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Temperature is calculated in Kelvin which is degree C+273.Why is the the third option not corect? Q 31. Please reply. Thanks
ThanksTemperature is calculated in Kelvin which is degree C+273.
As its 298 K initially and then 323 K the volume is not doubled.
n(NaN3)=50/(23+14*3)=0.773 Use of the Data Booklet is relevant to this question.
Most modern cars are fitted with airbags. These work by decomposing sodium azide to liberate
nitrogen gas, which inflates the bag.
2NaN3 3N2 + 2Na
A typical driver’s airbag contains 50 g of sodium azide.
Calculate the volume of nitrogen this will produce at room temperature.
A 9.2 dm3 B 13.9 dm3 C 27.7 dm3 D 72.0 dm3
Nitrogen per 100g of Fertilizer is 15g
CH3CN with NaOH is Basic Hydrolysis, that's why it is possible!37 Which mixtures, on heating, produce the gas ND3?
[D = H
2
1 , an isotope of hydrogen]
1 CaO(s) and ND4Cl(s)
2 CH3CN and NaOD in D2O
3 NDH3Cl and NaOD in D2O
Why is 2 correct too? isnot this reaction catalyzed by acid only?
Even If speed increases, The energy increases but it might not be sufficient to overcome Ea! but if the molecules posses enough energy to overcome Ea, then only the rate will double,11 It is often said that the rate of a typical reaction is roughly doubled by raising the temperature by
10 °C.
What explains this observation?
A Raising the temperature by 10 °C doubles the average kinetic energy of each molecule.
B Raising the temperature by 10 °C doubles the average velocity of the molecules.
C Raising the temperature by 10 °C doubles the number of molecular collisions in a given time.
D Raising the temperature by 10 °C doubles the number of molecules having more than a
certain minimum energy.
why shouldn't e consider factors like speed? Is not it doubled when we increase temp?
cn u ans other posts plx...thnksNitrogen per 100g of Fertilizer is 15g
So How much in 14g of Fertilizer? Ans: 2.1g (Cross-multiplication)
n=m/Mr ; 2.1/14= 0.15 moles of N (Ar of N:14)
What is the Conc. of N? c:n/v ; 0.15/5= 0.03 mol dm-3 (Ans:A)
Q28: Ans: CM/J/01 2007
Q. 28, 39
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Oct/Nov/01 2007
9, 20 (which type of isomerism changes the physical properties?)
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cn u ans other posts plx...thnks
Q15: BMJ 2008 Q15, Q21 Q27!!!some1 plz explain
23. The answer for 23 is D (correct me if I'm wrong). You can see that we start off with a basic organic compound, which is ethane and the final product is basically propane (with a halogen group), so the reagent must add ANOTHER carbon group to get from 2 carbons (ethane) to 3 carbons (propane). So it can be either C or D now. The answer is D, because ONLY KCN reacts with a halogenoalkane, not HCN.
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