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प्रश्न
To determine the percentage of water absorbed by raisins, raisins are soaked in water for:
विकल्प
30 seconds
10 minutes
2 to 3 hours
24 hours
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उत्तर
2 to 3 hours
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संबंधित प्रश्न
State whether the following statement is true or false:
A chemical equation can be balanced easily by altering the formula of a reactant or product.
The chemical reaction between quicklime and water is characterised by:
(a) evolution of hydrogen gas
(b) formation of slaked lime precipitate
(c) change in temperature of mixture
(d) change in colour of the product
A metal X forms a salt XSO4. The salt XSO4 forms a clear solution in water which reacts with sodium hydroxide solution to form a blue precipitate Y. Metal X is used in making electric wire and alloys like brass.
(a) What do you think metal X could be?
(b) Write the name, formula and colour of salt XSO4.
(c) What is the blue precipitate Y?
(d) Write a chemical equation of the reaction which takes place when salt XSO4 reacts with sodium hydroxide solution. Give the state symbols of all the reactants and products which occur in the above equation.
Balance the following equation. Also name the product formed.
`"Zn" + "HCI" → "ZnCI" _2 + "H"_2`
Balance the following equation:
\[\ce{S + HNO3 -> H2SO4 + NO2 + H2O}\]
Balance the following equation:
MnO2 + HCl → MnCl2 + H2O + Cl2
Write the balanced chemical equation of the following reaction.
potassium dichromate + hydrochloric acid → Potassium chloride + chromium chloride + water + chlorine
Choose the correct alternative and rewrite the following sentence.
Which of the following is not required to find the pH of a given solution?
Balance the following simple equation:
Ca + H2O → Ca(OH)2 + H2
What is a reactant in a chemical equation?
