The decreasing order of reducing power of the given species as per their standard reduction potentials is :
A. \(- 2.36\)
B. \(+0.54\)
C. \(+1.23\)
D. \(-0.74\)
E. \(+ 1.81\)
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The aqueous solutions of \(ZnSO _4, AgNO _3, FeCl _3\) and \(WCl _6\) are electrolysed for 2 hours using a current of 5 amperes. The decreasing order of mass deposited of the following metals at the cathode will be:
(A) Zn
(B) Ag
(C) Fe
(D) W
(Atomic masses:\(Fe =56 g mol ^{-1}, Zn =65 g mol ^{-1}\),\(\left.Ag =108 g mol ^{-1}, W=184 g mol ^{-1}\right)\)
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Four different electrolyte solutions with the concentrations given below have the same molar conductivity value of \(1.29 \times 10^{-4} \mathrm{~S} \mathrm{~m}^2 \mathrm{~mol}^{-1}\). Arrange them in increasing order of their conductivity values:
(A) 0.1 M
(B) 0.075 M
(C) 0.15 M
(D) 0.05 M
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Formic acid does not respond to

Which of the following statements with reference to a solution are correct?
(A) the molarity of the solution changes with the change in the temperature.
(B) the volume of the solution changes with the change in the temperature.
(C) the molality of the solution changes with the change in the temperature.
(D) the normality of the solution changes with the change in the temperature.
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The vapour pressure of a solution is 2985 \(\text{Nm}^{-2}\) when 5 g of a non-electrolyte is added to 100 g of water at a particular temperature.
The vapour pressure of pure water at this temperature is 3000 \(\text{Nm}^{-2}\).
The molecular mass of the solute is

Read the passage carefully and answer the given questions. Recombinant DNA Technology Asexual reproduction preserves the genetic information, while sexual reproduction permits variation. Traditional hybridization procedures used in plants and animals breeding very often lead to inclusion and multiplication of undesirable genes along with the desired genes. The techniques of genetic engineering, which include creation of recombinant DNA, use of gene cloning and gene transfer, overcome this limitation and allow us to isolate and introduce only one or a set of desirable genes without introducing genes into the target organism.
What is the purpose of using a gene promoter in recombinant DNA technology?

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Read the following paragraph and answer the given questions:
In order to link the alien DNA, the vector needs to have very few, preferably single, recognition sites for the commonly used restriction enzymes. Presence of more than one recognition site in the vector will generate several fragments, which will complicate the gene cloning. In order to link the alien DNA, the vector needs to have very few, preferably single, recognition sites for the commonly used restriction enzymes. Presence of more than one recognition sites within the vector will generate several fragments, which will complicate the gene cloning. The ligation of alien DNA is carried out at a restriction site present in one of the two antibiotic resistance genes. The recombinant plasmids will lose tetracycline resistance due to insertion of foreign DNA but can still be selected out from non-recombinant ones by plating the transformants on tetracycline containing medium.
The recombinants will grow in ampicillin containing medium but not on that containing tetracycline. But, non- recombinants will grow on the medium containing both the antibiotics. In this case, one antibiotic resistance gene helps in selecting the transformants, whereas the other antibiotic resistance gene gets 'inactivated due to insertion' of alien DNA, and helps in selection of recombinants. Origin of replication (ori) is a sequence from where replication starts and any piece of DNA when linked to this sequence can be made to replicate within the host cells. This sequence is also responsible for controlling the copy number of the linked DNA. So, if one wants to recover many copies of the target DNA it should be cloned in a vector whose origin support has high copy number.
Multiple recognition sites in vector generate several fragments, which will complicate the-

The integral \(\int e^x\left(\log x+\frac{1}{x^2}\right) d x\) equals for some arbitrary constant k

Which of the following are NOT correct regarding the equation of tangent and normal to the curve \(y=\frac{x-11}{(x-2)(x-3)}\) at the point, where it cuts the \(x\)-aris?
(A) The point of contact is \((11,0)\).
(B) The equation of tangent is \(x-72 y-11=0\).
(C) The equation of normal is \(7 2 x + y - 1 1 = 0\).
(D) The slope of the tangent at the given point of contact is \(\frac{1}{88}\).
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Which one of the following statements is incorrect about ecological pyramids?