Magnesium ribbon on burning in air produces
(a) magnesium oxide, water and light
(b) magnesium oxide and heat
(c) magnesium oxide, heat and light
(d) magnesium oxide, water and heat

Academic Chemistry NCERT Class 8

Correct Answer: (c) magnesium oxide, heat and light

Explanation: Magnesium ribbon on burning in air produces magnesium oxide, heat and light.

Tutorialspoint

Simply Easy Learning

Updated on: 31-Jan-2023

8 Views

MagnesiumÂ reacts with _______________ to form magnesium oxide and hydroxide
What is the chemical equation of magnesium oxide?
Burning of magnesium involves the emission of light and heat. Think of two more chemical changes which are accompanied by light, sound or heat.
In thermite welding a mixture of __________ and __________ is ignited with a burning magnesium ribbon which produces molten iron metal as large amount of heat is evolved(a) iron (III) oxide and aluminium powder (b) iron (II) oxide and aluminium powder (c) iron (III) chloride and aluminium powder (d) iron (III) sulphate and aluminium powder
Write down the formulae for the following compounds :(a) Calcium oxide(b) Magnesium hydroxide
Magnesium and oxygen combine in the ratio of 3 : 2 by mass to form magnesium oxide. What mass of oxygen gas would be required to react completely with 24 g of magnesium?
Which among the following statements is incorrect for magnesium metal?(a) It burns in oxygen with a dazzling white flame.(b) It reacts with cold water to form magnesium oxide and evolves hydrogen gas.(c) It reacts with hot water to form magnesium hydroxide and evolves hydrogen gas.(d) It reacts with steam to form magnesium hydroxide and evolves hydrogen gas.
Why should a magnesium ribbon be cleaned before burning in the air?
Write the balanced chemical equations for the following reactions and identify the type of reaction in each case.(a) Thermite reaction, iron (III) oxide reacts with aluminium and gives molten iron and aluminium oxide.(b) Magnesium ribbon is burnt in an atmosphere of nitrogen gas to form solid magnesium nitride.(c) Chlorine gas is passed in an aqueous potassium iodide solution to form potassium chloride solution and solid iodine.(d) Ethanol is burnt in air to form carbon dioxide, water and releases heat.
Write the chemical formulae of the following:(a) Magnesium chloride(b) Calcium oxide(c) Copper nitrate(d) Aluminium chloride(e) Calcium carbonate.
Write down the formulae of(i) Sodium oxide(ii) Aluminium chloride(iii) Sodium sulfide(iv) Magnesium hydroxide.
What is the nature (acidic/basic) of the following oxides?(a) Magnesium oxide(b) Sulphur dioxideGiven reason for your choice.
Biological Importance of Calcium and Magnesium
A student wants to have 3.011 × 1023 atoms each of magnesium and carbon elements. For this purpose, he will have to weigh :(a) 24 g of magnesium and 6 g of carbon(b) 12 g of carbon and 24 g of magnesium(c) 20 g of magnesium and 10 g of carbon(d) 12 g of magnesium and 6 g of carbon
(a) Give the electron configuration of magnesium and chlorine.(b) Write the electron-dot structures of magnesium and chlorine atoms. (c) Describe the formation of magnesium chloride from magnesium and chlorine by the transfer of electrons. (d) What type of chemical bonds are present in the magnesium chloride formed? (e) Why do such compounds have high melting points?

Kickstart Your Career

Get certified by completing the course

Get Started

Advertisements