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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. They are very essential for the body. They has to be taken various diet or in the form of medicines also.
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. These must be supplied regularly in diet because they are readily excreted in urine and cannot be stored in our body.
Deficiency of which vitamin causes Rickets?

If time taken for a first order reaction to get \(90\%\) complete is \(24\ min\), its \(t_{99.9\%}\) will be:

Match List - I with List - II

List - I (Order of reaction)	List - II (Unit)
(A). Zero order reaction	(I). \(L ^2 mol^{-2} s^{-1}\)
(B). First order reaction	(II). \(mol ^{-1} L s ^{-1}\)
(C). Second order reaction	(III). \(mol L ^{-1} s^{-1}\)
(D). Third order reaction	(IV). \(s ^{-1}\)

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Mischmetall consists of a lanthanoid metal (95\(\%\)) and Iron (~5\(\%\)) and traces of S, C, Ca \(\&\) Al. Mischmetall used for producing bullets contains:

A 0.5 M aqueous \(\mathrm{H}_2 \mathrm{SO}_4\) solution is diluted from 2 litres to 20 litres. The concentration of the resulting solution will be

The molecular formula of dodecacarbonyltrimanganese \((0)\) is:

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Carbohydrates such as cane sugar, glucose, starch etc. belong to a class of naturally occurring organic compounds. Structurally these are polyhydroxy aldehydes or ketones or the compounds which produce such units on hydrolysis. Carbohydrates which are sweet in taste are called sugars. Theses sugars can be reducing or non-reducing. Monosaccharides cannot be hydrolyzed to simpler units whereas Oligosaccharides yield two to ten monosaccharide units on hydrolysis. Polysaccharides yield large number of monosaccharide units on hydrolysis. This class of biomolecules is essential for living systems as they serve as storage molecules in plants and animals. In addition, they provide raw materials for important industries like furniture, textiles, paper, lacquers and breweries. Two aldopentose form important constituents of nucleic acids. Carbohydrates are also called saccharides (Greek: sakcharon which means sugar). Sugar which is used in household and in milk also comes under this class of biomolecules.
Reducing sugars respond to

Match List-I with List-II

List-I (Reaction)	List-II (Type of reaction)
(A) Hydrolysis of Ethyl Chloride	(I) Substitution reaction
(B) 2-Propanol is treated with Conc. Sulphuric acid	(II) Addition reaction
(C) Reaction of HCN with Acetone	(III) Degradation reaction
(D) Treatment of acetamide with NaOH and Br2	(IV) Elimination reaction

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The digit in the unit's place of \(6^{500}\) is:

In a double slit experiment, if the distance between the slits be reduced to half, then the new fringe width will be

A solenoid with an iron core and a bulb are connected to an a.c. source. The bulb is glowing with certain brightness. When the iron core is removed from the solenoid, the brightness of the bulb

Which of the following statements are correct?
(A) The resistance of a conductor and its resistivity both depend on temperature.
(B) For a conductor of 1 m length and of \( 1 \text{ m}^2 \) cross-sectional area, the resistance is equal to its resistivity
(C) Resistance and resistivity both depend on cross-sectional area
(D) The resistivity of two wires made of same material but of different dimensions is the same.
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Match the complexes given in List-I with the number of unpaired electrons given in List-II

List-I (Complexes)	List-II (No. Of unpaired electrons.)
(A) \(\left[ Ti \left( H _2 O \right)_6\right]^{3+}\)	(I) 1
(B) \(\left[ NiF _6\right]^{4-}\)	(II) 5
(C) \(\left[ Fe ( CN )_6\right]^{4-}\)	(III) 2
(D) \(\left[ MnF _6\right]^{4-}\)	(IV) 0

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