Arrange the following nucleophiles in the decreasing order of their attacking strength :
(A) \(C _6 H _5 COO ^{-}\)
(B) \(CH _3 CH _2 CH _2 COO ^{-}\)
(C) \(CH _3 CH _2 CH _2 CH _2 S^{-}\)
(D) \(CH _3 CH _2 CH _2 CH _2 O ^{-}\)
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Glucose gets oxidised to gluconic acid on reaction with bromine water. This indicates the presence of :

Match List-I (vitamin) with List-II (deficiency disease)

List-l (Vitamin)	List-II (Deficiency disease)
(A) Thiamine	(I) Convulsions
(B) Pyridoxine	(II) Cheilosis
(C) Vitamin E	(III) Retarded Growth
(D) Riboflavin	(IV) Muscular weakness

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Arrange the following transition metal ions based on decreasing number of unpaired electrons.
A. \(Fe ^{2+}\)
B. \(Mn ^{2+}\)
C. \(Co ^{2+}\)
D. \(Sc ^{3+}\)
E. \(Cu ^{2+}\)
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A reaction is second order with respect to a reactant. If the concentration of the reactant is increased by 1.5 times, the
rate of the reaction

Read the passage carefully and answer the questions
The chemical reactions proceed at different rates which depend on various factors like concentration, temperature, etc. Rate law is an expression which relates the rate of reaction with concentration of various reacting species in the reaction. For a first order reaction, the concentration of the reactant after time \(t\) is related with its initial concentration by the relation, \(C=C_0 e^{-k t}\). The rate constants for different orders have different expressions. For a first order reaction, \(k=\frac{2.303}{t} \log \frac{a}{a-x}\), where \(a\) is the initial concentration and \(x\) is the extent of reaction.
A first order reaction is one-fifth completed in 40 minutes. Calculate the time required for its 100 % completion

Osmotic pressure measurements are less accurate and difficult to carry out. Therefore, this method is not useful for measuring molecular weights. But it is used to find out molecular weights of polymers eg. plastics, proteins and starch having many monomer units. Knowing the value of osmotic pressure of a given solution, molecular weight of the solute can be calculated using Van't Hoff equation.
An aqueous solution of salt contains 20 g of NaCl per liter. The pressure of solution at 35 \(^{\circ}\text{C}\) will be:

Given below are some stages of human evolution. Arrange them in correct sequence (Past to Recent)
(A) Homo habilis
(B) Homo sapiens
(C) Homo neanderthalensis
(D) Homo erectus
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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.
In Recombinant DNA Technology, what is the role of the "selectable marker gene"?

If \(P(A) = \frac{3}{10}, P(B) = \frac{2}{5}\) and \(P(A \cup B) = \frac{3}{5}\), then \(P(B|A) + P(A|B)\) is equal to:

The area (in square units) of the region bounded by the curves \(3 y^2=a x, y=a, a>0\) and \(y\) - axis is :

If \(p\) is the probability of any event \(A\) then which one of the following statement is true?

Observe the figure and answer the following questions

Match List I with List II

LIST I (Name of the structure)	LIST II (LABEL)
A. Graafian Follicle	I. B
B. Primary Follicle	II. D
C. Corpus Luteum	III. A
D. Ovum	IV. E

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