Statement I : Dipole moment is a vector quantity and by convention it is depicted by a small arrow with tail on the negative centre and head pointing towards the positive centre. Statement II : The crossed arrow of the dipole moment symbolizes the direction of the shift of charges in the molecules. In the light of the above statements, choose the most appropriate answer from the options given below :

What is the number of unpaired electron(s) in the highest occupied molecular orbital of the following species : $${\mathrm{N}}_2;{\mathrm{N}}_2^{+};{\mathrm{O}}_2;{\mathrm{O}}_2^{+}$$ ?

Decreasing order of the hydrogen bonding in following forms of water is correctly represented by A. Liquid water B. Ice C. Impure water Choose the correct answer from the options given below :

Order of Covalent bond; $$A.\mathrm{KF}>\mathrm{KI};\mathrm{LiF}>\mathrm{KF}$$ $$B.\mathrm{KFKF}$$ $$C.\mathrm{SnC}{\mathrm{l}}_4>\mathrm{SnC}{\mathrm{l}}_2;\mathrm{CuCl}>\mathrm{NaCl}$$ \mathrm{D.~LiF > KF ; CuCl\mathrm{E.~KF NaCl}$$ Choose the correct answer from the options given below :

The number of $\mathrm{P}-\mathrm{O}-\mathrm{P}$ bonds in ${\mathrm{H}}_4{\mathrm{P}}_2{\mathrm{O}}_7,{\left({\mathrm{HPO}}_3\right)}_3$ and ${\mathrm{P}}_4{\mathrm{O}}_{10}$ are respectively :

Consider the following statements: (A) NF3 molecule has a trigonal planar structure. (B) Bond length of ${\mathrm{N}}_2$ is shorter than ${\mathrm{O}}_2$. (C) Isoelectronic molecules or ions have identical bond order. (D) Dipole moment of ${\mathrm{H}}_2\mathrm{S}$ is higher than that of water molecule. Choose the correct answer from the options given below:

Given below are two statements : Statement I : $${\mathrm{SO}}_2$$ and $${\mathrm{H}}_2\mathrm{O}$$ both possess V-shaped structure. Statement II : The bond angle of $${\mathrm{SO}}_2$$ is less than that of $${\mathrm{H}}_2\mathrm{O}$$. In the light of the above statements, choose the most appropriate answer from the options given below:

In which of the following processes, the bond order increases and paramagnetic character changes to diamagnetic one ?

$${\mathrm{ClF}}_5$$ at room temperature is a:

The bond order and magnetic property of acetylide ion are same as that of

Match List - I with List - II: .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px; overflow:hidden;padding:10px 5px;word-break:normal;} .tg th{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px; font-weight:normal;overflow:hidden;padding:10px 5px;word-break:normal;} .tg .tg-baqh{text-align:center;vertical-align:top} .tg .tg-amwm{font-weight:bold;text-align:center;vertical-align:top} List - I Species List - II Geometry/Shape A. $${\mathrm{H}}_3{\mathrm{O}}^{+}$$ I. Tetrahedral B. Acetylide anion II. Linear C. $$\mathrm{N}{\mathrm{H}}_4^{+}$$ III. Pyramidal D. $$\mathrm{Cl}{\mathrm{O}}_2^{-}$$ IV. Bent Choose the correct answer from the options given below:

The compound which does not exist is

Match List I with List II .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px; overflow:hidden;padding:10px 5px;word-break:normal;} .tg th{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px; font-weight:normal;overflow:hidden;padding:10px 5px;word-break:normal;} .tg .tg-c3ow{border-color:inherit;text-align:center;vertical-align:top} .tg .tg-7btt{border-color:inherit;font-weight:bold;text-align:center;vertical-align:top} .tg .tg-0pky{border-color:inherit;text-align:left;vertical-align:top} LIST I Oxide LIST II Type of bond A. $${\mathrm{N}}_2{\mathrm{O}}_4$$ I. 1 N = O bond B. $$\mathrm{N}{\mathrm{O}}_2$$ II. 1 N $$-$$ O $$-$$ N bond C. $${\mathrm{N}}_2{\mathrm{O}}_5$$ III. 1 N $$-$$ N bond D. $${\mathrm{N}}_2\mathrm{O}$$ IV. 1 N=N / N $$\equiv$$ N bond Choose the correct answer from the options given below:

All structures given below are of vitamin C. Most stable of them is :

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : $$\alpha$$-halocarboxylic acid on reaction with dil. $$\mathrm{N}{\mathrm{H}}_3$$ gives good yield of $$\alpha$$-amino carboxylic acid whereas the yield of amines is very low when prepared from alkyl halides. Reason (R) : Amino acids exist in zwitter ion form in aqueous medium. In the light of the above statements, choose the correct answer from the options given below :

The correct representation in six membered pyranose form for the following sugar [X] is

Match List I with List II .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px; overflow:hidden;padding:10px 5px;word-break:normal;} .tg th{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px; font-weight:normal;overflow:hidden;padding:10px 5px;word-break:normal;} .tg .tg-7btt{border-color:inherit;font-weight:bold;text-align:center;vertical-align:top} .tg .tg-amwm{font-weight:bold;text-align:center;vertical-align:top} .tg .tg-0pky{border-color:inherit;text-align:left;vertical-align:top} List I List II Test Functional group / Class of Compound A. Molisch's Test I. Peptide B. Biuret Test II. Carbohydrate C. Carbylamine Test III. Primary amine D. Schiff's Test IV. Aldehyde Choose the correct answer from the options given below :

A protein '$$\mathrm{X}$$' with molecular weight of $$70,000\mathrm{u}$$, on hydrolysis gives amino acids. One of these amino acid is

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Ketoses give Seliwanoff's test faster than Aldoses. Reason (R) : Ketoses undergo $$\beta$$-elimination followed by formation of furfural. In the light of the above statements, choose the correct answer from the options given below :

Following tetrapeptide can be represented as (F, L, D, Y, I, Q, P are one letter codes for amino acids)