Question

Why should a magnesium ribbon be cleaned before burning in air?
Write the balanced equation for the following chemical reactions,
QUE S
E S T I O N S
1.
2.
(1) Hydrogen + Chlorine → Hydrogen chloride
(ii) Barium chloride + Aluminium sulphate →
Barium sulphate +
Aluminium chloride
3.
(111) Sodium + Water Sodium hydroxide + Hydrogen
Write a balanced chemical equation with state symbols for the
following reactions.
(1) Solutions of barium chloride and sodium sulphate in water react
to give insoluble barium sulphate and the solution of sodium
chloride.
(ii) Sodium hydroxide solution (in water) reacts with hydrochloric
acid solution (in water) to produce sodium chloride solution and
water
प्लीज आंसर दिस क्वेश्चन ​

Answer 1

Explanation:

Chemical Reactions and Equations starts by citing a few daily life examples involving a chemical change. The observations of the activities mentioned determine whether a chemical reaction has taken place. The first part of the chapter, Chemical Reactions and Equations focuses on the concept of chemical equations. Here, it explains the representation of chemical reactions in word equation form. Further, it deals with writing a balanced chemical equation which is extensively covered in a stepwise manner. Apart from this, writing the symbols of physical states of reactants and products involved in the chemical reactions in addition to its examples are also discussed in the chapter, Chemical Reactions and Equations. The following types of chemical reactions are covered along with a detailed description of the features of those reactions along with suitable examples:

Combination reaction

Decomposition reaction

Displacement reaction ..... thanku

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Answer 2

Answer:

1. A MAGNESIUM RIBBON SHOULD BE CLEANED BEFOUR BURNING IN AIR BECAUSE:

a)TO REMOVE THE MAGNESIUM OXIDE LAYER FROM THE RIBBON WHICH MAY PREVENT OR SLOW DOWN THE BURNING OF MAGNESIUM RIBBON.

b) UNWANTED IMPURITIES DEPOSITED ON THE MAGNESIUM RIBBON CAN BE REMOVED AND ONLY PURE MAGNESIUM CAN BE USED FOR THE REACTION.

2. a)H2+CI2=2HCL

b)AI2(SO4)3+3BaCI2=2AICI3

Explaination:

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