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iii.

i.CO+H2

ii.

May 1932:Chadwickreports thediscoveryof theneutron

thnks

Adesert coolercoolsbetter on a hot dry daybecause on ahot dry daytemperature is high and humidity is less which helps inbetterevaporation. Due to the higher rate of evaporation it givesbetter coolingeffect.

Chlorine would react with KBr to produce Kcl solution and Br2 gas would be liberated out.

Chlorine is more reactive than bromine. Or in other words, chlorine is more powerful oxidising agent than bromine.

Hence it displaces bromine from KBr

no understand

chlorofluorocarbons (CFCs) are the main cause of depletion of ozone later

carbon dioxide because it makes hole in ozone layer

since sulphuric acid is oxidizing agent . so sulphuric acid itself will reduce , by gaining electrons. so, option 4. is having both oxidation and reduction of S. This is the correct answer.

answer(2)---opction (c) is correct answer .answer(3)--- option (b) is correct answer.

2) carbon3) hydrocarbons

2 answer - Carbon 3 answer - Hydrocarbons

C_2 H_2+(2+2/4) O_2→2CO_2+H_2 OC_3 H_8+(3+8/4) O_2→3CO_2+4H_2 Ox+y=802x+3y=2302(80-y)+3y=230y=70.The fraction of C3H8 in the mixture is70/80 100%=87.5%

in option (a) adsorption takes placeanhydrous CaCl2 absorb water to form CaCl2.2H2O or CaCl2.6H2O which is a bulk phenomenon but water(vapour) is adsorbed on surface of silica gel as a surface phenomenon

Saturated hydrocarbonsare the compounds containing only single covalent bonds. These are also known as alkanes. ...Hydrocarbonswith triple bondsbetweencarbon atoms are known as alkynes. These compounds have more number of hydrogen atoms when compared to its correspondingunsaturated hydrocarbons.

Ethane has 7 covalent bonds. 6 C -H bond1 C-C bond

18K gold is 75% gold mixed with 25% of other metals like copper, silver etc. Usually, studded jewelry and other diamond jewelry is made in 18K gold.

Unsaturated hydrocarbons are the straight chain compounds containing double or triple covalent bonds.Hydrocarbons with a double bond between carbon atoms are known as alkenes.Hydrocarbons with triple bonds between carbon atoms are known as alkynes.

Saturated hydrocarbons are the compounds containing only single covalent bonds. These are also known as alkanes.

Ehene is an unsaturated hydrocarbon as it contains a double covalent bond between two carbon atoms.

Presence of un-saturation or double covalent bond can be distinguished with the help of bromine solution in CCl4. It is an orange colour solution which shows colour change after addition in ethene solution.

The orange colour disappears because of formation of the colourless ethylene dibromide

(CH2Br─CH2Br). It is an addition reaction of ethene due to presence of double covalent bond in the molecule.

CH2= CH2 + Br2→ CH2Br─CH2Br

Ethane is a saturated hydrocarbon and cannot show this test. It burns with a clear flame whereas unsaturated hydrocarbons burn with yellow flame and lots of black smoke.

if we take addition reaction as basis thenunsaturated compound are more reactive because they combine with hydrogen in presence of catalyst like nickle and PD to form saturated compound.

C2H4 + H2 --------ni/PD ------ C2H6

Nucleophileis a chemical species that donates an electron pair to anelectrophileto form a chemical bond in relation to a reaction. All molecules or ions with a free pair of electrons or at least one pi bond can act asnucleophiles.

It depends on Carbon to hydrogen ratio.

The molecules which contains alomsot equal number of Carbon and hydrogens willburnswith sootyflame(in complete combustion).

It is not full and

It is not full and

3,3,4-diethyl-4-propyl-heptane

Please can you explain

alkane:-methane, propane ,etc

alkaline :-propyne, butyne,etc

alkine:-methene,propene etc

The correct answer is option(b) 4.

Methane(CH4)

Explanation:A hydrocarbon is an organic composition that contains only carbon and hydrogen atoms. With just one carbon atom and four hydrogen atoms, methane (CH4) is the simplest hydrocarbon.

(1) cyclopropane(2) cyclobutane

Atomic mass is the is the sum of the electrons and the neutrons in the atom. Number of electrons is the atomic number. Hence to determine the atomic mass the reference of the atom is required.

Example to find the atomic mass of atom magnesium Mg we need to know the atomic number of magnesium.

atomic number of magnesium atom is 12 = number of electrons

number of neutrons in the nucleus of magnesium atom is 12

the atomic mass of magnesium atom is 24 (sum of electrons and neutrons)

hitesh gdfdff hffyvcdg hgfccv hhffcvhh ghvcfgv ggfxcg ggccv ggcv ggvv ggvvv hv gv h ggvhhg

Esters are organic compounds having the general formula RCOOR’ where R is H or any alkyl group whereas R’ is always an alkyl group.

RCOOH + RˈOH → RCOORˈ (ester) + H₂O

They posses sweet odour so, that they are used in cosmetics.

Ex:Reaction of ethanoic acid with ethyl alcohol produces ethyl acetate. Formation of ethyl acetate (ester) indicates sweet smell.CH₃COOH+ C₂H₅OH →CH₃COOC₂H₅ +H20

Thnq

Ionic bond.Ionic bond, also called electrovalentbond, type of linkageformedfrom the electrostatic attraction between oppositely chargedionsin a chemicalcompound. ... The atom that loses the electrons becomes a positively charged ion (cation), while the one that gains them becomes a negatively charged ion (anion)

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alkynes contain a carbon-carbon triple bond.(c) is correct

Tetraammineplatinum(II) chloride react with potassium tetrachloridoplatinate(II) to produce tetraammineplatinum(II) tetrachloridoplatinate(II) and potassium chloride.

option 2. is the correct.answer.

because only phosphorus contains.. 3d orbitals out of these compounds.

and that is present in option 2

Chromium has six valence electrons.

Valence electrons are located on the outermost shell, or energy level, of an atom. According to the Aufbau principle (also known as the building-up principle), electrons tend to fill the lowest available energy levels before starting to fill the higher energy levels. In cases where there are multiple orbitals of the same energy level, electrons fill up the unoccupied levels before having to pair with other electrons.

Like chromium, copper and palladium are some of the elements that do not follow the general rule. For chromium, the 4s shell is lower on the orbital than the 3d shell. When the electrons are filling up the energy levels, both the 3d shell and the 4s shell have one electron in their orbitals. This is because electrons tend to occupy energy levels that are not already occupied before they start pairing. However, this means that there are valence electrons in both the 3d shell and the 4s shell.

there are total of6valence electrons for chromium.

For standard electrochemicalcells1: A redoxreaction is spontaneousif the standard electrode potential for the redoxreaction, Eo(redoxreaction), is positive. ... If Eo(redoxreaction)is negative (Eo(redoxreaction)< 0), thereactionwill not proceed in the forward direction (non-spontaneous

answer is B=p/∆v/v is correct

Given: Quadrilateral ABCD in which diagonals AC and BD intersects each other at O such that AO/BO = CO/DO.

To Prove: ABCD is a trapezium

Construction: Through O, draw line EO, where EO || AB, which meets AD at E.

Proof: In ΔDAB, we have

EO || AB

∴ DE/EA = DO/OB ...(i)[By using Basic Proportionality Theorem]

Also, AO/BO = CO/DO (Given)

⇒ AO/CO = BO/DO

⇒ CO/AO = BO/DO

⇒ DO/OB = CO/AO ...(ii)

From equation(i)and(ii), we get

DE/EA = CO/AO

Therefore, By using converse of Basic Proportionality Theorem, EO || DC also EO || AB

⇒ AB || DC.

Hence, quadrilateral ABCD is a trapezium with AB || CD.

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The force of attraction between particles of gas is negligible. Because of this, particles of gas move in all directions. Thus, a gas fills the vessel completely in which it is kept.

doesn't it change into liquid

It change into liquid only when condensed.

(a) Agas fills completely the vessel in which it is kept.

Answer: The force of attraction between particles ofgasis negligible. Because of this, particles of gasmove in all directions. ... Because of this agasexerts pressure on the walls of the container in which it is kept.

a) A triple bond has 2 pi bonds and double bond has one pi bond and rest are sigma bonds.

Thus total pi bonds =3

total sigma bonds = 9

b) A triple bond has 2 pi bonds and double bond has one pi bond and rest are sigma bonds.

Thus total pi bonds =2

total sigma bonds = 9

First ka ans?

the below structure is benzene

The given structure is of Benzene

the given structure is of benzene (C6H6)

Distilled water cannot conduct electricity because it does not contain ions while rain water conducts electricity as it contains ions due presence of dissolved salts in it.

X can be any carbonate salt except that of sodium, potassium and ammonium.

For example, let X be Calcium carbonate. The reaction is:CaCO3 + HCl ---------> CaCl2 + H2O + CO2

CO2 is a colourless and odourless gas and it comes out, bubbling (brisk effervescence is seen)

I)Syngas, or synthesis gas, is a fuel gas mixture consisting primarily of hydrogen, carbon monoxide, and very often some carbon dioxide. The name comes from its use as intermediates in creating synthetic natural gas and for producing ammonia or methanol.

ii)Thewater-gas shiftreaction (WGSR) describes the reaction of carbon monoxide andwatervapor to form carbon dioxide and hydrogen (the mixture of carbon monoxide and hydrogen (notwater) is known aswater gas)

iii) A fuel cell is an electrochemical cell that converts the potential energy from a fuel into electricity through an electrochemical reaction of hydrogen fuel with oxygen or another oxidizing agent.

Mixtures can be classified into three types: suspension mixture, colloidal mixture or solution, according to how they combine and can be separated. Suspension mixtures have larger solute particles, colloidal mixtures have much smaller particles, and particles in a solutions completely dissolve into the solvent