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Physical Quantity.
A quantity which can be measured and by which various physical phenomenon can be explained and expressed in form of laws of physics is called a physical quantity. For example length, mass, time, force etc.
Application of Dimensional Analysis.
(1) To find the unit of a physical quantity in a given system of units : In a dimensional formula, replacing M, L and T by the fundamental units of the required system we can get the un
Errors of Measurement
This difference in the true value and measured value of a quantity is called error of measurement.
(1) Abs
Dimensions of a Physical Quantity.
The powers to which fundamental quantities must be raised in order to express the given physical quantity are called its dimensions.
To make it more clear, consider the physical quantity force
Structure of functional group in carboxylic acid derivatives
The structure of the functional groups in acyl halide, acid anhydride, ester and amide
VECTOR
A physical quantity having magnitude and direction and also obeying the law of vector addition is a vector quantity. A vector quantity is re
Physical properties of aliphatic aldehydes and ketones
Aldehydes and ketones are simple compounds which contain acarbonyl group - a carbon-oxygen d
Physical properties of aromatic amines
Hydrogen bonding significantly influences the properties of primary and secondary amines. Thus the boiling p
Physical properties of aliphatic amines
i) Physical state and smell
Lower members of aliphatic amines are gases while h
Limitations of Dimensional Analysis.
(1) Dimensions are not unique. Two Physical Quantities can have same dimensions. For example torque and
System of units : A complete set of units, both fundamental and derived for all kinds of physical quantities is called system of units. The common systems are given below
(1) CGS system : The system is also called Gaussian system of units. In
Adsorption:- The phenomenon of attracting and retaining the molecules of a substance on the surface of a material (solid or liquid), resulting into a higher c
Physical properties of haloarenes or aryl halides .
For the same halogen atom, the melting and boiling points increase as the size of the aryl grou
Physical properties of monocarboxylic acids
1. Physical state
The first three aliphatic acids are colorless liquids wit
CHEMICAL REACTIONS AND EQUATIONS
Writing a Chemical Reaction
Types of Chemical Reaction
Oxidation &
Classification of solids – Solids can be classified into two types on the basis of the arrangements of their constituent particles (atoms, molecules or ions). These
Physical properties monohydric alcohols
Alcohols consist of two parts, an alkyl/aryl group and a hydroxyl group. The properties of alcohols and phe
Physical properties of nitro compounds
The structure of a nitro group can be represented as a resonance hybrid of two equivalent zwitter ionic pola
(1) Time period : It is the least interval of time after which the periodic motion of a body repeats itself.
S.I. units of time period is second.
Some basic concepts in chemistry:-
MatteràIts anything that occupies space, possesses mass and can be fel
System of units : A complete set of units, both fundamental and derived for all kinds of physical quantities is called system of units. The common systems are given below
(1) CGS system : The system is also called Gaussian system of units. In it length, mass
Characteristics of physical equilibrium:-
The system must be a closed one.
The equilibrium should be dynamic in nature.
Crystalline Solids:
Amorphous solids are very useful but most of the solids are crystalline in nature due to thermodynamically favorable conditions
GENERAL CHARACTERSTICS OF ETHERS :
PHYSICAL PROPERTIES :
Physical properties of ether
Physical properties of benzene
Benzene is a colorless liquid (melting point 5.5°C, boiling point 80.4°C) with a chara
Equilibrium is that state in which the rate of forward reaction equal to rate of backward reaction.
The rate of changes of concentration of the reactant become equa
The process involving physical equilibrium are:
Solid
Competent Host (For Transformation with Recombinant DNA)
DNA being a hydrophilic molecule, cannot pass through cell membranes.
Test Details
The dimensions of physical quantity X in the equation Force =XDensity is given by
Test Details
A physical quantity is measured and its value is found to be nu where n= numerical value and u= unit.
Then which of the following relations is true
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