A reaction is carried out using aniline as a reactant as well as solvent. How will you remove unreacted aniline?
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In a first order reaction, the concentration of the reactant, decreases from 0.8M to 0.4M in 15minutes.
(a) : The concentration of the reactant decreases from 0.8M to 0.4M in 15 minutes, i.e. t1/2 = 15 minute. Therefore, the concentration of reactant will fall from 0.1M to 0.025M in two...
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A reaction is of first order in reactant A and of second order in reactant B.
According to the given reaction: Rate = k [A] [B]2 (i) When the concentration of reactant ‘B’ is increased three times the rate of reaction becomes 9 times. i.e., Rate = k [A]...
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Is there a lake, well or step well near your house or school? Visit it and find more about it. How old is it? Who got it built?
Yes, there is an old well near my house which is about 100 years old. The local people built it.
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Complete each sentence below by appropriately using any one of the following: if you want to/ if you don’t want to/ if you want him to
(i) Don’t go to the theatre if you don’t want to. (ii) He’ll post your letter if you want him to. (iii) Please use my pen if you want to. (iv) He’ll lend...
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Who is Wole Soyinka? (a) A well-known economist. (b) A well-known football player.
(d) Akinwande Oluwole "Wole" Babatunde Soyinka is a Nigerian playwright and poet. He was awarded the 1986 Nobel Prize in Literature, the first African to be honored in that category.
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Complete each sentence below by appropriately using any one of the following: if you want to/if you don’t want to/if you want him to
(i) Don't go to the theatre if you don't want to. (ii) He'll post your letter if you want him to. (iii) Please use my pen if you want to. (iv) He'll lend...
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Rate law for the reaction A + 2B → C is found to be Rate = k [A][B] Concentration of reactant ‘B’ is doubled,
(ii) doubled
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In a reaction if the concentration of reactant A is tripled, the rate of reaction becomes twenty seven times.
Three, because rate = k [A]3
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How will you seek to remove these limitations?
The above limitations can be overcome by (i) Arranging funds in advance. (ii) Effective methods of recruitment should be adopted to ensure availability of effective staff in all departments. (iii) Middle level should...
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The measurement of an unknown resistance R is to be carried out using Wheatstones bridge (see Fig. 3.25 of NCERT Book).
(b), (c) (b) Errors of measurement do depend on the accuracy with which R2 and R1can be measured. (c) If the student uses large values of R2 and R1, the currents through the arms...
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