An important facility for 12th class students preparing for short questions chemistry 12th class chapter 13 of BISE. Get hundreds of questions to prepare and get better marks in 12th chemistry
0
Our database contains a total of 0 questions for chemistry Short Questions. You’ll prepare using this huge databank.
Question: 1
Which ester gives banana and orange smell?
Answer: 1
1-25Amylacetate gives banana while octyl acetate gives orange smell.
Question: 2
What happened when ammonium acetate is heated?
Answer: 2
2-25When ammonium acetate is heated it produce acid amide.
Question: 3
What are Fatty acids?
Answer: 3
3-25The aliphatic monocarboxylic acids are commonly called fatty acids because higher member of this series such as palmitic acid stearic acid etc.obtained by the hydrolysis of fats or oils.
Question: 4
Why Carboxylic acid are soluble in water?
Answer: 4
4-25The carboxylic acids are soluble in water due to hydrogen bonding.
Question: 5
What happens when following are heated?
1.Sodium Format and soda lime
2.Sodium acetate and soda lime
Answer: 5
5-251.When sodium formateis heated with soda lime ,it decomposes to give sodium carbonate and hydrogen.
2.When sodium acetate is heated with soda lime,it decomposes to give sodium carbonate and methane.
Question: 6
Prepare ethane from acetic acid b reduction with HI/O?
Answer: 6
6-25Acetic acid on reduction with HI and red phosphorus give ethane.
Question: 7
Write down formula of palmitic and stearic acid.
Answer: 7
7-25Formula of palmitic is: C15H31COOH
Formula of stearic acid is : C17H35COOH
Question: 8
Manipulate the term 'Esterification ' using alcohol.
Answer: 8
8-25When carboxylic acids are heated in the presence of concentrated sulphuric acid ester are formed this process is called esterification process.
Question: 9
How hydrolysis of ester leads the formation of acetic acids?
Answer: 9
9-25The ester on boiling with concentrated sodium hydroxide yields sodium salt of the acid,This resulting salt when treated with dilute HCI gives the free carboxylic acid.
Question: 10
Give tend of solubility of carboxylic acids in water?
Answer: 10
10-25Among the aliphatic acids,the first four members are very soluble in water due to hydrogen bonding,The solubility in water gradually decrease with the increase in molecular mass.
Question: 11
What are carbocyclic compound
Answer: 11
11-25Organic compound containing (-COOH) as a functional group are called carboxylic compound.
Question: 12
Write down the name of two ester having the following flavours:
1 Pineapple 2.jasmine
Answer: 12
12-251.Pineapple flavour is produced by Ethyl butyrate.
2.Jasmine Flavour is produced by Benzylacetate.
Question: 13
What is meant by Polypeptide and protein?
Answer: 13
13-25The formation of peptide bonds can continue until a molecule containing a several hundred thousand amino acid is formed,Such a molecule is called polyptide or protein.By convention a peptide having molecule is called a polypeptide which peptide having molecular mass more than 10,000 is called protein.
Question: 14
Explain acidic and basic character of amino acid?
Answer: 14
14-25On the basic of dipolar ion structure,the acidic and basic reaction of amino aids may be represented :
1.When an acid is added to an amino acid the carboxylic acid the carboxylate ion accepts the proton,therefore the baci character is due to this group,
2.When an alkali is added to an amino acid,-NH2 group releases the proton and therefore the acidic character is due to the group.
Question: 15
What is Glacial Acetic acid?
Answer: 15
15-25The pure acetic acid freezed to an ice like solid at 17 C,therefore it is called glacial acetic acid,It is miscible with water,alcohol and ether in all proportions,
Question: 16
Define and differentiate between essential and non essential amino acids.
Answer: 16
16-25The ten amino acids which body can be synthesized called non-essential amino acids,The remaining ten amino acids when the body is not able to synthesize are called essential amino acids,The essential amino acids must be supplied to our body through our diet because they are require for proper health and growth,The deficient of essential amino acids may cause disease.
Question: 17
What id Ninhydrin Test?
Answer: 17
17-25Ninhydrin reacts with amino acids to form an intensely coloured bluish violet product,The ninhydrin reaction is also widely used to visualize amino acids separately by paper chromatography.
Question: 18
Give four used of acetic acid?
Answer: 18
18-25Acetic acid is used:
1.as a coagulant for latex in rubber industry.
2.in the manufacturing of plastic rayon and silk.
3.in medicine as a local irritant.
4.in the manufacturing of pickles.
Question: 19
What is difference between peptide and protein?
Answer: 19
19-25Peptides are the compound formed by the condensation of two or more same or different a amino acids,.The condensation occurs between amino acids with the elimination of water.
The formation of peptide bonds can continue until a molecule containing several hundred thousands amino acids is formed,Such a molecule is called polypeptide or protein.
Question: 20
Differentiate between acidic and basic amino acids?
Answer: 20
20-25The amino acids which contain two carboxyl group are called acidic acids,while those containing two amino groups are called acids while lysine is a basic amino acid.
Question: 21
What are amino acids?
Answer: 21
21-25Amino acids are organic compound containing both amino and carboxylic group.
Question: 22
How acetic acid can be converted into ethyl alcohol.
Answer: 22
22-25Carboxylic acid on reaction with lithium aluminium hydride are reduced to alcohol.
Question: 23
What are acidic amino acids?
Answer: 23
23-25The amino acids which contain two carboxyl group are called acidic amino acids.
Question: 24
What is Zwitter ion?
Answer: 24
24-25The amino acid exist as dipolar ion called Zwitter ion,It has positive as well as negative ends within the same molecule.In the formation of Zwitter ion,the proton goes from the carboxylic group to amino group.
Question: 25
What is peptide bond?
Answer: 25
25-25The formation of peptide bonds can continue until a molecule containing several hundred thousand amino acids is formed ,Such a molecule is called polypeptide or protein.
