1. White wash was being done at Mukesh’s house. Mukesh saw that the painter added quick lime to drum having water. Mukesh touched outer surface of drum, it was unbelievably hot. Mukesh observed that the painter added quick lime (calcium oxide, CaO) to water, resulting in an exothermic reaction. (a) Write the chemical equation for […]
LONG ANSWER TYPE OF QUESTIONS (5 MARKS) Class 10 Supports Answers Read More »
Types of Reactions and Balanced Chemical Equations: (a) Zinc Reacts with Silver Nitrate: (b) Potassium Iodide Reacts with Lead Nitrate: Other Related Questions For Practicing Before the Exam
When 2 grams of silver chloride (AgCl) is taken in a china dish and placed in sunlight for some time, the following observations and reactions occur: Silver chloride is sensitive to light. When exposed to sunlight, the energy from the light causes silver chloride to break down into silver metal and chlorine gas. This process
Decomposition reactions require energy either in the form of heat, light, or electricity for breaking down the reactants. Here are examples for each type: Other Related Questions For Practicing Before the Exam
(i) State the color of the precipitate: (ii) Name the compound which is precipitated: (iii) Write the balanced equation for the chemical reaction: Pb(NO3)2+2KI→PbI2+2KNO3 Conclude: Other Related Questions For Practicing Before the Exam
(a) What could be metal ‘X’ and ‘Y’? (b) Name the metal salt YSO₄: (c) What type of chemical reaction takes place between X and YSO₄? Write the balanced chemical equation: Zn(s) + CuSO₄(aq) → ZnSO₄(aq) + Cu(s) Other Related Questions For Practicing Before the Exam
(a) Identify the metal M and gas X₂: (b) Identify MX: (c) Write down the chemical reaction when salt MX is exposed to sunlight: 2AgCl→2Ag+Cl2 Other Related Questions For Practicing Before the Exam
(a) Name the compounds ‘X’ and ‘Y’: (b) Write the chemical equation for this reaction: CaCO3 → CaO+ CO2 Other Related Questions For Practicing Before the Exam
(a) White silver chloride turns grey in sunlight: (b) Brown-colored copper powder turns black when heated in the air: Other Related Questions For Practicing Before the Exam
Give reasons: (a) White silver chloride turns grey in sunlight Read More »
(a) Oxidized substance: Hydrogen (H₂)(b) Reduced substance: Copper oxide (CuO)(c) Oxidizing agent: Copper oxide (CuO) Other Related Questions For Practicing Before the Exam
In the reaction: CuO(s) + H2(g) → Cu(s) + H2O (g) Read More »
(a) Name the gas collected at cathode and anode respectively. (b) Why is volume of one gas collected at one electrode is double of another? (c) Why is it necessary to add few drops of dil. H2SO4 to water before electrolysis? Other Related Questions For Practicing Before the Exam
In electrolysis of water: Name the gas collected at cathode and anode Read More »
A redox reaction, short for reduction-oxidation reaction, is a chemical reaction in which the oxidation states of atoms are changed. This involves the transfer of electrons between substances: one substance loses electrons (oxidation) and another gains electrons (reduction). Here’s an example of a redox reaction: Zn(s) + Cu²⁺(aq) + SO₄²⁻(aq) → Zn²⁺(aq) + SO₄²⁻(aq) +
What is a redox reaction? Write down a chemical reaction representing it. Read More »
