SureDen
Introduction
Everything in this universe
Ionisation Energy / Ionisation Enthalpy (I.E.)
It is amount of energy required to remove most loosely bound electron from gaseous atom to form gase
Thermodynamics : It is a branch of science which deals with exchange of heat energy between bodies and conversion of the heat energy into mechanical energy an
Enthalpy change or Heat change of Reaction
The heat of reaction is defined as heat evolved or absorbed when a certain number of moles of the reacta
Ionic or Electrovalent Bond:-
Formation of sodium chloride
Crystalline Solids:
Amorphous solids are very useful but most of the solids are crystalline in nature due to thermodynamically favorable conditions
There are 3 states of matter:-
(i) Solid → It’s melting point is above room temperature under atmospheric pressure.
Electron Gain Enthalpy (EGE):-It is the amount of energy released a (absorbed in some few cases) when an extra electron is added to isolated gaseous neu
Fuel cells:- Cells which can convert energy produced during the confusion of fuels directly into electrical energy. Fuel can be hydrogen, methane, methanol et
Leaves :
A leaf is a dissimilar, green, flat, expended lateral outgrowth of stem or its branches on a node.
Each leaf consists
Sample Paper
Class – XI
Subject - Chemistry
Time : 1:30 hr
Origin of coal and petroleum
Coal and petroleum have organic origin, being decomposed plant and animal matter buried deep inside the earth. Coal is
Some basic concepts in chemistry:-
MatteràIts anything that occupies space, possesses mass and can be fel
(6) Oxides:- The elements of group 15 combine directly or indirectly to form a large number of oxides. All the oxides of nitrogen (except NO and N2
Frog
Phylum : Chordata
Sub phylum : Vertebrata
Section : Gnathostomata
Class : Amphibian
Sub cl
Preparation of haloalkanes Part 1
Preparation of haloalkanes:
Haloalkanes can be produced from virtually all organic precursors. From the perspective of industry, the most important ones are alkanes and alkenes.
From A
Preparation of haloalkanes Part 2
From Alcohol:
Alcohol undergoes nucleophilic substitution reaction by halogen acid to give Haloalkanes.Tertiary alkanol reacts with hydrochloric acid directly to produce tertiary chloroalkane, but if prim
Anatomy of Flowering Plants
Secondary Growth:
Secondary growth is absent in monocotyledons, but present in dico
Nomenclature, preparation and properties of i. Acid halides ii. Acid amides iii. Acid anhydrides and iv. Esters
Introduction of carboxylic
Nitrogen cycle :
Nitrogen is limiting nutrient for both natural and agricultural eco-systems as plants compete with microbes for limited nitrogen that is
1)Law of conservation of mass :- in all physical and chemical charges, the total mass of products in same as that of react reactants.
Dalton’s atomic theory:- In 1808 Dalton published a new system of chemical philosophy in which t
Primary function of leaf
Primary function of leaves:
Photosynthesis: The principal functi
Law of Chemical equilibrium or equilibrium constant:-
Let us consider the reaction
Factors affecting Equilibrium:-
Le Chatelier’s principle:- It states that if a system in equilibrium
Ideal gas Equation:-
Any Gas which follows all the gas laws is known as Ideal Gas.
PV = nRT
Ideal gas
# Scattering:
“It is the phenomena in which light is emitted by the particles of the medium in all directions after absorption.”
Physical properties of aromatic amines
Hydrogen bonding significantly influences the properties of primary and secondary amines. Thus the boiling p
Transpiration:- The loss of water through stomata in the leaves is called transpiration.
- It is evaporative loss of water through
Test Details
Calculate the relative rates of diffusion of 235UF6 and 238UF6 in the gaseous state (At. Mass of F = 19) under the same condition of temperature and pressure?
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