All samples of carbon dioxide contain carbon and oxygen in the mass ratio 3 : 8. This is in agreement with the law of
(A) conservation of mass
(B) constant proportions
(C) (A) and (B) both
(D) none of these
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Which of the following gases can be used for storage of fresh sample of an oil for a long time? (A) Carbon dioxide or oxygen (B) Nitrogen or oxygen
(D) Helium or nitrogen To prevent rancidification of foods containing fats and oils, the packed food is surrounded by unreactive gas (like helium, nitrogen, etc.). The inert atmosphere thus created prevents...
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Carbon exists in the atmosphere in the form of (A) carbon monoxide only (B) carbon monoxide in traces and carbon dioxide
(C) carbon dioxide only
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The terms 'Agreement on Agriculture', 'Agreement on the Application of Sanitary and Phytosanitary Measures'
(c) 'Agreement on Agriculture', 'Agreement on the Application of Sanitary and Phytosanitary Measures' and 'Peace Clause' are related to World Trade Organisation.
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Calculate the weight of carbon monoxide having same number of oxygen atoms as are present in 88 g of carbon dioxide.
Molecular mass of CO2 = 12 + 2 x 16 = 44 1mol of CO2 = 44 g 44 g of CO2 contain = 6.022 x 1023 molecules 88 g of CO2 contain...
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Acid rain is caused by the pollution of environment by (a) carbon dioxide and nitrogen (b) carbon monoxide and carbon dioxide
(d) Acid rain is caused by a chemical reaction that begins when compounds of sulphur dioxide and nitrogen oxide react with molecules in the atmosphere to produce acids.
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An organic compound contain 69% carbon and 4.8% hydrogen, the remaining being oxygen. Calculate the masses of carbon dioxide
Calculation of mass of CO2 produced: Mass of compound =0.20g %C =12 x C 69=12*mass of CO2 formed*100/44*0.2 Mass of CO2 formed =69*44*.2/12*100 = 0.506g Similarly, % H =2* mass of H2O formed*100/18*mass of compoun 4.8=2* mass...
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Carbon burns in oxygen to form carbon dioxide. The properties of carbon dioxide are -
(C) totally different from both carbon and oxygen
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The terms ‘Agreement on Agriculture’, ‘Agreement on the Application of Sanitary and Phytosanitary
(c) ‘Agreement on Agriculture’, ‘Agreement on the Application of Sanitary and Phytosanitary Measures’ and ‘Peace Clause’ are related to World Trade Organisation.
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(i) Solution of a substance 'X' is used for testing carbon dioxide. Write the equation of the reaction of 'X' with carbon dioxide.
(i) Substance X- Calcium Hydroxide. Ca(OH)2(aq) + CO2(g) → CaCO3(s) H2O (ii) Calcium hydroxide is obtained by reaction of calcium oxide and water. CaO(s) + H2O(l) → Ca(OH)2(aq) + Heat
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A solution of a substance 'X' is used for testing carbon dioxide. Write the equation of the reaction of 'X' with carbon dioxide.
(i) Substance X is lime water. Ca(OH)2 + CO2 → CaCO3 + H2O Ca(OH)2 -(Lime water) CO2 -(Carbon dioxide) CaCO3 -(Calcium carbonate) H2O - (Water) (ii) Calcium oxide reacts vigorously with water to produce slaked lime (calcium hydroxide) releasing a large amount of...
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