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3)Puretungstenhas some amazing properties including the highest melting point (3695 K), lowest vapor pressure, and greatest tensile strength out of all the metals.Because of these properties it is the most commonlyusedmaterial for lightbulb filaments.

1)Copperis a very good electrical conductor. This means that the resistance of a length ofcopper cableis relatively low. Analuminium cablewould have nearly twice the resistance of acopper cablewith the same dimensions. Therefore the energy losses in thealuminium cablewill be higher than in thecopper cable.

2)Fuse wires are made of Tin-lead alloy instead of copper due to various reasons.This wire is consist of low melting point as well as the have the high resistance.The alloy result in good functioning of the fuse. As the tin cause the good conductivity property . Also the low melting point occur due to the lead.Other wise the fuse can cause problem due to the surface corrosion.Hope this helps.

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Thanks mt bola

The IUPAC name is

Diammine dichlorido platinum(II)

diammine dichloride platinum

diammine dichlorido platinum (two)

Molarity = No. of Moles of Solute / Vol. of solution in litres

let us assume 1lt of this solution,and let number of moles be x.

0.5=x/1,

x=0.5

Therefore no. of moles are 0.5.

now Normality for acids = No. moles of acid / (Vol. of sol in lts * Basicity)

as H2SO4 has 2 replacable hydrogen ions therefore basicity is 2.

Normality= 0.5/(1*2)

Normality= 0.25

Oleum is made by adding hydrochloric achid to SO3

Formic acid is HCOOH is methanoic acid.

option C is the answer.. X-O-X is 3 in both

(i) The mixture of water, groundnut oil and common salt will be put in separating funnel and allowed to stand for sometime.

(ii) The mixture separates into two layers according to the densities of water and groundnut oil.

(iii) Water is heavier than groundnut oil .

(iv) So, water forms lower layer while groundnut oil forms upper layer.

(v) On opening the stop clock of separating funnel, the lower layer of water comes out first and collected in beaker leaving behind groundnut oil

vi) Now, solution of water and common salt will be heated.

(vii) Water will be evaporated leaving behind solid common salt.

Mercury

option to A

Anerobic bacteria which are gram negative. For example : Cholera, E coli.

thanks

Separating funnel is usedto separate the mixtureof two immiscible liquids.

Kerosene oilandwaterdo notmixwith each other and form twoseparatelayers.

Themixture separates into two layers according to their densities.

1000 ml water = 1000 gm water

So 18 ml water = 18 gm water

Mole = 18/18 =1 mol

( molecular weight of water =18)

In 1 atom of water total electrons are 10

So in 1mol atom electrons =?

=6.022 x 10^23 x 10

=6.022 x 10^24

We know, the atomic mass of water is 18 gmso, 1 mol water=18 gm waterWe know that there are 6.022*10^23 molecule in 1 mol anything gases or others...so in 18 gm water there is 6.022*10^23 molecule

It is S-S bond because sulphur forms stronger covalent bond than Se and Te .

-Also S-S bond is stabilized and less effective in Se and Te due to full filled d-orbitals.

-Also, the non bonding electron pair of O-O bonds have strong repulsion which makes it weak in comparison with S-S bond.

-So, the S-S bond has highest bond energy.

Hence the answer will be option d S-S

Your question's answer is S-S bond

ENTHALPY OF REACTION[2ΔHf(ZnO (s)) + 2ΔHf(SO2 (g))] - [2ΔHf(ZnS (s sphalerite)) + 3ΔHf(O2 (g))][2(-348.28) + 2(-296.83)] - [2(-205.98) + 3(0)] = -878.26 kJ-878.26 kJ (exothermic)ENTROPY CHANGE[2ΔSf(ZnO (s)) + 2ΔSf(SO2 (g))] - [2ΔSf(ZnS (s sphalerite)) + 3ΔSf(O2 (g))][2(43.64) + 2(248.11)] - [2(57.74) + 3(205.03)] = -147.07 J/K-147.07 J/K (decrease in entropy)FREE ENERGY OF REACTION (AT 298.15 K)From ΔGf° values:[2ΔGf(ZnO (s)) + 2ΔGf(SO2 (g))] - [2ΔGf(ZnS (s sphalerite)) + 3ΔGf(O2 (g))][2(-318.32) + 2(-300.19)] - [2(-201.29) + 3(0)] = -834.44 kJ-834.44 kJ (spontaneous)From ΔG = ΔH - TΔS:-834.41 kJ (spontaneous)

An aldol condensation is a condensation reaction in organic chemistry in which an enol or an enolate ion reacts with a carbonyl compound to form a β-hydroxyaldehyde or β-hydroxyketone, followed by dehydration to give a conjugated enone

b)The reaction begins with hydroxide attack on the carbonyl carbon followed by deprotonation to give a dianion.This unstable intermediate releases a hydride anion which attacks another molecule of aldehyde.

In this process the dianion converts to a carboxylate anion and the aldehyde to an alkoxide.

The alkoxide then picks up a proton from water to provide the alcohol final product, while the caboxylate is converted to the carboxylic acid product after acid work-up

c)

Condensation is the change of the physical state of matter from gas phase into liquid phase, and is the reverse of evaporation. The word most often refers to the water cycle.

all of these have 10 electronselectrons in N=7;e in N-3=7+3=10electrons in O=8;e in O-²=8+2=10e in F=9;e in F-¹=9+1=10e in Na=11;e in Na+=11-1=10e in Mg=12;e in Mg+²=12-2=10e in Al=13;e in Al+³=13-3=10

hi.

Artificial satellitesare used to study the Earth, other planets, to helpuscommunicate, and even to observe the distant Universe.Satellitescan even have people in them, like the International Space Station and the Space Shuttle. The firstartificial satellitewas the Soviet Sputnik 1 mission, launched in 1957.

In theatmosphere,waterexists as a gas (watervapor from evaporation), as a liquid (droplets of rain and liquidwaterthat coats solid particles), and as a solid (snow and ice).

In Atmosphere water is present in Gas

Total number of lone pair of electrons on N₂O₃ is 8

Phenol is an unsaturated aromatic alcohol, while ethanol is saturated aliphatic alcohol. Ethanol reacts with triiodomethane (iodoform test) and forms yellow precipitate, while phenol does not give this test. Phenol has benzene ring it under goes diazo coupling reaction, while ethanol does not give this test.

2) is the answer.Because CHO is a meta directing group .

The resistivity of copper and aluminium are very low, so electric current flows easily through them. Hence copper and aluminum wires are usually used for electricity transmission.

cathode is the correct

Thanku very much

1cm³ = 1 ml

as 1 L = 1000mL

Therefore

1 L = 1000 cm³

we know 1 m = 100 cm

= 1 L = 1000 x (10 ^-2 m)³

= 10 ^ -3 m³

as the jug contains 2L of milk therefore,

2 L = 2 x 10³ m³

Hence, the jug contains 2 x 10 ^ -3 m³ of milk.

Rate law is [A]° [B]^1

pl please send me recent question

Atmospheric refractionis the deviation of light or other electromagnetic wave from a straight line as it passes through theatmospheredue to the variation in air density as a function of height.

BF3, NH4+, H+ are lewis acids because these are electron deficient and accept lone pair of electronsDepends on the reaction. Water can function as both a Lewis base or acid while OH- is a Lewis base. H+ is always a Lewis acid

BF3 , BeH2 AlCl3 are Lewis acid s

A. In biology, tissue is a cellular organizational level between cells and a complete organ. A tissue is an ensemble of similar cells and their extracellular matrix from the same origin that together carry out a specific function. Organs are then formed by the functional grouping together of multiple tissues.‎B. A meristem is the tissue in most plants containing undifferentiated cells, found in zones of the plant where growth can take place. Meristematic cells give rise to various organs of a plant and are responsible for growth.

C. Dermal tissue basically is epidermal tissue made up of cells which are protective in function. It can be seen in stems, leaves and roots. These tissues make up the outer covering of the organism to protect the underlying tissues. They are also secretory in function in some organs. Dermal tissue is sometimes covered by another layer called as cuticle. Some cells of the dermal tissue possess stomata which are guarded by guard cells.

Magnesium chloride is an ionic compound.So, it will notconduct electricityin solid state since its ions are tightly held in the lattice but in molten state and in aqueous solution, it willconduct electricitysince its ions will be free to move and thusconduct electricity.similarly for NaCl but it conducts electricity in molten state when it's ions are freeYes sodium sulphideconducts electricity. Itcandissociate in water to form ions toconduct electricity

ccl4 is a covalent compound so it does not form ions hence cannot conduct electricity

Acids have a pH of less than 7. Bases have a pH of more than 7. When bases are dissolved in water, they are known as alkalis. Salts are made when an acid reacts with a base, carbonate or metal.

An acid is a molecule or ion capable of donating a hydron, or, alternatively, capable of forming a covalent bond with an electron pair. The first category of acids is the proton donors or Brønsted acids.

thanks for the answer

The bases are substances that, in aqueous solution, release hydroxide (OH−) ions, are slippery to the touch, can taste bitter if an alkali,[1] change the color of indicators (e.g., turn red litmus paper blue), react with acids to form salts, promote certain chemical reactions (base catalysis), accept protons from any proton donor, and/or contain completely or partially displaceable OH− ions.

Democracy is a system in which the government of a country is elected by the people. majority rule- it is the system of government which is based on parlimentary majority representative elections- Public is allowed to elect representatives to speak for their view and interest

democracy is the crazy Hanis the system that government control in electric by the people mast of rules it is a system of government which is the based on principles on manually requirement electrical public around two electric requirement and speak for their visual and individual

Democracy is a form of government in which the ruling power is vested in the hands of the people , and the government is answerable to the people, who can change it through constitutional means.

Features of a democracy1- The Government is elected by the people, and it is answerable to the people2- There is free and fair electrol competition

is the correct answer is

The mainfeaturesof aDemocracyare as follows:

Majority Rule–It isthe system of government which is based on parliamentary majorities. Representative Elections- Here public is allowed to elect represtatives to speak for their views and interests.

Democracy is the form of government in which the rulers are elected by tge people.Democracy is based on consulation.It has several features-1) In democratic countries,rulers are elected by the people.2) The opposition parties are allowed to function freely before and after the election.

Democracy is the form of the government in which the rulers are elected by the people.its features1. all the 18th yaers citizen write to vote freedom 2. the final decisions making power rest which those elected by the people.

Democracy is a system of government where the citizens exercise power by voting. In a direct democracy, the citizens as a whole form a governing body and vote directly on each issue. In a representative democracy the citizens elect representatives from among themselves

Democracy is the form of government in which the people elect their representatives for ruling.The election should be held in free and fair manner.

Democracy is the form of government in which the rulers are elected by the people

The main two features of democracy is follow as

1. In democracy the final decision making power must rest with those elected by the people.

2. In a democracy each adult citizen must have one vote and each vote must have one value

Democracy(Greek:δημοκρατίαdēmokratía, literally "rule by people") is a system ofgovernmentwhere the citizens exercise power byvoting. In adirect democracy, the citizens as a whole form a governing body and vote directly on each issue. In arepresentative democracythe citizens elect representatives from among themselves. These representatives meet to form a governing body, such as alegislature. In aconstitutional democracythe powers of the majority are exercised within the framework of a representative democracy, but the constitution limits the majority and protects

democracy is a form of government for the people by the people to the peopletwo featureit is chosen by people if they don't satisfy then they can remove it

the correct answer is option c because a fully filled orbital gives more stability to the atom of bigger size.

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