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C2 is diamagnetic as it has all electrons paired.N2 is also diamagneticB2 is paramagnetic..has 2 unpaired electron

haw to calculate unpaired electron

Option (b)NO is correct because it contains unpaired electrons.

MOT

Answer:D)Explanation:

When acetic acid reacts with sodium bicarbonate carbon dioxide gas is evolved. It is colourless and odourless. CH3COOH + NaHCO3------> CH3COONa+ CO2+H2OLike if you find it useful

Polymerization is a process of reacting monomer molecules together in a chemical reaction to form polymer chains or three-dimensional networks. There are many forms of polymerization and different systems exist to categorize them.

option (b) is correct.

2propanamine some 3carban h to propen ho gya aur nh2 ko amine कहते h

b) 2-aminopropane it is the right answer

A.dimethyl amine is the correct answer

Cu2+has an unpaired electron (its configuration is [Ar] 3d9),whereas Zn2+has all paired electrons (configuration [Ar] 3d10).

Also, the unpaired electron in the copper ion allows electron transition in the visible region to take place, so the ion iscoloured.

H2 that is option b is diamagnetic

IUPAC name of CH3COCH3 is acetone also known as propanone or dimethyl ketone .

Given thatRate = k [CH3OCH3]3/2In this problem pressure is in bar and time in minutes so that Unit of rate = bar min−1Given that Rate = k [CH3OCH3]3/2unit of k = unit of rate / unit of [CH3OCH3]3/2Hence unit of K = bar min-1/ bar3/2= bar-1/2min-1

what is disastrous the same time as

ait is the answer because after heterolytic fission free radicle ppresent

Substances called Initiators which generate the chain – initiating species. Initiator molecules contain O – O or S – S or N – O bonds. [Initiators are of peroxide type (containing O – O bonds)]. Some examples of initiators, (i) Acetyl peroxide (AC2O2) (ii) Benzoyl peroxide (BZ2O2 (iii) 2, 2’ – Azobis – isobutronitrile (AIBN) Production of chain initiating species by initiators is explained as follows I2 -------> 2 I. where I is initiator II) Propagation Here the initiator attack the butadiene and further polymerisation occur and the carbon chain grows (iii) Termination Chain termination is brought about by bimolecular reaction between reactive radical centres. coupling or combination Free – radical of one – chain combines with free – radical of another to form a covalent bond.

Substances called Initiators which generate the chain – initiating species. Initiator molecules contain O – O or S – S or N – O bonds. [Initiators are of peroxide type (containing O – O bonds)]. Some examples of initiators,

(i) Acetyl peroxide (AC2O2)

(ii) Benzoyl peroxide (BZ2O2 (iii) 2, 2’ – Azobis – isobutronitrile (AIBN) Production of chain initiating species by initiators is explained as follows I2 -------> 2 I. where I is initiator II) Propagation Here the initiator attack the butadiene and further polymerisation occur and the carbon chain grows

(iii) Termination Chain termination is brought about by bimolecular reaction between reactive radical centres. coupling or combination Free – radical of one – chain combines with free – radical of another to form a covalent bond.

Atomic number is defined as the number of protons that a chemical element has in its nucleus.

ans is na=59;S=95;O=16

The sum of total number of protons and electrons present in the nucleus of atom is called as atomic mass unit

A unit of mass used to express atomic and molecular weights, equal to one twelfth of the mass of an atom of carbon 12

Magnesium nitride= Mg3N2Ammonium sulphate = (NH4)2So4

CO2islinearand theSO2structure isbent, becauseCO2has a negative oxygen on each side of the positive carbon they cancel each other out. In theSO2structure the oxygen arenotin lined with each other which means there a positive and negative end.

Moles will be 2*10^24/6.023*10^23=3.3 moles

A lichen is a composite organism that arises from algae or cyanobacteria living among filaments of multiple fungi species in a mutualistic relationship. The combined lichen has properties different from those of its component organisms. Lichens come in many colors, sizes, and forms.

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Precipitation reaction: It is a type of reaction in which a solid insoluble product aseperates out 8n a chemical reaction.eg, reaction between lead nitrate and potassium iodine forms insoluble ppt of lead iodine.

Examples of Double displacement reaction can be written in precipitation reaction.

some more explamples:👇👩‍🔬

343 = 7³

So, 343 can be cancelled by 7, 49

Mass of 1 mol of N2 = 28 g

So 22. 4 L of N2 = 28 g

So 2 L = 28 x 2 / 22.4 = 2.5 g

THE CORRECT ANSWER IS ALARGE HADRON COLLIDER

LARGE HADRON COLLIDER

Moles of hydrogen = 2/2 = 1 molTemperature = 27 + 273 = 300K

PV = nRTV = nRT / PV = (1 * 0.0821 * 300) / 4V = 6.1575 L

Colloid is not a substance but a state of substanceis a true statement because somesubstanceswhich are crystalloids under certain conditions can becolloidsunder the other, e.g. NaCl is a crystalloid in aqueous medium,butwhen mixed with benzene, it behaves as acolloid.

EQUIVALENT MASS IS SAME FOR ALL THE REACTION.

MOLECULAR MASS = 3 * 1 + 1 * 31 + 4 * 16

= 3 + 31 + 64 = 98

EQUIVALENT MASS = MOLECULAR MASS / NO. OF REPLACEABLE HYDROGEN ATOMS

= 98 /2

= 49

★ Change in colour:Fe(s) + CuSO4 (aq) -----> FeSO4 (aq) + Cu(s)Blue colour solution changes into green colour solution due to displacement reaction.

★ Change in temperature:CaO(s) + H2O (l) -----> Ca(OH)2 + HeatTemperature increases means changes due to exothermic reaction.

★ Formation of precipitate:Pb(NO3)2 (aq) + 2KI(aq) ------> PbI2(s)↓ + 2KNO3(aq)PbI2 is a precipitate formed due to precipitation reaction or double displacement reaction.

From the question , at a given time t

for A , the [A] left is 100-94 = 6% so, K1 = ln(100/6)/t => t = ln(100/6)/k1....(1)

and for B , the [B] is 50% so, K2 = ln(100/50)/t => t = ln2/k2.....(2)

equating 1 and 2

we get , k1/k2 = ln(100/6)/ln2 = 2.81/0.6931 = 4.05889 = 4.06 answer

option 1

The mole ratio is equal to the volume ratio.Let V be the volume of N₂O so (V/8.96)=(1/2)=V=(8.96/2)=V=4.48 litres(ANS)

a)The iron nails will corrode due to the effect of oxygen and water on iron. The color of the iron nails will change to reddish-brown.b)supply of oxygen and waterc)Redox reaction(oxidation-reduction)d)galvanization,spraying wax or oil, keeping iron separate from oxygen+water.

a) It starts to rustb) Both water and oxygen are needed for rusting to occur. c) Oxygen and iron, which are the reactants, combine to form a product called iron oxide(rust).d) Paint the nail to avoid contact with water or air.

tq

molecular mass of CaCO3 = 100gm so, here number of moles are = 50/100 = 0.5

molecular mass of H3PO4 is = 98 so, moles = 73.5/98 = 0.75

now , balanced equation is 3CaCO3+2H3PO4=Ca3(PO4)2+3H2CO3

and since 0.5/3 is smaller that 0.75/2 , so CaCO3 is the limiting reagent

now amount of Ca3(PO4)2 , will be = 0.5/3 = 0.1666.. moles

and the amount of H3PO4 reacted is 2*0.5/3 = 0.3333.

at the end , all CaCO3 will react

so, moles of H3PO4 left will be 0.75-0.33 = 0.42

no..of atoms is directly proportional to the number of moles

so, in option C , 0.25 moles of Cu will have mass = 0.25*63.5 = 15.875 gms.. this is maximum of all.

so, option C is correct.

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Mercury is the only liquid metal and bromine is the only liquid non-metal. Two gaseous non-metals are hydrogen and nitrogen.

There are many types of primary pollutants, including carbon oxides,nitrogen oxides,sulfur oxides,particulates,lead, and volatile organic compounds. Secondary pollutants form from chemical reactions that occur when pollution is exposed to sunlight