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Identify the substance oxidised, substance reduced, oxidising agent and reducing agent:
Substance oxidised :HCI Substance reduced :MnO2 Oxidising agent :MnO2 Reducing agent :HCI
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Identify the substance that is oxidised and substance that is reduced in the reaction. CuO(s) + H2(g) → Cu(s) + H2O(l)
It is a combination reaction.
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Identify the type of reaction from the following equations: i. CH4 + 2O2 → CO2 + 2H2O
i. Combustion and redox reaction ii. Double displacement and precipitation reaction iii. Combination reaction iv. Displacement reaction
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Although both CO2 and H2O are triatomic molecules, the shape of H2O molecule is bent while that of CO2 is linear.
CO2 molecule has only two bonds which lie farthest to each other to minimise repulsion, making an angle of 180°. H2O, on the other hand, has a lone pair. As lone...
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Why is acetic acid & not nitric acid is used to acidify soda extract for testing of sulphur by lead acetate test?
Lead acetate on reacting with sulphuric acid will give a white ppt of lead sulphate which interferes in the detection of sulphur. (CH3COO )2Pb + H2SO4 ----------> PbSO4 + 2CH3COOH
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Why freshly prepared FeSO4 is used in nitrogen testing?
Because FeSO4 gets hydrolysed if its solution is stored for long.
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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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A substance which reacts with oxygen giving heat is called a combustible substance. Which, one of the following is a combustible substance?
The Right option is : (d) wood
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A gaseous mixture of H2 and CO2 gas contains 66mass% of co2 .The vapour density of the mixture is
A gaseous mixture of H₂ and CO₂ contain 66 % CO₂ by mass of CO₂ this means if mixture 100g CO₂ =66g and H₂ =34g Applying Dalton's law : m mix = mH₂...
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