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The most probable velocity is 1 km/s. Most probable velocity is the velocity attained by fraction of maximum number of molecules of the gas.

Auxinis plant hormone which is synthesized at the tip of the shoot. It helps the cell grow longer. When atendrilcomes in contact with asupport,auxinstimulates fastergrowthof the cells on the opposite side that's why thetendrilforms a coil aroundthesupport.

option (a) is correct.

Adiabatic Process. An adiabatic process is one in which no heat is gained or lost by the system. The first law of thermodynamics with Q=0 shows that all the change in internal energy is in the form of work done.

Answer:(1)QuartzExplanationQuartz used as a Piezoelectric material Piezoelectric material are those that produce electric current when they are placed under mechenical stress

plz sent the complete question...

the given reaction is a combustion.reaction.

∆s is positive is the no. of moles of gases formed in the product side will be more than that of the reactant.

so, option 3 is the correct answer

thanks

why almirah is a solid

कांच से बनी रोजमर्रा की चीजें

in summer we wear cotton clothes because cotton cloths absorb the sweat and get feel you coool so we wear cotton clothes in summer

Higher productivity.

Wider adaptability.

Required agronomic characteristics.

Change in maturity.

Biotic and abiotic resistance.

The main aim behind the crop improvement is to improve the productivity of the crop and attain the maximum of profit by producing the maximum possible yield for the maximum profit ratio.

The blackboard dries up after wiping it because of the heat present in the atmosphere by process of evaporation

Ans :- It's nitric oxide, NO. NO is colorless but when it's exposed to air it is oxidized to NO2, which is a pungent, irritating, brown gas.

The Reaction Rate for a given chemical reaction is the measure of the change in concentration of the reactants or the change in concentration of the products per unit time.

Hence (c) is the correct option

4PH3 (g) = P4 (s)+ 6H2 (g) (Elemental phosphorus exists as tetraatomic molecules).

When the temperature and pressure remain the same, 4 ml of PH3 will give 6 ml of H2. (On applying Gay-Lussac's law ).

Hence, 100 ml of PH3 will yield 150 ml of H2.

Increase in volume = (150-100) ml = 50 ml. (The volume of solid phosphorus is negligible).

There is a 50% increase in volume.

a) glucose b)A glucocorticoid is a hormone that affects the metabolism of fats and proteins, but especially carbohydrates.c)collagensd)B vitamins are water-soluble vitamins, which means that what your body doesn't use is excreted in your urine.

Answer:4)63

Explanation:

20 ml of 0.1 N NaOH is required to neutralise 0.126 g of acid

So, 1000 ml of 0.1 NNaOH will neutralise =0.12620×10.1×1000g=63g

Therefore, gram equivalent of acid =63 g

The Prime Minister of India is the leader of the executive of the Government of India. The prime minister is also the chief adviser to the President of India and head of the Council of Ministers

Methyl alcohol or methanol share some similar characteristics with ethyl alcohol or ethanol. They are colorless liquids, with very good solubility in water. The difference is that methanol is highly poisonous. Drinking only small amount of methanol can lead to blindness, or death (10–100 ml). Both methanol and ethanol have a pleasant odor.

Ethanol is poisonous also, but only when consumed in large quantities. It is an ingredient of many beverages and it can cause an addiction.

Methanol can be used to create a formaldehyde or as a fuel.

Ethanol can be easily confused with methanol. You can distinguish those two by using the so calledIodoformtest. In an alkali environment and with iodine the ethanol will change to acetaldehyde. And acetaldehyde with iodine will provide yellow crystalline iodoform. The methanol does not react like this.

Atomic weight of Cu= 63.5Molecular weight of HNO3= 1+14+3X16=633Cu + 8HNO3 → 3Cu(NO3)2 + 4H2O + 2NO3X63.5g =190.5g 8X63g=189g 2X22400ml=44800ml189g HNO3will react with 190.5g Cu 1g HNO3will react with (190.5/189) g Cu 63g HNO3will react with (190.5/189)X63 g Cu = 63.5g CuSo amount of copper needed is 63.5g.When 189g = 8mole HNO3will react to produce 2mole NO = 44800ml NO at STPWhen 189g HNO3react it will form 44800ml NO at STPWhen 1g HNO3react it will form 44800/189 ml NO at STPWhen 63g HNO3react it will form (44800/189)X63 ml NO at STP = 14933ml at STP = 14.933 L at STPSo at STP 14.933L NO will be collected.

The color if mixture was beige. it attract toward the mixture because it contains irons.. the gas evovles is hydrogen.. it burns with pop sound

Fe(s) + S(s) --> FeS(s)

1. The resulting compound is a dark gray to black.2. Iron will pick up the iron before the reaction, but the magnet will have no effect on the iron(II) sulfide that is produced.3. Carbon disulfide will not affect FeS.4. FeS(s) + 2HCl(aq) --> FeCl2(aq) + H2S(g).... H2S is soluble in water, and produces a slightly acidic solution..... H2S(g) --H2O--> H+ + HS-

water equivalent is mL=20*0.1=2gm

The representation ofchemical reactionby means of symbols of substances in the form of formulae is calledchemical equation. E.g. - H2+ O2⇒ H2O.

A chemical equation is the symbolic representation of a chemical reaction in the form of symbols and formulae, where in the reactant entities are given on the left- hand and the product entities on the right- hand side. ex:- H2 +O2 >>>H2o

(1) Burning a magnesium metal is a combustion, exothermic, redox reaction.

(2) Zinc is more reactive than hydrogen and it displaces hydrogen from dilute acids. Zinc reacts with dilute sulphuric acid to form zinc sulphate and hydrogen gas is evolved. This is a single displacement reaction of a non-metal by a metal.

(3) When heated, lead(II) nitrate crystals decompose to lead(II) oxide, oxygen and nitrogen dioxide. Because of this property, lead nitrate is sometimes used in pyrotechnics such as fireworks.

Thanks for raising the doubt with usBalanced equation:2PB(NO3)2=2PBO +4NO2+ O2Reaction type: decomposition

(a) A chemical equation is the symbolic representation of a chemical reaction in the form of symbols and formulae, wherein the reactant entities are given on the left-hand side and the product entities on the right-hand side.Eg: 2H₂ + O₂ -> 2H₂O

(b)

(c) 2NH₃ -> N₂ + 3H₂ C + CO₂ -> 2CO

X - EthanolY - EtheneZ - Hydrogen gas

C₂H₅OH ----in presence of hot.concentrated H₂SO₄ and heating at 443 K ----------→ CH₂ = CH₂ + H₂O

Here, sulphuric acid behaves as a dehydrating agent which removes the water from ethanol to form ethene.

Lead nitrate = Pb[NO]₂ Potassium Iodide = KI

When Lead Nitrate and Potassium Iodide are mixed we get Potassium Nitrate and an insoluble solid [ precipitate ] lead iodide.

Colour of the precipitate formed is Yellow [ Lead Iodide ]

KI + Pb[NO₃]₂ -----> KNO₃ + PbI₂ -----> UNBALANCED EQUATION

2Kl+ Pb[NO₃]₂ -----> 2KNO₃ + PbI₂----> BALANCED EQUATION

This is an example of double displacement reaction.

Also , as yellow precipitate is formed , this is also an example of precipitation reaction

X→443Kconc.H2SO4Y ( unsaturated compound)Z is hydrogen (Colourless gas)

X, Y and Z are alcohol, alkene and hydrogen respectively.

Suppose X is ethanol,it gives alkene on reacting with conc. H2SO4

C2H5OH (X)→443Kconc.H2SO4 C2H4(Y)

2C2H5OH→Na2C2H5O-Na++ H2(Z)

Role of sulphuric acid: It is used as a dehydrating agent in the above reaction.

X - Ethanol: C2H5OH / Ethyl Alcohol

Y - Ethene: (C2H4)

Z - Hydrogen: (H2)

Role of sulphuric acid:dehydrating agent

X→443Kconc.H2SO4Y ( unsaturated compound)Z is hydrogen (Colourless gas)

X, Y and Z are alcohol, alkene and hydrogen respectively.

Suppose X is ethanol,it gives alkene on reacting with conc. H2SO4

C2H5OH (X)→443Kconc.H2SO4 C2H4(Y)

2C2H5OH→Na2C2H5O-Na++ H2(Z)

Role of sulphuric acid: It is used as a dehydrating agent in the above reaction.

It happens because in sunlight potassium iodide decomposes to form potassium which is brown in colour.

in which school do you read

sec butyl bromidehas one asymmetric carbon atom, is optically active and exists in the form of two enantiomers.

But if we take butylchloride withNa, the product is n-octane and not 3,4-dimethylhexane

Heating t-butyl bromide with sodium ethoxide will give isobutylene (CH3-HC=CH-CH3)

When t-butyl bromide ((CH3)3-C-Br) is heated with sodium ethoxide (C2H5-ONa), it forms isobutylene (CH3-HC=CH-CH3).

(CH3)3-C-Br + C2H5-ONa ---> CH3-HC=CH-CH3 + C2H5OH + NaBr

In this reaction ethanol (C2H5OH) and sodium bromide (NaBr) are obtained as by products.

The central carbon is surrounded by three bulky groups apart from Br, which is a good leaving group.

Hence if Br leaves first, a stable, less sterically hindered and planar carbocation (stabilised by the +I effect of 3 -CH3 groups) is formed in the first step, which is then susceptible to attack in the second step by the incoming OH- group (from either sides), forming a tertiary alcohol. This whole process depicts SN1 mechanism:

Slow, rate determining step (CH3)3 CBr → (CH3)3 C+ + Br-

Fast step (CH3)3 C+ + OH-→ (CH3)3 COH

On treatment with alcoholic KOH, n-butyl chloride undergoes beta-elimination (dehydrohalogenation) and gives 1-Butene.

Fe2O3 + 3 H2 → 2 Fe + 3 H2O Mg + H2SO4 → MgSO4 + H2 [balanced as written]

(160 g Fe2O3) / (159.6882 g Fe2O3/mol) x (3 mol H2 / 1 mol Fe2O3) x (1 mol Mg / 1 mol H2) x (24.30506 g Mg/mol) = 73.1 g Mg