An organic compound with 51.6% sulfur is heated in a Carius tube. The amount of this compound which will form 0.752 g of barium sulphate is ___________ $\times$ 10^$-$1 g.

(Given molar mass of barium sulphate 233 g mol^$-$1) (Nearest integer).

0.25 g of an organic compound containing chlorine gave 0.40 g of silver chloride in Carius estimation. The percentage of chlorine present in the compound is ___________. [in nearest integer]

(Given : Molar mass of Ag is 108 g mol^$-$1 and that of Cl is 35.5 g mol^$-$1)

In the estimation of bromine, 0.5 g of an organic compound gave 0.40 g of silver bromide. The percentage of bromine in the given compound is _________ % (nearest integer)

(Relative atomic masses of Ag and Br are 108u and 80u, respectively).

1 mole of $\mathrm{PbS}$ is oxidised by "$\mathrm{X}$" moles of $\mathrm{O}_3$ to get "" moles of . _________.

If IUPAC name of an element is "Unununnium" then the element belongs to n^th group of Periodic table. The value of n is ________.

On a thin layer chromatographic plate, an organic compound moved by $3.5 \mathrm{~cm}$, while the solvent moved by $5 \mathrm{~cm}$. The retardation factor of the organic compound is ________ $\times 10^{-1}$.

Total number of acidic oxides among

$\mathrm{N_2O_3,NO_2,N_2O,Cl_2O_7,SO_2,CO,CaO,Na_2O}$ and is ____________.

In the following reactions, the total number of oxygen atoms in X and Y is ___________.

Na$_2$O + H$_2$O 2X

Number of oxygen atoms present in chemical formula of fuming sulphuric acid is ___________.

From the given list, the number of compounds with +4 oxidation state of Sulphur ________.

$\mathrm{SO}_3, \mathrm{H}_2 \mathrm{SO}_3, \mathrm{SOCl}_2, \mathrm{SF}_4, \mathrm{BaSO}_4, \mathrm{H}_2 \mathrm{S}_2 \mathrm{O}_7$

In a solid AB, A atoms are in ccp arrangement and B atoms occupy all the octahedral sites. If two atoms from the opposite faces are removed, then the resultant stoichiometry of the compound is A_xB_y. The value of x is ____________. [nearest integer]

The neutralization occurs when 10 mL of 0.1M acid 'A' is allowed to react with 30 mL of 0.05 M base M(OH)₂. The basicity of the acid 'A' is __________.

[M is a metal]

The oxidation number of iron in the compound formed during brown ring test for NO$_3^-$ iron is ________.

An element M crystallises in a body centred cubic unit cell with a cell edge of $300 \,\mathrm{pm}$. The density of the element is $6.0 \mathrm{~g} \mathrm{~cm}^{-3}$. The number of atoms present in of the element is ____________ . (Nearest integer)

While estimating the nitrogen present in an organic compound by Kjeldahl's method, the ammonia evolved from $0.25 \mathrm{~g}$ of the compound neutralized $2.5 \mathrm{~mL}$ of $2 \,\mathrm{M} \,\mathrm{H}_{2} \mathrm{SO}_{4}$. The percentage of nitrogen present in organic compound is ______________.

A 2.0 g sample containing MnO₂ is treated with HCl liberating Cl₂. The Cl₂ gas is passed into a solution of KI and 60.0 mL of 0.1 M Na₂S₂O₃ is required to titrate the liberated iodine. The percentage of MnO₂ in the sample is _____________. (Nearest integer)

[Atomic masses (in u) Mn = 55; Cl = 35.5; O = 16, I = 127, Na = 23, K = 39, S = 32]