Carbon and its Compound
One Marks Questions
Answer: 4
Answer: Carboxylic acid
Answer: A series of compounds in which the same functional groupsubstitute for hydrogen in a carbon chain.
Answer: Conc. Sulpuric Acid
Answer: The melting point of pure ethanoic acid is 290K and hence it often freezes during winter in cold climates.
Answer: Alkaline KMnO4 or acidified K2Cr2O7
Answer: Nickel
Answer: 5-8% solution of acetic acid in water is called vinegar.
Answer: Cl/Br
Answer: OH
Answer: (i) Aldehyde group
(ii) Carboxylic acid group
Two Marks Questions
Answer: Compound with identical molecular formula but different structures are called structural isomers.
Eg:
Answer: Carbon,in all its allotropic forms, burns in oxygen to give carbon dioxide along with release of heat and light.
Eg: C+O2 = CO2
Answer:
i) CH3-CH2OH Alkaline KMnO4+Heat CH3COOH
ii)
Answer:
One type of atom or a group of atoms takes the place of another.
CH4+Cl2 = CH3Cl+HCl
Answer:
i) 2Na +2CH3CH2OH=2CH3CH2O-Na++H2
ii)CH3-CH2OH Hot Conc. H2SO4 CH2=CH2+H2O
Answer: 2CH3COOH+Na2CO3 = 2CH3COONa+H2O+CO2 CH3COOH+NaHCO3 = CH3COONa+H2O+CO2
Three and Four Marks Questions
Answer:
i)C3H7OH
ii)C3H6O
iii) C3H6O
iv)C3H6O2
Answer:
i)
ii)
iii)
iv)
i)The ionic end of soap interact with water while the carbon chain interact with oil.The soap molecule thus form structure called micells where one end of the molecules is towards the oil droplets while the ionic end faces outside.This forms dirt in water and we can wash our clothes clean. ii)
| Soap | Detergents |
|---|---|
| The molecule soap sodium or potassium salts of long chain carboxylic acids. | Sodium salt of sulponic acids or ammonium salts with chlorides or bromides ions. |
| Form insoluble precipitates in hard water | Do not form insoluble precipitates in hard water |
