Advertisements
Advertisements
प्रश्न
Which among the following statement(s) is(are) true? ‘Exposure of silver chloride to sunlight for a long duration turns grey due to
- The formation of silver by the decomposition of silver chloride.
- sublimation of silver chloride.
- decomposition of chlorine gas from silver chloride.
- oxidation of silver chloride.
पर्याय
(i) only
(i) and (iii)
(ii) and (iii)
(iv) only
Advertisements
उत्तर
(i) only
Explanation -
Silver chloride is sensitive to sun light and decomposes slowly to give silver which is grey in colour and chlorine.
`2"AgCl" overset("Sun light")(->)underset(("Grey"))(2"Ag") + "Cl"_2`
APPEARS IN
संबंधित प्रश्न
Fill in the following blank with suitable word:
Chemical equations are balanced to satisfy the law of ............
Write a balanced chemical equation for the process of photosynthesis giving the physical states of all the substances involved and the conditions of the reaction.
State one characteristic of the chemical reaction which takes place when quicklime is treated with water
You are given the solution of lead nitrate. In order to obtain a yellow precipitate you should mix with it a solution of:
(a) potassium chloride
(b) potassium nitride
(c) potassium sulphide
(d) potassium iodide
The metal M reacts vigorously with water to form a solution S and a gas G. The solution S turns red litmus to blue whereas gas G, which is lighter than air, burns with a pop sound. Metal M has a low melting point and it is used as a coolant in nuclear reactors.
(a) What is metal M?
(b) What is solution S? Is it acidic or alkaline?
(c) What is gas G?
(d) Write a balanced chemical equation for the reaction which takes place when metal M reacts with water.
(e) Is this reaction exothermic or endothermic?
Write balanced chemical equation with state symbols for the following reaction:
Barium chloride solution reacts with sodium sulphate solution to give insoluble barium sulphate and a solution of sodium chloride.
Explain the following reaction with one suitable example .
Decomposition reaction
Write word equation for the following skeletal equation:
\[\ce{FeCl2 + Cl2 -> FeCl3}\]
Balance the following equation Also name the product formed.
`"K" + "CI"_2 → "KCI"`
Balance the following equation. Also name the products formed.
\[\ce{Ag + S -> Ag2S}\]
While performing the experiment with raisins to determine the percentage of water absorbed by them, a student made following measurements:
Mass of water in the beaker = 40 g
Mass of raisins before soaking = 5 g
Mass of raisins after soaking for 2 hours = 8 g
Mass of water left in the beaker after the experiment = 35 g
The percentage of water absorbed by raisins is:
A student weighed some raisins and recorded the weight as ‘x’. She then soaked the raisins in distilled water. After about 2 hours she removed the raisins, wiped them dry and weighed them again, and recorded that as ‘y’. The percentage of water absorbed by raisins may be determined using the relationship.
Identify the type of reaction taking place of the following case and write the balanced chemical equation of the reaction:
Potassium iodide reacts with lead nitrate to produce potassium nitrate and lead iodide.
Representation of the results of a chemical change – is a chemical equation.
For the equation: FeCl3 + 3NH4OH 3NH4Cl + Fe(OH)3 ↓
Answer the following:
What is the indications of the arrow between the reactants and the products and of the arrow pointing downwards at the end.
Name the following:
The silvery residue obtained on heating mercury [II] oxide.
Balance the following simple equation:
Zn + HCl → ZnCl2 + H2
Balance the following simple equation:
Fe2O3 + CO → Fe + CO2
Underline the compound in the equation given below, it is incorrectly balanced and write the correct balancing for the same.
6NaOH + 3Cl2 → 6NaCl + NaClO3 + 3H2O
What is a reactant in a chemical equation?
