An important facility for 10th class students preparing for short questions chemistry 10th class chapter 3 of BISE. Get hundreds of questions to prepare and get better marks in 10th chemistry
0
Our database contains a total of 0 questions for chemistry Short Questions. You’ll prepare using this huge databank.
Question: 1
Differentiate open chain & closed chain compounds.
Answer: 1
1-55Open Chain compounds: Open chain compounds are those in which the end carbon are not joined with each other in this way they form a long chain of carbon atom.
H3C -CH2-CH2-CH3
Question: 2
What are organic compounds?
Answer: 2
2-55Organic chemistry are hydrocarbon and their derivatives in which covalently bonded carbon is an essential constituent.
Question: 3
Give the general formula of Alkane.
Answer: 3
3-55The general formula of Alkane is Cn H2n+2
Question: 4
CNG stand for what?
Answer: 4
4-55CNG stand for compressed natrual gas.
Question: 5
What is petroleum?
Answer: 5
5-55"Petroleum is a dark brownish or greenish black color viscous liquid.
Question: 6
Define organic chemistry?
Answer: 6
6-55Organic chemistry is the branch of chemistry in which we study about macromolecules in living organisms lime carbohydrates, proteins, lipids etc.
Question: 7
Define structural formula.
Answer: 7
7-55Structural formula of a compound represents the exact arrangement of the different atoms of various elements present in a molecule of a substances.
Example: Iso butane
Question: 8
What is molecular formula? Also give an example
Answer: 8
8-55The formula which represent s the actual number of atoms in one molecule of organic compound is called molecular formula.
Example: Butane.
Question: 9
Define functional group.
Answer: 9
9-55An atom or group of atoms or presence of double or triple bond which determines the characteristic properties of an organic compound known as functional group
Question: 10
What is coal gas?
Answer: 10
10-55It is a mixture of hydrogen, methane and carbon monoxide.
Question: 11
How many types of chemical formula of organic compounds?
Answer: 11
11-55there are four types of chemical formulas of organic compounds.
Molecular formula
Condensed formula
Dot-cross formula
Structural formula
Question: 12
Define Isomerism?
Answer: 12
12-55The compounds are said to be isomers if they have the same molecular formula but different arrangement of atoms in their molecules or different structural formula and phenomenon is called isomerism
Question: 13
How a ketonic group is tested?
Answer: 13
13-55Shake a pinch of the given organic compound with about 2 cm3 of Phenyl hydrazine solution .
Question: 14
Give use of organic compounds in medicines?
Answer: 14
14-55A large number of organic compounds are used as medicines by us Most life saving medicines are synthesized in laboratories.
Question: 15
Define functional group with an example:
Answer: 15
15-55An atom or group of atoms or presence of double or triple bond which determines the characteristic properties of an organic compound is known as the functional group.
Example-OH group is the functional group of alcohols, which fives charactristics properties of alcohols.
Question: 16
What is the importance of natural gas.
Answer: 16
16-55Natural gas is used as fuel in homes as well as in industries. It is used as fuel in automobiles as compressed natural gas natural gas is also used to make carbon black and fertilizer.
Question: 17
Why and how carbon completes its octet.
Answer: 17
17-55Carbon gets minimum energy and maximum stability by sharing its four valence electrons with other atoms, In this way it completes its octet.
Question: 18
What is Ammoniacal liquor?
Answer: 18
18-55It is a solution of ammonia gas in water. It is used to prepare nitrogenous fertilizer.
Question: 19
How an alcohol is tested?
Answer: 19
19-55Sodium metals test is used for alcohol
Question: 20
What is molecular formula ? Also give an example
Answer: 20
20-55The formula which represents the actual number of atoms in one molecule of organic compound is called molecular formula
Question: 21
What is COKE? For what purpose used?
Answer: 21
21-55Coke is 98% carbon. It is left behind as residue of coal.It is mainly used as a reducing agent in the extraction of metals especially iron. It is also used as fuel.
Question: 22
What is ester group? Write formula of ethyl acetate.
Answer: 22
22-55Organic compounds consisting of RCOOR functional group are called esters.
The general formula of ether is R-C-OR R and R are alkyl grops. They may be same or different such as.
Question: 23
Justify that organic compound are used as food.
Answer: 23
23-55the food we eat easily such as milk, eggs, meat, vegetables, ect, contain carbohydrates, proteins, fats, vitamins, etc, are all organic stuff.
Question: 24
Why the melting and boiling pints of organic compounds are low?
Answer: 24
24-55Organic compounds have low melting or boiling points due to presences of covalent bond which is weaker than ionic bond.
Question: 25
What are organic compound ?
Answer: 25
25-55Organic chemistry are hydrocarbon and their derivatives in which covalently bonded carbon is an essential constituent
Question: 26
Name the gases which are found in coal gas.
Answer: 26
26-55the gases which are found in coal gas are hydrogen, methane, carbon monoxide.
Question: 27
What type of compounds are synthesized by plants?
Answer: 27
27-55Living plants synthesize macromolecules e.g. Carbohydrates, proteins oils ans vitamins.
Question: 28
Define organic chemistry .
Answer: 28
28-55Organic chemistry is the branch of chemistry which we study about macromolecules in living organisms like carbohydrates , proteins , lipids etc
Question: 29
Why benzene and other homologous compound of benzene are called aromatic compound.
Answer: 29
29-55These organic compounds contain at least one benzene ring in their molecule. A benzene ring is made up of six carbon atoms with three alternating double bonds. They are called aromatic because of aroma or smell they have.
Question: 30
What is coke ? Foe what purpose used ?
Answer: 30
30-55Coke is 98% carbon . It is left behind as residue of coal . It is mainly used as a reducing agent in the extraction of metals especially iron . It is also used as fuel
Question: 31
Differentiate open chain and closed chain compounds .
Answer: 31
31-55Open chain compound : Open chain compounds are those in which the end carbon are not joined with each other in this way they form a long chain of carbon atomH3C -CH2 -CH2 -CH3
Question: 32
What are heterocyclic compound.
Answer: 32
32-55Heterocyclic compounds that contain one or more atoms other than that of carbon atoms in their rings are called heterocyclic compounds.
Question: 33
How many types of chemical formula of organic compound ?
Answer: 33
33-55There are four typeschemical formula of organic compound
1: Molecular formula
2: Condensed formula
3: Dot-cross formula
4: Structural formula
Question: 34
Give use of organic compounds in medicine
Answer: 34
34-55A large number of organic compounds are used as medicines by us . Most life saving medicines are synthesized in laboratories
Question: 35
Define vital force theory?
Answer: 35
35-55According to this theory organic compounds could not be prepared in laboratories because they were supposed to be synthesized under the influence of a mysterious force called vital force.
Question: 36
Name the gas which are found in coal gas.
Answer: 36
36-55Coal gas is mixture of hydrogen , methane and carbon monoxide
Question: 37
Give the functional groups of alkenes and alkynes?
Answer: 37
37-55Alkenes: Hydrocarbon compounds consisting of double bonds between two carbon atoms in their molecules are called as alkenes.
Question: 38
What is ammonical liquor ?
Answer: 38
38-55It is a solution of ammonia gas in water . It is used to prepare nitrogenous fertilizer
Question: 39
Why the melting and boiling points of organic compounds are low ?
Answer: 39
39-55Organic compounds have low melting or boiling points due to presence of covalent bond which is weaker than ionic bond
Question: 40
What is the basic unit of carbohydrates and how it is synthesized.
Answer: 40
40-55The basic unit of all types of carbohydrates in glucose which is synthesized by plants through photosynthesis.
Question: 41
Give the general formula of Alkane
Answer: 41
41-55The general formula of Alkane is CnH2n+2
Question: 42
Our existence owe to organic compounds , comment
Answer: 42
42-55Our existence owe to organic compounds because these compounds are part of everything from food we eat to the various items we use in daily life to fulfill our needs
Question: 43
Define isomerism
Answer: 43
43-55The compounds are said to be isomers if they have the same molecular formula bu different arrangement of atoms in their molecules or different structural formula and phenomenon is called isomerism
Question: 44
Which ability of carbon is responsible for diversity and magnitude of organic compounds ?
Answer: 44
44-55There are four mains reasons of existence of large number
1: Catenation
2: Isomerism
3: Strength of covalent bond
4: Multiple bonding
Question: 45
What is coal gas ?
Answer: 45
45-55It is a mixture of hydrogen , methane and carbon monoxide
Question: 46
CNG stands for what ?
Answer: 46
46-55CNG stands for compressed natural gas
Question: 47
What is petroleum ?
Answer: 47
47-55Petroleum is a dark brownish or greenish black coloured viscous liquid
Question: 48
What is the importance of natural gas ?
Answer: 48
48-55This is because intermolecular forces between the molecules are weak
Natural gas is used as fuel in homes as well as fuel in homes as well as in industries . It is used as fuel in automobiles as compressed natural gas (CNG) . Natural gas is also used to make carbon black and fertilizer
Question: 49
What are pharmaceutical chemists work towards the partial and total synthesis of effective drugs ?
Answer: 49
49-55Synthesize of effective drugs to control the epidemics and fatal diseases are the need of the society . The responsibility to synthesize effective drugs is of pharmaceutical chemists , They can evaluate the efficiency and safety of these drugs . They make the drugs more and more effective by reducing their side effects and enhancing potency
Question: 50
How alkyl radical formed ? Explain with example
Answer: 50
50-55Alkyl radicals are derivatives of alkanes . They are formed by the removal of one of the hydrogen atom of an alkane and are represented by a letter 'R' . Their names is written by replacing 'ane' of alkane with 'yl'
Question: 51
Name the gases which are found in coal gas ?
Answer: 51
51-55The gases which are found in coal gas are hydrogen , methane , carbon monoxide
Question: 52
How an alcohol is tested ?
Answer: 52
52-55Sodium metal test is used for alcohol
Question: 53
Define functional group .
Answer: 53
53-55An atom or group of atoms or presence of double or triple bond which determines the the characteristic properties of an organic compound known as functional group
Question: 54
Why and how carbon complete its octet ?
Answer: 54
54-55Carbon gets minimum energy and maximum stability by sharing its four valence electrons with other atoms . In this way it completes its octet
Question: 55
Define functional group with an example ,
Answer: 55
55-55An atom or group of atoms or presence of double or triple bond which determines the characteristics properties of an organic compound is known as functional group
