GYANWAY

Chemical reaction  Chemical reaction are the process in which a new substance having a new property are formed .  Unbalanced chemical  equation  In  unbalanced chemical equation ,  number of atom of each type in reactant side (LHS) is not equal to the number of atoms in product (LHS). Balanced chemical equation  in chemical equation in which the number of all the atoms on LHS and RHS is equal is called balanced chemical equation .   Balancing of chemical equation  the process of balancing an unbalanced equation is called balancing of chemical equation. Combination reaction Those chemical reaction in which two or more substance combine to form a single substance are called combination reaction . Example  Mg+O2→2MgO H2(g)+Cl2(g) →2Hcl(g) Decomposition reaction  those reaction in which a single reactant breaks down to give two or more simpler product are called decomposition reaction . CaCO3(s)→CaO(s)+CO2(g) Electrolysis  the pro...

  U nemployment is said to exist when people who are willing to work at the going wages cannot find jobs.  Hence, unemployment has a detrimental impact on the overall growth of an economy . Reason of unemployment  lack of Vocational skill or low educational level of the working population.   labour- intensive sectors suffering from the slowdown in private investment particularly after demonetization  the low productivity in the agriculture sector plus the lack of alternative opportunities for agricultural workers that makes transition among the three sectors difficult . Regressive social norms that deter women from taking /continuing employment.

POPULATION  population typically refers to the number of people in a single area whether it is a city or town ,region, country or the world.  Population is the pivotal element in social studies. It is the point of reference from which all  other elements are observed and from which they derive its significance and meaning. Reason of population growth   Illiteracy = A large population of India is illiterate. illiterate people failed to understand the importance of family planning or the advantages of having a small family . Child marriage = early marriages are common in many parts of India due to which more percentage of girl are married in the age of group of 15-20 years .This result in giving birth to more number of children.   high birth rate and  low death rate = In India after independence there was a high birth rate and high death rate however the death rate has declined now considerably but the birth rate continues to remain high. Lack of female edu...

 , Atoms  the building block of all matter are atoms Atoms are very small they are smaller than anything that we can imagine or compared with Atomic radius is measured in Nanometers Molecules  molecules is in  general a group of two or more atoms that are chemically bonded together, that is, tightly held together by attractive forces Atoms of the same element or of different elements can join together to form molecules  Atomicity The number of atoms constituting a molecule is known as atomicity OR Number of atoms in a molecule Monoatomic = number of atom is one Diatomic state = Number of atomic is two  Triatomic state = Number of atom is three  Isobars = Atoms of different elements with same atomic mass Iso=same             Baros=weight Total nucleon=proton+neutron=atomic Mass Isotope = same number of protons but different number of neutrons Atomic mass = total number of proton and neutron   

  Cell discovered by Robert hooke   Leeuwenhoek   first discovered living cell  Robert Brown discovered nucleus Purkinje = Protoplasm Cell membrane made up of lipids and proteins Microscope discovered by Anton van leeuwenhoek Smallest cell mycoplasma (0.1 Micron ) Largest cell ostrich egg 17 cm diameter  In man   smallest cell = RBC    longest cell = nerve cell 

  1)Third equation of motion? Ans= v 2 - u 2 = 2as 2)Is used to measure the direction and speed of a wave in water.? Ans=SONAR 3)By halving the velocity of a moving body, its momentum becomes? Ans=half 4)The value of g is      Ans= 9.8M/s square 5)f equals       Ans=M*a 6)unit of acceleration     Ans =m/s square 7)Pressure Formula? Ans=p=F/A. 8)The unit of energy is? Ans=joule 10)What is the relation between power and velocity? Ans= p=f* v 11)Second law of motion? Ans= v=u+at 12)First law of motion = Ans=a=1 /2at square 13)What union do sponges belong to? Ans=porifera 14)Name any one animal in which sting cells are found? Ans=hydra 15)Jellyfish belong to which group and where is it found? 16)Jellyfish is a species of coelenterata it is found in the sea. 17)Name any one flying mammal? Ans= Bat 18)Which class of animals are homeothermic animals? Ans=Birds and mammals 19)Name any one sequence which acts as an end parasite in the human gut.? An...

1)  Which metal  fold used by Rutherford Ans =Gold foil 2) According to which scientist atom is indivisible Ans= Delton 3) Wright symbol of iron Ans=Fe 4) Air is Ans= Mixture  5)What is the the boiling point of water Ans= 100 degree Celsius 6) What is the percentage of of carbon dioxide Ans=0.03%  7)What is the reason of decay of of ozone layer Ans=Chlorofluorocarbon 8)How much area surrounded by water  Ans=75% 9)Which of the following responsible for  infected disease   a) Air             b)microbes                                c) all of these  Ans  = all of these 10)Out of these which disease caused by virus a) Cholera              b)malaria                              c)dengue Ans=...