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प्रश्न
Write the observation for the following:
Moist starch iodide paper is put on the mouth of a test tube containing chlorine gas.
उत्तर
Chlorine gas turns moist starch iodide paper black.
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संबंधित प्रश्न
Differentiate between 2H and H2
If the hydrogen sample contains N molecules, how many molecules are present in oxygen sample?
Samples of the gases O2, N2, CO2 and CO under the same conditions of temperature and pressure contain the same number of molecules represented by X. The molecules of Oxygen, occupy V litres and have a mass of 8 g. Under the same conditions of temperature and pressure :
What is the volume occupied by : 3X molecules of CO? [C=12,N=14,O=16]
The reaction between 15 g of marble and nitric acid is given by the following equation:
\[\ce{CaCO3 + 2HNO3 -> Ca(NO3)2 + H2O + CO2}\]
Calculate the mass of anhydrous calcium nitrate formed.
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\[\ce{KNO3 + H2SO4 -> KHSO4 + HNO3}\]
\[\ce{NaNO3 + H2SO4 -> NaHSO4 + HNO3}\]
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\[\ce{2Na2O2 + 2H2O -> 4NaOH + O2}\]
Calculate the mass of sodium hydroxide formed.
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\[\ce{Al4C3 + 12H2O -> 3CH4 + 4Al(OH)3}\]
What mass of aluminium hydroxide is formed from 12g of aluminium carbide?
What volume of oxygen is required to burn completely a mixture of 22.4 dm3 of methane and 11.2 dm3 of hydrogen into carbon dioxide and steam?
\[\ce{CH4 + 2O2 -> CO2 + 2H2O}\]
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What will be the volume of ammonia when measured at STP?
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\[\ce{P + 5HNO3 -> H3PO4 + 5NO2 + H2O}\]
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