The number of species from the following which are paramagnetic and with bond order equal to one is _________.

$\mathrm{H}_2, \mathrm{He}_2^{+}, \mathrm{O}_2^{+}, \mathrm{N}_2^{2-}, \mathrm{O}_2^{2-}, \mathrm{F}_2, \mathrm{Ne}_2^{+}, \mathrm{B}_2$

The total number of species from the following in which one unpaired electron is present, is _______.

$\mathrm{N}_2, \mathrm{O}_2, \mathrm{C}_2^{-}, \mathrm{O}_2^{-}, \mathrm{O}_2^{2-}, \mathrm{H}_2^{+}, \mathrm{CN}^{-}, \mathrm{He}_2^{+}$

Water decomposes at 2300 K

$\mathrm{H_2O(g)\to H_2(g)+\frac{1}{2}O_2(g)}$

The denticity of the ligand present in the Fehling's reagent is ___________.

A box contains 0.90 g of liquid water in equilibrium with water vapour at 27$^\circ$C. The equilibrium vapour pressure of water at 27$^\circ$C is 32.0 Torr. When the volume of the box is increased, some of the liquid water evaporates to maintain the equilibrium pressure. If all the liquid water evaporates, then the volume of the box must be __________ litre. [nearest integer]

A trisubstituted compound '$\mathrm{A}$', $\mathrm{C}_{10} \mathrm{H}_{12} \mathrm{O}_{2}$ gives neutral test positive. Treatment of compound 'A' with and gives , with hydroiodic acid gives methyl iodide and with hot conc. gives a compound . Compound 'A' also decolorises alkaline . The number of bond/s present in the compound '' is _____________.

The number of different chain isomers for C$_7$H$_{16}$ is __________.

In an ice crystal, each water molecule is hydrogen bonded to ____________ neighbouring molecules.

The spin only magnetic moment of the complex present in Fehling's reagent is __________ B.M. (Nearest integer).

Optical activity of an enantiomeric mixture is $+12.6^{\circ}$ and the specific rotation of $(+)$ isomer is . The optical purity is __________.

The separation of two coloured substances was done by paper chromatography. The distances travelled by solvent front, substance A and substance B from the base line are 3.25 cm, 2.08 cm and 1.05 cm, respectively. The ratio of R_f values of A to B is _____________.

From the vitamins $\mathrm{A}, \mathrm{B}_1, \mathrm{~B}_6, \mathrm{~B}_{12}, \mathrm{C}, \mathrm{D}, \mathrm{E}$ and , the number of vitamins that can be stored in our body is _________.

In a linear tetrapeptide (Constituted with different amino acids), (number of amino acids) $-$ (number of peptide bonds) is ________.

How many of the given compounds will give a positive Biuret test ____________ ?

Glycine, Glycylalanine, Tripeptide, Biuret