated carbon compounds on the basis of their general formula.			2023
03.	Write two points of difference between saturated and unsaturated hydrocarbons giving one example of each. Write the general formula of alkyne series. Wrtie the name and structure of second member of this series.			2017
04.	Give a chemical test to distinguish between saturated and unsaturated hydrocarbons.			2013
05.	Why is the melting and boiling points of C4H8 higher than that of C3H6 or C2H4 ?			2024
06.	Consider the carbon compounds having following molecular formula :  i)    C3H6         (ii) C3H8 (iii) C4H6 (iv) C6H6                 (v) C6H12 a) State the number of double covalent bonds present in C3H6. b) Write the formula of first member of the homologous series to which the carbon compounds of C4H8 belongs. c) Which one of the above compounds forms ring structure of carbon atoms ? d) Identify, Which of the above compounds, is a member of alkane series.			2022
07.	Unsaturated hydrocarbons contain multiple bonds between two carbon atoms and these compounds show addition reactions. Out of saturated and			2019

	unsaturated carbon compounds, which compounds are more reactive ? Write a test to distinguish ethane from ethene.
08.	Which compounds are called (i) alkanes (ii) alkenes and (iii) alkynes ? C4H10 belongs to which of these ? Draw structural isomers of this compound.			2019
09.	The general formula of the organic compounds ‘A’, ‘B’ and ‘C’ is CnH2n. Their boiling points are -162 oC, -42.2 oC, and –0.5oC respectively. Based on this information answer the following : a)     Which types of compound ‘A, ‘B’ and ‘C’ are and why ? b)    Which of these has maximum number of carbon atoms in the molecule and why ? c)        Write the name and structural formula of the second member of this series.			2017
10.	Give reasons for the following : a)     Unsaturated hydrocarbons show addition reaction but not saturated hydrocarbons b)    Carbon forms only covalent bonds.			2011
11.	The cap of plastic bottle shown in the figure is made up of polypropene and the bottle is made of polyethene. a)     Why are polyethene and polypropene is not ecofriendly with us ? b)    Differentiate between ethane and ethene and write the one important uses of ethane.			2014
12.	a)     Differentiate between alkanes and alkenes. Name and draw the structure of one member of each. b)    Alkanes generally burn with clean flame. Why ?			2013
Rings
01.	Write the structure of benzene.		2023
02.	Write the structural formula of benzene, C6H6.		2019
03.	Write the name and structure of a saturated compound in which the carbon atoms are arranged in a ring. Give the number of single bond present in this Compound.		2018
04.	Draw the structure of the molecule of cyclohexane.		2024& 2020
05.	a)    Write the molecular formula of benzene and draw its structure.		2022

	b)    Write the number of single and double covalent bonds present in a molecule of benzene. c)     Which compound are called alkynes ?
06.	Name a cyclic unsaturated carbon compound.	2020
07.	Write the molecular formula of benzene and draw its structure. List in tabular form the two properties in which covalent compounds differ from ionic compounds.	2017
08.	Compare the structure of benzene and cyclohexane by drawing them.	2017

 

 

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