Explore topic-wise InterviewSolutions in .

carbon has an atomic no. 12hence, it has 6 electrons.

and since half of the electrons spin opposite direction, at max. 3 electrons can have +1/2 configuration

Orbital, in chemistry and physics, a mathematical expression, called a wave function, that describes properties characteristic of no more than two electrons in the vicinity of an atomic nucleus or of a system of nuclei as in a molecule. A 1s electron occupies the energy level nearest the nucleus.

N20- , will provide -M effect in the benzene and that is strongest when N20- is attached at para position.

while Ch3- will give +I effect , that reduces acidic strength

so, order will be 5<3<1<2<4

p-nitrophenol > phenol > p-cresol

Size of the hybrid orbitals: Since s-orbitals are closer to the nucleus than p-orbitals, it is reasonable to expect that greater the scharacter of an orbital the smaller it is. Thus the decreasing order of the size of the three hybrid orbitals is opposite to that of the decreasing order of orbital character in the three hybrid orbitals.

sp3> sp2> sp

option 1.

Mole can be defined as a unit which represents 6.023 x1023particles ofsamematter. A mole (symbol mol) is defined as theamount of substancethat contains as many atoms, molecules, ions, electrons or anyotherelementary entities as there are carbon atoms in exactly 12 gm of .

Mole can be defined as a unit which represents 6.023 x1023particles of same matter. A mole (symbol mol) is defined as the amount of substance that contains as many atoms, molecules, ions, electrons

1)Metal prices are polished before the experiment because to remove the topmost layer of it as when the metal is burnt the metal oxide will prevent the metal piece from further oxidation..

2)Sodium ion is already stable so it won't react while sodium atom is unstable and reactive and tends to lose one of its electrons. Sodium of table salt does not react with water like sodium metal BECAUSE it separates from chlorine as ionic sodium and ionic sodium is stable and it is solvated hence it does not react.

In a displacementreaction, a more reactivemetalcan displace a less reactivemetalfromits salt solution. Thereactionis often known asmetal displacementreaction. ... The elementspotassium, sodium, lithium and calcium are very reactive and they reactwith cold water to produce hydroxides and hydrogen gas.That is why each metal react to its own salt.

Corrosion on theterminalsis due to hydrogen gas being released from the acid in thebattery. It mixes with otherthingsin the atmosphere under the hood and produces the corrosion you see on theterminals.

Battery terminalcorrosion is easy to identify. It's the white,greenor bluish stuff on your vehiclesbatteryposts,battery terminalsorbatterycables. The white substance which you see aroundbattery terminalsis either lead sulfate or anhydrous copper sulfate.

Answer

Adsorption is always exothermic. This statement can be explained in two ways.(i) Adsorption leads to a decrease in the residual forces on the surface of the adsorbent. This causes a decrease in the surface energy of the adsorbent. Therefore, adsorption is always exothermic.

(ii) ΔH of adsorption is always negative. When a gas is adsorbed on a solid surface, its movement is restricted leading to a decrease in the entropy of the gas i.e., ΔS is negative. Now for a process to be spontaneous, ΔG should be negative.ΔG = ΔH - TΔSSince ΔS is negative, ΔH has to be negative to make ΔG negative. Hence, adsorption is always exothermic.

This causes a decrease in the surface energy of the adsorbent. Therefore,adsorptionisalways exothermic. ... When a gas isadsorbedon a solid surface, its movement is restricted leading to a decrease in the entropy of the gas i.e., ΔS is negative. Now for a process to be spontaneous, ΔG should be negative.

Adsorption is always exothermic, this statement can be explained by two.i) Adsorption leads to a decrease in the residual forces on the surface of the adsorption.This cause a decrease in the surface energy of the adsorption therefore adsorption is always exothermic.ii)ΔH of adsorption is always negtive.When a gas is adsorbed on a soild surface its movement is restricted leading to decrease in the entropy of the gas i.e.ΔSAdsorption is accompanised by decrease in entropy, i.e., ΔS = – ve. If it is spontaneous then ΔG should be negative.ΔG = ΔH – TΔSSince ΔS is – ve, ΔG will be – ve only ifΔH = – ve, i.e., if process is exothermic.

This causes a decrease in the surface energy of the adsorbent. Therefore,adsorptionisalways exothermic. ... When a gas isadsorbedon a solid surface, its movement is restricted leading to a decrease in the entropy of the gas i.e., ΔS is negative. Now for a process to be spontaneous, ΔG should be negative.

This causes a decrease in the surface energy of the adsorbent. Therefore,adsorptionisalways exothermic. ... When a gas isadsorbedon a solid surface, its movement is restricted leading to a decrease in the entropy of the gas i.e., ΔS is negative. Now for a process to be spontaneous, ΔG should be negative.

Adsorption leads to a decrease in the residual forces on the surface of the adsorbent. This causes a decrease in the surface energy of the adsorbent. Therefore, adsorption is always exothermic.

(ii) ΔH of adsorption is always negative. When a gas is adsorbed on a solid surface, its movement is restricted leading to a decrease in the entropy of the gas i.e., ΔS is negative. Now for a process to be spontaneous, ΔG should be negative.

ΔG = ΔH - TΔS

Since ΔS is negative, ΔH has to be negative to make ΔG negative. Hence, adsorption is always exothermic.

When anant bites, it injects this formic acid into theskin. This causes pain.

Calaminesolutioncontains zinc carbonate which is a base.

Calamine solutionneutralise the effect of acid ofant bitewhenapplied on the skin.

Ant sting contains formic acid. When an ant bites, it injects this formic acid into the skin. This causes pain. Calamine solution contains zinc carbonate which is a base. Calamine solution neutralise the effect of acid of ant bite when applied on the skin.

Calamineis a historic name for anoreof zinc. The namecalaminewas derived from lapis calaminaris, a Latin corruption of Greek cadmia (καδμία), the old name for zincoresin general. The name of the Belgian town of Kelmis, LaCalaminein French, which was home to a zinc mine, comes from that.

x/m = adsorption per gram of adsorbent which is obtained be dividing the amount of adsorbate (x) by the weight of the adsorbent (m).

cu + feso4 -> cu + feso4no change occurs in this reaction.so d is wrong reaction.

Ans :- zinc - calamine Lead - Galenaaluminum - Bauxite

Calamine is a historic name for an ore ofzinc. The name calamine was derived fromlapis calaminaris, a Latin corruption of Greekcadmia(καδμία), the old name forzincores in general. The name of the Belgian town of Kelmis, La Calamine in French, which was home to azinc mine, comes from that.

The answer is option A

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option B is the answer.Galena is an ore of lead Pb.

Importanceand production ofradial magnetic field: In aradial magnetic field,magnetictorque remains maximum for all positions of thecoils.

Zinc-CalamineLead-Galenaaluminium- Bauxite

130 is thr appropriate measure

130 is the appropriate measure

130 is the appropriate

130 is the appropriate measure

130 is the appropriate measure

130 is the appropriate measure

13.1inches = 13.1×2.53 = 33.27cm

now volume of cube = a³ = (33.27)³ = 36,839.6 cm³

also 1ml = 1cm³

so, volume in ml = 36,839.6 ml

Magnification produced by a concave mirror is always positive.m = -v/uFor concave mirror, v is +ve and u is -ve. Therefore m is positive.

Lubricationused ForInternal Combustion Engine. The mainfunction of lubricantis to, 1. To reduce friction and wear between the parts having relative motion by minimizing the force of friction and ensures smooth running of parts

Graphiteis a mineral made of loosely bonded sheets of carbon atoms, giving it a slippery texture that makes it a very effectivelubricant. This slippery quality also makesgraphiteagoodmaterial for pencil lead because it easily sloughs off onto paper.

Theterm echinodermata originatedfrom greekword, echinos which means hedgehog, and derma means skin. Thus, these are spiny skinned organisms.

They are anymarineanimaloftheinvertebratephylumEchinodermata,havingaradiatingarrangementofpartsandabodywallstiffenedbycalcareouspiecesthatmayprotrudeasspinesandincludingthestarfishes,seaurchins,seacucumbers,etc.

Sulfur belongsto the chalcogen family

cast iron belongs to ferrous metal

Here we have ρ = 2.64 gdm-3 = 2.64 gL-1

Pressure P = 775 mm = 775 / 760 atm = 1.02 atm

T = 3100 C = 310 + 273 = 583 K

R = 0.0821 litre atm-1K-1mol-1

now PV = nRT

= (mass / molar mass) X RT

Thus Molar mass of phosphorus molecule = [mass / (P X volume )] X RT

= (ρ RT) / P

= (2.64 X 0.0821 X 583 ) / 1.02

= 123.88 g

Molar mass of 1 phosphorus atom = 31 g

Therefore 123.88 / 31 = 4

This means that 4 atoms of phosphorus constitute a molecule of phosphorus. Hence the molecular formula of phosphorus is P4

Here we have ρ = 2.64 gdm-3 = 2.64 gL-1

Pressure P = 775 mm = 775 / 760 atm = 1.02 atm

T = 3100 C = 310 + 273 = 583 K

R = 0.0821 litre atm-1K-1mol-1

now PV = nRT

= (mass / molar mass) X RT

Thus Molar mass of phosphorus molecule = [mass / (P X volume )] X RT

= (ρ RT) / P

= (2.64 X 0.0821 X 583 ) / 1.02

= 123.88 g

Molar mass of 1 phosphorus atom = 31 g

Therefore 123.88 / 31 = 4

This means that 4 atoms of phosphorus constitute a molecule of phosphorus. Hence the molecular formula of phosphorus is P4

1. The wine which is edible isextracted from ethanol.2.The ethanol can also be usedas fuel for energy

Thanks

1. Ethanol is used in medical wipes and most common antibacterial hand sanitizer gels as an antiseptic.2.The alcohol that we drink is simply ethanol.3.It is also used as a fuel.

Thanks

you are welcome.

It is my pleasure

☺️☺️☺️.

🤗🤗🤗🤗

🤗🤗🤗🤗

An electrically charged particle formed by an aggregate of molecules and occurring in certain colloidal electrolyte solutions, as those of soaps and detergents.

bhai thoda ora easy plz

when soap or detergent mixed in water it forms a solid aggregate of soap molecule called micelle

Cleansing action of Soaps and detergentsMost of the dirt is oily in nature and oil does not dissolve in water. The molecule of soap constitutes sodium or potassium salts of long chain carboxylic acids. In the case of soaps, the carbon chain dissolves in oil and the ionic end dissolves in water. Thus the soap molecules form structures called micelles .In micelles, one end is towards the oil droplet and the other end which is the ionic faces outside. Therefore, it forms an emulsion in water and helps in dissolving the dirt when we wash our clothes.

Soap is a kind of molecule in which both the ends have different properties.

Hydrophilic endHydrophobic end

The first one is the hydrophilic end which dissolves water and is attracted towards it whereas the second one is the hydrophobic end that is dissolved in hydrocarbons and is water repulsive in nature. If on the surface of the water, soap is present then the hydrophobic tail which is not soluble in water will align along the water surface.

MICELLES In water, the soap molecule is uniquely oriented which helps to keep the hydrocarbon part outside the water. When the clusters of molecules are formed then hydrophobic tail comes at the interior of the cluster and the ionic end comes at the surface of the cluster and this formation is called micelle. When the soap is in the form of micelles then it has the ability to clean the oily dirt which gets accumulated at the center. These micelles remain as a colloidal solutions. Therefore the dirt from the cloth is easily washed away. The soap solution appears cloudy as it forms a colloidal solution which scatters light.

When soap molecules are present in water, the molecules arrange themselves in the form of a cluster in such a manner that their hydrophobic ends are away from the water molecules and their hydrophilic or ionic ends are towards the water molecules, as shown in the figure. This is known as micelle formations.

Cleaning action of soaps:

The dirt (oil and grease) present on clothes is organic in nature, and insoluble in water. Hence, it cannot be removed only by washing with water. When soap is dissolved in water, its hydrophobic ends attach themselves to the dirt and remove it from the cloth.

Then, the molecules of soap arrange themselves in micelle formation and trap the dirt at the centre of the cluster. These micelles remain suspended in water like particles in a colloidal solution. The various micelles present in water do not come together to form a precipitate as each micelle repels the others because of ion-ion repulsion. Thus, the dust particles remain trapped in the micelles (which remain suspended), and are easily rinsed away by water. Hence, soap micelles remove the dirt by dissolving it in water.

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A Class D fire is characterised by the presence of burning metals.

Only certain metals are flammable and examples of combustible metals includesodium,potassium,uranium,lithium,plutoniumandcalcium, with the most common Class D fires involvemagnesiumandtitanium.

Berylliumshowsresemblance with itsdiagonallyopposite element aluminium.

Ans :- Diagonal relationship of Be with Al Because of its small size Be differs from other earth alkaline earth metals but resembles in many of its properties with Al on account of diagonal relationship. (1) Be2+ and Al3+ have almost same and smaller size and thus favour for covalent bonding. (2) Both these form covalent compounds having low melting point and soluble in organic solvent.

White phosphorus catches fire suddenly in the air at around 35°C. As you can notice, this temperature is marginally higher than the normal room temperature. This is the reason why it is kept in water. After combustion, it produces phosphorus pentoxideP4 + 5O2 → 2P2O5 or P4O10

Hard Water. Detergent cleans more effectively in hard water than soap. Detergent cleans more effectively in hard water than soap. Hard water contains calcium and magnesium ions that limit soap's cleaning capabilities.

hard water is the advantage of a detergent over soap

आमतौर पर माचिस की तिली आसानी से आग पकड़ने वाली लकड़ी की बनी होती है। इसके एक सिरे पर किसी फास्फोरस-युक्त पदार्थ का लेप किया गया होता है। इस सिरे को किसी घर्षणयुक्त तल परगढ़ने से आग उत्पन्न हो जाती है। माचिस की तीलियों के सिरे पर फास्फोरसयुक्त पदार्थ का लेप करने के लिये जिलेटिन (Gelatin) का उपयोग किया जाता है। ये तीलियाँ किसी लकड़ी के छोटे से बक्से या कागज में रखकर उपयोग में आती हैं। लकड़ी के बक्से के उपर ही एक तल पर घर्षणयुक्त तल बनाया गया होता है।

आमतौर पर माचिस की तिली आसानी से आग पकड़ने वाली लकड़ी की बनी होती है। इसके एक सिरे पर किसी फास्फोरस-युक्त पदार्थ का लेप किया गया होता है। इस सिरे को किसी घर्षणयुक्त तल परगढ़ने से आग उत्पन्न हो जाती है। माचिस की तीलियों के सिरे पर फास्फोरसयुक्त पदार्थ का लेप करने के लिये जिलेटिन (Gelatin) का उपयोग किया जाता है। ये तीलियाँ किसी लकड़ी के छोटे से बक्से या कागज में रखकर उपयोग में आती हैं। लकड़ी के बक्से के उपर ही एक तल पर घर्षणयुक्त तल बनाया गया होता है। [संपादित करें][संपादित करें]

we should wear cotton clothes in summer because it absorb sweat and cools down our body

We should wearcottonclothes and light coloured clothes in summers. We sweat a lot in summers.Cottonis a good absorber ofwater. Thus, it absorbs sweat from ourbodyand exposes the sweat to the atmosphere, making its evaporation faster.

did u mean.. explain the saytzeff's rule with example

According to this rule although alkene synthesis leads to the formation of more than one product, the more substituted alkene is the major product

According to this rule although alkene synthesis leads to the formation of more than one product, the more substituted alkene is the major product

For example, when 2-iodobutane is treated with alcoholicpotassium hydroxide(KOH),buteneis the major product andbuteneis the minor product.