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The term vitamin was coined from the word vital +amine since the earlier identified compounds had amino groups. Later work showed that most of them didn't contain amino groups, so the letter "e" was dropped and ther term vitamin is used these days.
Vitamins are classified into two groups depending upon their solubility in water or fat. Fat soluble vitamins are soluble in fat and oils but insoluble in water. They are stored in liver and adipose (fat storing) tissues. Water-soluble vitamins are soluble in water. They must be supplied regularly in the diet as they are readily excreated in urine.
Which Vitamin is known as Pyridoxine?

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Nearly all the transition elements display typical metallic properties such as high tensile strength, ductility, malleability, high thermal and electrical conductivity and metallic lustre. The transition metals (with the exception of Zn, Cd and Hg) are very hard and have low volatility. Their melting and boiling points are high. They have high enthalpies of atomization. lons of the same charge in a given series show progressive decrease in radius with increasing atomic number. However, the variation within a series is quite small. The filling of 4f before 5d orbital results in a regular decrease in atomic radii called Lanthanoid contraction which essentially compensates for the expected increase in atomic size with increasing atomic number. The net result of the lanthanoid contraction is that the second and the third d series exhibit similar radii (e.g., Zr 160 pm, Hf 159 pm) and have very similar physical and chemical properties. There is an increase in ionisation enthalpy along each series of the transition elements from left to right. The first ionisation enthalpy, in general, increases, but the magnitude of the increase in the second and third ionisation enthalpies for the successive elements, is much higher along a series. One of the notable features of a transition elements is the great variety of oxidation states these may show in their compounds.
Atomic number of Fe, Co, Ni and Cu are 26, 27, 28 and 29 respectively. Which among them is expected to possess the highest value for the second ionization enthalpy?

Predict which of the following will be colored in its aqueous solution?

A compound is formed by 2 elements P and Q. Atoms of element Q (as anions) makes ccp and those of P (as cations) fill all tetrahedral voids and also occupy half of the octahedral voids. What is the correct formula of this compound?

At what temperature a solution containing 5.60 g of glucose per 1000 g of water would boil at 1.013 bar?
(\(K_b\) for water is 0.52 K kg \(\text{mol}^{-1}\)).

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The transition metals and their compounds are known for their catalytic activity. This activity is ascribed to their ability to adopt multiple oxidation states and to form complexes. Vanadium(V) oxide (in Contact Process), finely divided iron, and nickel (in Catalytic Hydrogenation) are some of the examples. Catalysts at a solid surface involve the formation of bonds between reactant molecules and atoms of the surface of the catalyst (first row transition metals utilise 3d and 4s electrons for bonding). This has the effect of increasing the concentration of the reactants at the catalyst surface and also weakening of the bonds in the reacting molecules (the activation energy is lowering). Also because the transition metal ions can change their oxidation states, they become more effective as catalysts. Reaction between iodide and persulphate ions takes place as follows: \(2I^- + S_2O_8^{2-} \rightarrow I_2 + 2SO_4^{2-}\)
Which of the following catalyses the above reaction?

Arrange the following in increasing order of the mass of the metal deposited when 1 amp of current is passed through their electrolytic solutions for 1 minute
(A). Al (atomic mass = 27 g/mol)
(B). Mg (atomic mass = 24 g/mol)
(C). Ag (atomic mass = 108 g/mol)
(D). Cu (atomic mass = 63.5 g/mol)
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The major product of Kolbe's reaction is used for the synthesis of a precursor substrate in the preparation of aspirin
The electrophile used in Kolbe's reaction is

Given that the function \(f(x)\) is continuous on \(R\). Match \(List - I\) with \(List - II\) .

\(List - I\)	\(List - II\)
(A) \(f(x)=\left\{\begin{array}{ll}k x^2, & x<3 \\ 3, & x \geq 3\end{array}\right.\)	(I) \(k=\frac{5}{4}\)
(B) \(f(x)=\left\{\begin{array}{ll}k x+1, & x \geq 4 \\ x+2, & x<4\end{array}\right.\)	(II) \(k=-1\)
(C) \(f(x)=\left\{\begin{array}{ll}\frac{5+x}{2}, & x \neq 0 \\ 3 k, & x=0\end{array}\right.\)	(III) \(k=\frac{1}{3}\)
(D) \(f(x)=\left\{\begin{array}{ll}x+k, & x>-2 \\ -3, & x \leq-2\end{array}\right.\)	(III) \(k=\frac{5}{8}\)

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If the matrix \(\left[\begin{array}{ll}1 & 2 \\ 3 & x\end{array}\right]\) is a singular matrix, then the value of \(x\) is :

Match List I with List - II.

List - I	List - II
(A) Elephantiasis	(I) Ascaris
(B) Ascariasis	(II) Wuchereria bancrofti
(C) Pneumonia	(III) Plasmodium vivax
(D) Malaria	(IV) Haemophilus influenzae

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The cell emf depends on:

Identify the practices followed to avoid sexually transmitted infection
A. Avoiding sex with unknown partners/multiple partners
B. Using condom during coitus
C. Periodic Abstinence
D. Insertion of copper-T in the uterus
Choose the correct answer from the option given below: