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Oxidation REACTION MEANS addition of oxygen and REMOVAL of HYDROGEN
reduction reaction means addition of hydrogen and removal of oxygen

According  to  Rutherford  electrons  revolve  around  the  nucleus.When  a  particle  is  in  circular  motion  it  will  have  acceleration  and  radiate  energy.The  revolving  ELECTRON  would  lose  energy  and  FINALLY  fall  into  the  nucleus.So  the  atom  should  be  unstable  which  is  not  so.This  is  the  drawback  of  Rutherford's  MODEL  of  atom.

Rutherford's  observations  after  gold  foil  experiment  were:
* Most  of  the  space  inside  the  atom  because  most  of  the  particles  PASSED  straight  through  the  gold  foil.
* There  is  a  positive  charge  for  the  atom  occupying  very  little  space because  some  of  the  alpha  particles  were  deflected  by  small  angles.
* All  the  positive  charge  and  mass  of  the  atom  are  concentrated  in  a  very  small  volume  because  one  out  of  every  12000  particles  rebounded.

The  features  of  Rutherford's  model  of atom:
*  There  is  a  positively  charged  centre  in  an  atom  CALLED  the  nulceus.Nearly  all  the  mass  resides  in  the  nucleus.
*  Electrons   are  revolving  around  the  nucleus  in  well  defined  orbits.
* Size  of  the  nulcleus is  very  small  compared  to  the  size  of  the  atom.
 
                                                                                                                                                                                                                                                                                        

The reaction in which a large amount of heat is evolved is called combustion reaction.

If very limited air is supplied, then Methane gives CARBON BLACK.

The reaction is as follows:-

       CH4    +        O2     =    C    +     2H2O

       where,

                   O2 is limited air and C is carbon black

Thermodynamically more STABLE means  the substance is THERMALLY HEATED or is used as METAL substance or it is a substance

Mole of SUCROSE = 3.42/342 = 0.01
number of atom of sucrose = 6.02×10∧23*0.01 = 6.02×10∧21
one sucrose atom CONTAIN 12 CARBON atom
so number of carbon atom in 3.42g of sucrose = 12×6.02×10∧21
                                                                   = 72.24×10∧21

So 23 g Na has 6.023 x 10 ²³ ATOMS

⇒  g Na has 6.023 x 10 ²² atoms

so 6.023 x 10 ²² atoms ANSWER

First calculate ther NUMBER of moles of O2 USING: moles = mass / RELATIVE molecular mass = 8 / 32 = 0.25. 
For each molecule of O2, there are 2 OXYGEN atoms. Therefore moles of oxygen atoms = 2 x 0.25 = 0.5 

1 mole of anything is 6.022 x 10^23 atoms (Avogadro constant) 
So number of atoms = 0.5 x 6.022 x 10^23 = 3.011 x 10^23 

Only a DOUBLE or triple bond CONTAINING COMPOUND decolourise the ALK. KMnO4 so  it means ethene can decolourise the KMnO4.

Fatty FOOD is FOUND in lays and fast FOODS from that MANY disees are caused

Electrons and PROTONS are there to CREATE a atom and by this only we get the positive CHARGE and NEGATIVE charge

1.according to DOBEREINER's law of traid's PROPERTIES of each traid were similar nd atomic mass of the middle element was ROUGHLY the average of the atomic masses of the other two ELEMENTS.2.according to newland's octaves the properties of every EIGHT element was similar to that of the first element.3. The properties of the elements are a periodic function of their atomic masses.4. The properties of elements are the periodic function of their atomic number.

(A) is RIGHT..
since one molecule each of H and O are combining, there will be 2 MOLECULES on product SIDE as WELL

(D) is the RIGHT ANSWER

If you see carbon ATOMS with symbol(C)then u can FIND BONDS

In fac ISOMER, there are two faces formed by the AAA and BBB and in mer isomer, the two AA ENTITY form a meridian and two BB entity form another meridian.

RATIO = 1:8
Hydrogen = 4 G ( 1 X 4 )

OXYGEN = 8 x 4 = 32 g

The above process is known as Safonification .

USUALLY, a process by which triglycerides are reacted with sodium or potassium HYDROXIDE to PRODUCE glycerol and a fatty acid salt, called 'SOAP'.

so the compound added is NaOH with the complex esters to form soap

When energy is provided to electron, the electron is excited to high energy level. But it is WRONG to say that atom will be UNSTABLE. It will OBVIOUSLY be less STABLE than when the electron was at the ground state.
The most stable state is when the electron is at the ground level and hence it has LEAST energy. The stability decreases when energy is provided and electron is excited to higher energy orbital.

O2 under elcetric DISCHARGE will combine with other OXYGEN MOLECULES to FORM ozone

WATER is a polar covalent compound and has a high dielectric CONSTANT which SHOWS CHARGE separation

therefore  the H+ IONS attract the non metallic ion and the OH- ions attract the metallic ion therefore the ionic compound seperates

The RELATIVE ATOMIC masses of elements in NAOH are Na=23 H=1 O=16
so the relative MASS of NaOH IS 23+16+1=40.

A. calcium can be EASILY broken so such a delicate thing cannot be used.
b.Lead is water soluble so it can be easily dissolve in water and leakage OCCUR . While copper does not react with water.
c. Magnesium burn to produce blazzing white light . So it is used in FIREWORK and it also burn easily.
d. Gold is highly mealiable . so it can be used to FILL cavity

This Hybridization(combining) of orbitals occurs when 3 p - orbitals hybridize with 1 s orbital in exited state .This this used to EXPLAIN MANY type of ORGANIC compounds

In the SIMPLE CH₄ sp³ hybridization occurs where the s orbital of hydrogen overlaps the sp³ orbitals of carbon

Molar mass of CO₂ = 12+ 2×16 = 44g
44g of CO₂ CONTAINS 1 MOLE of CO₂.
22g of CO₂ will contain = 22/44 = 0.5 mole

molar mass of METHANE, CH₄ = 12+ 4×1 = 16g
16g of CH₄ contains 1 mole of CH₄.
8g of CH₄ will contain = 8/16 = 0.5 mole

so both contain 0.5 mole of each substances
1 mole = 6×10²³ atoms
0.5 mole = 0.5×6×10²³ = 3×10²³ atoms

So answer is A.

A solid electric conductor through which electricity enters or LEAVES an electrolytic cell or any other medium.
ELECTRODES are USED in arc welding.
electrodes are used for fused cells.
electrolysis electrodes are MADE of platinum.

The SOAP MOLECULES,thus FORM structures called micelless

He ARRANGED 63 ELEMENTS that are KNOWN at that TIME on a table.

Aim:to prove law of conservation of mass
material REQUIRED:water,test tube,BEAKER,weigher
procedure:take some water in a beaker and some in test tube and put the test tube in the beaker but don,t allow the water in the beaker and the water in the test tube to MIX.now weigh it.note down the readings.now totally mix it.again weigh it.we observe that WEIGHT does not change

Molecular FORMULA of SUCROSE is C₁₂H₂₂O₁₁.
Molecular mass = 12×12 + 1×22 + 16×11 = 144  + 22 + 176 = 342 amu 

The law of CONSERVATION of MASS states that matter is neither created nor destroyed. The mass of the reactants is therefore equal to the mass of the PRODUCTS. Solving PROBLEMS INVOLVING the law of conservation of mass is a main concept used for comprehending chemical equations. Predictions about the mass of a reactant or a product can be determined by knowing the masses of the other reactants and products.