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In modern periodic table isotopes is placed in the SLOT of METALS like chlorine has a ISOTOPE it placed with its METAL

ANSWER: 1.34 X 10^-4

Explanation:

ANSWER---

◆ Most dirt is oily in nature and the hydrophobic END attached itself with dirt, while the ionic end is surrounded with molecules of water. This formation of a radical structure CALLED micelles.

◆ An EMULSION is THUS formed by soap molecules. The clothes NEED to be mechanically agitated to remove the dirt particles from the clothes.

◆ Scum - The Magnesium and Calcium salts present in hard water reacts with soap molecule to form insoluble product is called scum, thus obstructing the cleaning action. Use of detergents overcome this problem as the detergent molecule prevent the formation of insoluble product and thus clothes get cleaned.

ACIDS- HCL (dil.) Is used for cleaning TOILETS,sinkwares.

Sulfuric acid is used in soda-acid fire extinguisher.

Base- sodium hydroxide is used in manufacturing soap.

Salts- for common uses of day to day salts, MAGNESIUM hydroxide is used to PREPARE antacids.

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The carbon atom has a partially positive charge and the OXYGEN atom have a partially negative charge Aldehyde usually more reactive towards nucleophilic substitution than KETONES because of both Steric and ELECTRONIC EFFECTS .

Fibres

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Forest fire is an EXAMPLE of spontaneous combustion. The forest fire is caused naturally, the forest bursts into flames WITHOUT any application of aparent cause,SOMETIMES when the leaves are completely dry, the ignition temperature needed for dry leaves is very low and thus how the forest fire occurs.

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Kohlrausch LAW of independent migration of IONS: The law states that limiting molar conductivity of an electrolyte can be REPRESENTED as the sum of the individual CONTRIBUTIONS of the anion and cation of the electrolyte

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The most common fire extinguisher is fire bit in CASE of ELECTRICAL equipments, water may conduct electricity and THUS carbon dioxide is used in case of electrical equipment and SHORT CIRCUIT.

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➡ REFER to ATTACHMENT
option B ) 823 nm is correct.....

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During respiration glucose MOLECULES converted into other molecules in a series of STEPS . They finally END up as carbon dioxide and water. The reaction is exothermic because it RELEASES some HEAT energy.

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Reddish BROWN fumes of NO2 is formed on heating lead nitrate.



the balanced equation is

2Pb(NO3)2 -------> 2PbO + 4NO2 + O2




It is a THERMAL decomposition reaction.




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The FORMULAE of Magnesium HYDROXIDE is Mg(OH)2.

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Its IUPAC NAME is METHANOL

Na2So4+Bacl2- Baso4+2Nacl
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Compounds are CH3COOH & CH3CH2COOH.

Ehanoic acid on REACTING with sodium HYDROXIDE give sodium SALT and water.

CH3COOH + NaOH---->CH3COONa+ H2O

The NH2 group contains lone pair so NH2 donate it to benzene ring ......
ND atom which donate electrons known as activating groups ...
activating groups SHOW electron density at ortho - PARA so that they called ortho - para directing groups


the NO2 is electron withdrawing group as it no contains lone pair
electron withdrawing group is known as.
deactivating group
they show e- density at meta position ...
so that ...NO2 known as meta directing

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This reaction of ETHANOL with sulphuric acid shows that it is a STRONG DEHYDRATING AGENT which remove water molecule from ethanol.

X-ethanol
Y-ethanoic acid
Z-ester

Base CHANGES COLOURLESS phenolphthalein into pink COLOUR while acid gives no change.

Acid turns orange colour of METHYL orange red while base gives no change.

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Its not a dehydrating agent.
some EXAMPLES of dehydrating AGENTS are aluminium OXIDE, sulphuric acid.

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It REPRESENTS TWO compounds
1 ) is... 1,1 dichloro ETHANE
2)is ...1,2 dichloro Ethane

Producer gas

Producer gas is fuel gas that is manufactured from material such as coal, as opposed tonatural gas. It can be produced from various FUELS by partial combustion with air, usually modified by simultaneous injection of water or steam to maintain a constant temperature and obtain a higher heat content gas by enrichment of air gas with hydrogen. In this respect it is similar to other types of "manufactured" gas, such as coal gas, coke oven gas, water gas and carburetted water gas. Producer gas was used primarily as an industrial fuel for iron and steel MANUFACTURING, such as firing coke ovens and blast furnaces, cement and CERAMIC kilns, or for mechanical power through gas engines. It was characteristically low in heating value but cheap to make, so that large amounts could be made and burnt.

In the USA, producer gas may be wood gasproduced in a gasifier and used to fire kilns and has been used to power CARS and boats[1],town gas, originally produced from coal, for sale to consumers, and syngas, used as a fuel source or as an intermediate for the production of other chemicals.

In the UK, producer gas, also known assuction gas, means a fuel gas made fromcoke, or other carbonaceous material[2] such as anthracite. Air is passed over the red-hot carbonaceous fuel and CARBON monoxide is produced. The reaction is exothermic and proceeds as follows:

Formation of producer gas from air and carbon:

C + O2 → CO2, +97,600 caloriesCO2 + C → 2CO, -38,800 calories2C + O2 → 2CO, +58,800 calories

Reactions between steam and carbon:

H20+C → H2+CO, -28,800 calories2H20+C → 2H2+CO2, -18,800 "

Reaction between steam and carbon monoxide:

H2O + CO → CO2 + H2, + 10,000 caloriesCO2 + H2 → CO +H2O, -10,000 calories

The average composition of ordinary producer gas according to Latta was: CO2: 5.8%; O2: 1.3%; CO: 19.8%; H2: 15.1%; CH4: 1.3%; N2: 56.7%; B.T.U. gross per cu.ft 136 The concentration of carbon monoxide in the "ideal" producer gas was considered to be 34.7% carbon monoxide (carbonic oxide) and 65.3% nitrogen.After "scrubbing", to removetar, the gas may be used to power gas turbines (which are well-suited to fuels of low calorific value), spark ignited engines (where 100% petrol fuel replacement is possible) or diesel internal combustion engines (where 15% to 40% of the original diesel fuel requirement is still used to ignite the gas ). During World War II in Britain, plants were built in the form of trailers for towing behind commercial vehicles, especially buses, to supply gas as a replacement for petrol (gasoline) fuel.A range of about 80 miles for every charge of anthracite was achieved

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Chemical NAME:SODIUM ethoxide;Sodium ethylate; SODIUM ETHANOLATE; Sodiumethoxide; Ethoxysodium   


MOLECULAR Formula:C2H5ONa or C2H5NaO

Molecular Weight:68.051 g/mol

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It is a DOUBLE displacement reaction.
when a solution of SODIUM sulphate ( Na2So4 ) is added to a solution of ( BACL2 ) then double displacement reaction takes PLACE and the ions get exchanged to form sodium chloride( NaCl ) and barium sulphate ( BaSo4 ).

Na2So4 + BaCl2 ➡ 2Nacl + BaSo4

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It is DEPEND UPON NUMBER of BOND.

Nacl
NaOH
Nh4OH
There are some COMPOUND of SODIUM

In chemistry, a radical is an atom, MOLECULE, or ION that has an unpaired valence electron. With some EXCEPTIONS, these unpaired electrons MAKE radicals highly chemically reactive. MANY radicals spontaneously dimerize. Most organic radicals have short lifetimes.

To break up 1 mole of GASEOUS hydrogen chloride MOLECULES into SEPARATE gaseous hydrogen and chlorine atoms takes 432 kJ. The bond DISSOCIATION enthalpy for the H-Clbond is +432 kJ mol-1.

Valency is the combining capacity of the atom of an element. It is equal to the number of electrons an atom can donate or accept or share.

Copper and iron shows more than one valency which is also known as VARIABLE valency.

Therefore, copper shows valencies 1 and 2 :

CU+, cuprous.. And Cu2+,cupric

Iron also shows two valencies:

FE2+,FERROUS.. And Fe3+ ferric

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The GAS is NITROGEN

They have ASKED us to WRITE the formula with NITRATE chlorine which are anions

So x is a cation

X is a metal as it LOST electrons to form positive charge