- Trending Categories
- Data Structure
- Operating System
- MS Excel
- C Programming
- Social Studies
- Fashion Studies
- Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
An element is placed in 2nd Group and 3rd Period of the Periodic Table, burns in presence of oxygen to form a basic oxide.
(a) Identify the element.
(b) Write the electronic configuration.
(c) Write the balanced equation when it burns in the presence of air.
(d) Write a balanced equation when this oxide is dissolved in water.
(e) Draw the electron dot structure for the formation of this oxide.
(a) The element is Magnesium.
(b) Its Electronic Configuration is - 2,8,2
(c) The balanced equation is shown below:
$2Mg + O_2 \rightarrow 2MgO$
(d) The balanced equation is shown below:
$MgO+ H_2O \rightarrow Mg(OH)_2$
(e) The electron dot structure is shown below:
- Related Articles
- (a)What is the nature of the oxide SO2? What happens when it is dissolved in water? Write the chemical equation of the reaction involved.(b)What is the nature of the oxide Na2O? What happens when it is dissolved in water? Write the chemical equation of the reaction involved.
- (a) Potassium chlorate (KClO3) on heating forms potassium chloride and oxygen. Write a balanced equation for this reaction and indicate the evolution of gas.(b) Rewrite the following information in the form of a balanced chemical equation:Magnesium burns in carbon dioxide to form magnesium oxide and carbon.
- The element Z burns in air to form an oxide. The aqueous solution of this oxide turns blue litmus to red. The element Z is most likely to be:carboncalciumironmagnesium
- An element burns in air to form an oxide. The aqueous solution of this oxide turns turmeric paper red. State whether the element is a metal or nonmetal. Name one such element.
- An element X combines with oxygen to form an oxide XO. This oxide is electrically conducting. Write the formula of the compound formed when X reacts with chlorine.XCl3XClXCl2XCl5
- An element burns in air to form an oxide. The aqueous solution of this oxide turns blue litmus paper red. State whether the element is a metal or nonmetal. Name one such element.
- What happens when an acid reacts with a metal oxide? Explain with the help of an example. Write a balanced equation for the reaction involved.
- An element X combines with oxygen to form an oxide XO. This oxide is electrically conducting.(a) How many electrons would be there in the outermost shell of the element X?(b) To which group of the periodic tables does the element X belong?(c) Write the formula of the compound formed when X reacts with chlorine
- A non-metal A which is the largest constituent of air, when heated with H2 in 1:3 ratio in the presence of a catalyst (Fe) gives a gas B. On heating with O2 it gives an oxide C. If this oxide is passed into water in the presence of air, it gives an acid D which acts as a strong oxidising agent.(a) Identify A, B, C and D(b) To which group of periodic table does this non-metal belong?
- (a) Define the following in terms of gain or loss of hydrogen with one example each:(i) oxidation (ii) reduction(b) When a magnesium ribbon is heated, it burns in air to form magnesium oxide. Write a balanced chemical equation for this reaction. Name (i) substance oxidised, and (ii) substance reduced.
- (a) What is a balanced chemical equation? Why should chemical equations be balanced?(b) Aluminium burns in chlorine to form aluminium chloride (AlCl3). Write a balanced chemical equation for this reaction. (c) Potassium metal reacts with water to give potassium hydroxide and hydrogen gas. Write a balanced chemical equation for this reaction.
- (a) Write the formula and draw the electron dot structure of carbon tetrachloride.(b) What is saponification? Write the reaction involved in this process.
- An element X has a valency of 2. Write the simplest formula for:(a) bromide of the element(b) oxide of the element
- An element X forms an oxide X2O3. In which group of Mendeleev's periodic table is this element placed?(a) group II (b) group III (c) group V (d) group VIII
- The electronic configuration of an element is 2, 8, 4. State its:(a) group and period in the Modern Periodic Table.(b) name and write its one physical property.