With reference to D-glucose, which of the following
cannot be explained by its open chain structure?
(A) D-Glucose does not give Schiff's test.
(B) The pentaacetate of D-glucose does not react with hydroxylamine.
(C) Glucose is found to exist in two different crystalline forms.
(D) D-glucose reacts with mild oxidizing agents like \(\text{Br}_2\text{-H}_2\text{O}\)
and forms gluconic acid.
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Vitamins represent a group of organic compounds which are needed in small amount for the healthy growth and maintenance of our body. These are not synthesized by the body and are supplied in the diet. The deficiency of vitamins can be supplemented with medicines. The deficiency disease associated with Vitamin K is:

45 g of ethylene glycol (C₂H₆O₂) is mixed with 600 g of water. Calculate the depression in freezing point.
(K_f for water = 1.86 K kg mol^-1)

The synthesis of alkyl fluoride is best accomplished by the following reaction:
\(CH_3Br + AgF\rightarrow CH_3F + AgBr\)
The reaction is termed as:

The least reactive aldehyde towards HCN would be :

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P block elements are placed in groups 13 to 18 of the periodic table. Their valence shell electronic configuration is \(ns^2 np^{1-6}\). Group 16 of the p block elements are known as the group of chalcogens having \(ns^2 np^4\) as their general electronic configuration. They exhibit number of oxidation states but the stability of \(- 2\) oxidation state decreases down the group. They are sometimes also known as group of chalcogens as the name is derived from the Greek word for brass and points to the association of sulphur and its congeners with copper. Their ionisation enthalpy decreases down the group. Oxygen shows anomalous behaviour due to its small size and high electronegativity.
Match the oxidation state of phosphorous in the following compounds to their counter parts in List II.

List - I (Compounds)	List - II (Oxidation States)
(A) \(H _3 PO _2\)(Hypophosphorous acid)	(I) +3
(B)\(H _4 P _2 O _6\)(Hypophosphoric acid)	(II) +5
(C) \(H _3 PO _3\)(Phosphorous acid)	(III) +1
(D)\(H _3 PO _4\)(Orthophosphoric acid)	(IV) +4

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The product obtained from catalytic reduction of propanal is:

If A is a square matrix such that \(A^2=A\), then \(|A|\) equals :

A \( 25 \, \mu\text{F} \) capacitor, a 0.10 H inductor and a \( 25 \, \Omega \) resistor are connected in series with an ac source of emf \( \epsilon = 310 \sin 314t \). What is the frequency of AC source ?

If a p-n junction is forward biased, then what is the direction of diffusion and drift current across the junction?

Hardy - Weinberg principle states that:

Two point charges of 1 C each are separated from each other by a distance of 1 m in vacuum.
The force of interaction between them is:

Match list-I with list-II

List-I	List-II
(A) Rays used in satellite communication	(I) X rays
(B) Rays produced in nuclear reaction	(II) Gamma rays
(C) Radiation used for studying crystal structure	(III) Ultraviolet rays
(D) Radiation absorbed by ozone layer	(IV) microwave

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