Laws of Chemical Combinations

Which of the following shaped tube is used in Landolt's experiment.

Landolt's experiment verifies the law of constant compositions.

Landolt's experiment verifies

What is the law on which Landolt's experiment is based.

What is Landolt's experiment.

When $10 \mathrm{mL}$ of propane (gas) is combusted completely, the volume of ${\mathrm{CO}}_2\left(\mathrm{g}\right)$ obtained in similar condition is:

${\mathrm{H}}_2\mathrm{S}$ contains $94.11\%$ sulphur; ${\mathrm{SO}}_2$ contains 50% oxygen and ${\mathrm{H}}_2\mathrm{O}$ contains $11.11\%$ hydrogen. Thus, 

Two substances $\mathrm{I}$ and $\mathrm{II}$ of carbon and oxygen have respectively $72.73\%$ and $47.06\%$ oxygen. Hence, they follow:

'The matter can neither be created nor destroyed but one form of matter can be converted into other' the said law is _____ law of thermodynamics.(first/second)

An electric discharge is passed through a mixture containing $50 \mathrm{ml}$ of ${\mathrm{O}}_{2( \mathrm{g})}$ and $50 \mathrm{ml}$ of ${\mathrm{H}}_{2( \mathrm{g})}$. The volume of the product $\left({\mathrm{H}}_2\mathrm{O}\right)$ formed at $110°\mathrm{C}$ will be. (Identical conditions of temperature and pressure):

Potassium chloride contains $52\%$ of $\mathrm{K}$, potassium iodide contains $23.6\%$ of $\mathrm{K}$ and iodine monochloride contains $77.8\%$ of $\mathrm{I}$.  The given information illustrates which of the followin laws?

Given $3\mathrm{g}$ of carbon reacts with $1\mathrm{g}$ of hydrogen to form ${\mathrm{CH}}_4$ and $8\mathrm{g}$ of oxygen reacts with $1\mathrm{g}$ of hydrogen to form ${\mathrm{H}}_2\mathrm{O}$. Similarly, $12\mathrm{g}$ of carbon reacts with $32\mathrm{g}$ of oxygen to form carbon dioxide. In both cases the ration of carbon and oxygen is 3 : 8. Which of the following laws illustrate the given example?

Which of the following compounds verify Law of Reciprocal Proportions?

Two oxides of metal contain $36.4 \mathrm{and} 53.4$ percent of oxygen by mass respectively. If the formula of the first oxide is ${\mathrm{M}}_2\mathrm{O}$, then that of the second oxide is 

$100 \mathrm{g}$ of ethylene polymerizes to polythene according to the equation:
$\mathrm{n} {\mathrm{CH}}_2={\mathrm{CH}}_2\to {\left({\mathrm{CH}}_2-{\mathrm{CH}}_2\right)}_{\mathrm{n}}$
The mass of polythene produced will be

Two oxides of metal contain $36.4 \mathrm{and} 53.4$ percent of oxygen by mass respectively. If the formula of the first oxide is ${\mathrm{M}}_2\mathrm{O}$, then that of the second is

If $0.607 \mathrm{g}$ of silver salt of Tribasic acid was quantitatively reduced to $0.370 \mathrm{g}$ pure-Ag. Calculate molecular mass of tribasic acid

$\mathrm{R} {\mathrm{H}}_3\stackrel{{\mathrm{AgNO}}_3}{⟶}\mathrm{R} {\mathrm{Ag}}_3\stackrel{1 \mathrm{g} \mathrm{nition}}{⟶}\mathrm{Ag}$

Calculate The total no. of oxygen and Nitrogen atoms present in a mixture containing 8.2g Ca ,10 mM of NaNo₃ and No / 6 molecule  of No₂(g). Report their nearest whole number ratio

The Following data are obtained when dinitrogen and dioxygen react together to form different compounds.
 

$20.8 \mathrm{g}$ of $\mathrm{B}\mathrm{a}\mathrm{C}{\mathrm{l}}_2$ on reaction with $9.8 \mathrm{g}$ of ${\mathrm{H}}_2\mathrm{S}{\mathrm{O}}_4$ produces $7.3 \mathrm{g}$ of $\mathrm{H}\mathrm{C}\mathrm{l}$ and some amount of $\mathrm{B}\mathrm{a}\mathrm{S}{\mathrm{O}}_4$. The amount in grams of $\mathrm{B}\mathrm{a}\mathrm{S}{\mathrm{O}}_4$ formed is