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An elimination reaction is a type of organic reaction in which two substituents are removed from a molecule in either a one or two-step mechanism. The one-step mechanism is known as the E2 reaction, and the two-step mechanism is known as the E1 reaction

Substitution reaction is a chemical reaction during which one functional group in a chemical compound is replaced by another functional group. Substitution reactions are of prime importance in organic chemistry

It helps us to infer the effect of the change of concentration, pressure, or temperature on an equilibrium system.

world trade organization

The full form of WTO is world trade organisation

because of the oxidation of aluminium metal.

Molarity is affected by the temperature . molarity is the ratio between number of moles of solute to the volume of solution in litres and as on increasing temperature the volume increases and hence with the increase in temperature the molarity of solution decreases

98% by weight means 98 gm H2SO4 in 100 gm solution or 98 g H2SO4 in 2 g water.Number of moles of H2SO4 = 98/98 = 1Density = 1.8 g/LVolume of solution = Mass of solution/ Density = 100/1.8 = 55.55 ml = 0.055 L Applying,M1V1 = M2V218.18 x V1 = 0.1 x1V1 = 0.0055 L = 5.5 ml Hence , volume of acid required = 5.5 ml

By adding a very small amount of baking soda to fresh milk, the milkman keeps the milk unspoiled for little more time than usual time.

As the pH value increases the milk turns to slightly alkaline

As baking soda is added, it turned into a base. But curd needs acidic condition to set. Hence this milk takes a long time to set as a curd.

1)combination reaction

2)displacement

3)double displacement

4)decomposition

Displacement1in these reaction ,more reactive metal displace less reactive metal from its compound2 it is a slow reaction3 change of colour take place4 e.g Fe+CuSO4 ---->FeSO4+Cu

double displacement1 there is an exchange of ions between two reactant2 it is a fast reaction3 precipitate are formed4 e.g AgNO33+NaCl-->AgCl+NaNO3

In a displacement reaction, a more reactive element replaces a less reactive element from a compound.

Examples:

2KI + Cl2 → 2KCl + I2 is a displacement reaction.

CuSO4 + Zn → ZnSO4 + Cu is also a displacement reaction.

In a double displacement reaction, two atoms or a group of atoms switch places form new compounds. Examples:

Na2SO4 + BaCl2 → BaSO4 + 2NaCl is a double displacement reaction.

2KBr + BaCl2 → 2KCl + BaBr2 is also a double displacement reaction.

Double displacement reaction 2 compounds react with each other to exchange they are ions to form 2 new compound.

FOR EXAMPLE:---AgNO3+NaCl →. AgCl +NaNo3

1)Answer: When an iron nail dipped in thecopper sulphatesolution than iron displacescopperfrom thecopper sulphatebecause iron is more reactive thancopper. Therefore thecolourof thecopper sulphatesolution changes

2)When lead (II) nitrate is mixed with potassium iodide, potassium nitrate and lead iodide are formed. Here sodium carbonate and calcium chloride exchange ions to form two new compounds.

3)Heating ferrous sulphate in a test tube, following reaction will takes place:

FeSO₄.7H₂O ------>FeSO₄ + 7H₂O

2FeSO₄---->Fe₂O₃ + SO₂ +SO₃

Both SO₂ that is sulfur dioxide and SO₃ that is sulfur trioxide, are gases that are colorless and evolved out.

Only Fe₂O₃, that is ferric oxide which is reddish brown in color remained in the teat tube.

So the answer is Fe₂O₃, that is ferric oxide which is reddish brown in color remain in a test tube after heating ferrous sulfate.

what is your question

option 3 is correct answer

Electrolysis is the process of using electricity to break apart the ions in an ionic substance that is either dissolved in water or molten. Half equations can be used to explain what happens to the ions during electrolysis. Electrolysis is often used to obtain chlorine, hydrogen, sodium hydroxide and to purify sodium and copper metals.

Positively charged ions migrate to the negative electrode (cathode) during electrolysis. They gainelectronsand arereduced.

Negatively charged ions migrate to the positive electrode (anode) during electrolysis. They lose electrons and areoxidised.

The positive charge usually attracts electrons, and the electrode providing electrons is calledcathode, because reduction takes place on it.

I) Copper oxideii)The chemical equation for the reaction is 2Cu + O2-----> 2CuOthe black colour substance is formed by the reaction of copper with oxygen.iii)When copper powder is heated, it combines with oxygen in air to form copper oxide. This copper oxide is black in colour, because of which the surface of copper powder turns black. This reaction is a redox reaction.

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substitution reaction

(i) Yes,tempetaturerises as the beaker gets hot. This is becauselargeamount of heat is released or the reaction is exothermic.

(ii) Combination reaction- Reaction in which a single product is obtained from two or more reactants.

(iii) CaO+H2O→Ca(OH)2+heat

CaO-Quick lime

Ca(OH)2-Slaked lime

Metal compound A is CaCO3

Gas evolved is CO2

Balanced equation:

CaCO3(s) + 2HCl(aq) → CaCl2(aq) + CO2(g) + H2O(l)

HCI gas evolves out .Mgcl2+ H2SO4=》MgSO4 + 2HCI

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If a small piece ofsodiumis dropped into someethanol, itreactssteadily to give off bubbles of hydrogengasand leaves a colourless solution ofsodium ethoxide, CH3CH2ONa.Sodium ethoxide is known as an alkoxide

Hydrogen gas is released.By bringing a burning splinter at the mouth of releasing gas if it extinguishes with a pop sound then it is confirmed as hydrogen gas

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Fermentationis a metabolicprocessthat produces chemical changes in organic substrates through the action of enzymes. The science offermentationis known as zymology. In microorganisms,fermentationis the primary means of producing ATP by the degradation of organic nutrients anaerobically.

Carbon dioxide (CO₂) gas released during fermentation process.

During fermentation process yeast kills itself by converting the sugars (C₁₂H₂₂O₁₁) found in grapes to ethyl alcohol. Alcohol can be separated from this mixture of yeast and other formed products by distillation process.

Products formed during fermentation

C₁₂H₂₂O₁₁ + H₂O + (invertase) → C₆H₁₂O₆ (glucose) + C₆H₁₂O₆ (fructose)C₆H₁₂O₆ (glucose) + Zymase →2 C₂HOH (ethyl alcohol) + 2CO₂

A) h2B) h2

thanx

50g of 40% (w/w) means, if total weight of solution is 50g

then mass of NaoH = 40% of 50 = 20g

and 50ml of 50%(w/v) means in 50 ml of solution , 50% by mass is NaoH

so, mass of 50ml solution is = 50*(d) = 50*1.2 = 60g

then % mass of NaOH = 50% of 60 = 30g

so, 2> 1

option 1

When an iron nail is dipped in a solution of CuSO4, it displaces copper from the Solution, which gets deposited or precipitated as a red or red-brown residue. Also the blue colour of the solution gradually fades. Here, Fe is more reactive than Cu. So Fe displaces Cu to form Iron Sulphate and Copper.

The molecules of air and other fine particles in the atmosphere have smaller size than the wavelength of visible light. These are more effective in scattering light of shorter wavelengths at the blue end than light of longer wavelengths at the red end. The red light has a wavelength about 1.8 times greater than blue light. Thus, when sunlight passes through the atmosphere, the fine particles in air scatter the blue colour (shorter wavelengths) more strongly than red. The scattered blue light enters our eyes.

reddish brown red. fdtwrhixrudysbshww

Pagal ho kya

kaya beujjohuiiiiiijv. gggf

Bhaagh yaha se

When Iron nail (Ferrum) is dipped in Copper sulphate (CuSO4) there takes reaction between them and coppersulphate change its color fromblueto lightgreen. This shows Iron is more reactive than Copper, it can replace Copper from CuSO4.

a) greenb) blue

In a chemical reaction, reactants are consumed while the products are generated. We can understand reactants and products with an example, say photosynthesis. In this reaction the reactants are carbon dioxide, water and sunlight while the products are glucose and oxygen.

double displacement reaction

double displacement reactionbarium sulphite is the PPT obtained

double displacement reaction

it's double displacement reaction. it can be written as BaCl2+CuSO4=BaSO4+CuCl2

1)Friction can be reduced by making the surface smooth by polishing.

2)Friction can be reduced by applying lubricants (like oil or grease) to the rubbing surface.

First method is to lubricate the surface of contact by proper lubricant.

Second is make the surface more smoother.

what is your question

Magnesium hydroxidehas the chemical formulaMg(OH)2and the molecular weight of 58.3197 g/mol. Its CAS number is 1309-42-8 and its density is 2.345 g/cm3. It decomposes when heated to 360 °C and forms theoxide, MgO. It is very slightly soluble in water at 0.00122 g/100 ml and has a solubility product of 5.61 × 10−12.

(Ho) 2 it is a oxide 2w+h20+102+02.w(oh)2+w(03)copper hydroxide

it is in 2 oxide state...

Following activity can be done for this:Take solutions of glucose, alcohol, hydrochloric acid, sulphuric acid, etc.Fix two nails on a cork, and place the cork in a 100 mL beaker.Connect the nails to the two terminals of a 6 volt battery through a bulb and a switch, as shown in figure.Now pour some glucose solution in the beaker and switch on the current.Repeat with alcohol solution and hydrochloric acid.It is observed that bulb does not glow using glucose or alcohol solution. While if a solution of acid is used instead of glucose or alcohol solution, bulb glows.Bulb glows when the solution of hydrochloric acid is used, because it dissociates hydronium ion in aqueous solution. But glucose and alcohol do not dissociate hydronium ion in the water, which is responsible for the conduction of electricity. Hence solution of glucose and alcohol do not conduct electricity.

Distilled water is pure water . Pure water does not have free electrons necessary for conducting electricity . So it does not conduct electricity .

.any water is called universal solvent . It is a very good solvent . .It absorbs any type of impurity readily , in fact looks for it . .So in the formation of rain clouds when water vapor rises from surface water , and when the rain water comes down from the clouds , a lot of contaminants are absorbed in the rain water .

.These contaminants make rain water a good conductor of electricity .