Question

Q.1Name and state the law which is kept in mind while we balance a chemical equation
Q.2Write the chemical equation for reactions that take place when lead nitrate and potassium iodide solutions are mixed.
Q.3Write the balanced chemical equation to represent the following reaction:
Carbon monoxide reacts with hydrogen gas at 340 atm. to form methyl alcohol.
Q.4What happens when an iron nail is put inside the copper sulfate solution? Write a reaction with observation.
Q.5Name the raw materials used is the manufacture of sodium carbonate by Solvay process?
Q.6A compound X of sodium is commonly used in kitchen for making crispy pakoras. It is also used for curing acidity in the stomach. Identify ‘X’. What is its chemical formula? State the reaction that takes places when it is heated during cooking?
Q.7Metal compound ‘A’ reacts with dilute hydrochloric acid to produce efferenvescence. The gas evolved extinguishes a burning candle. Write a balanced chemical equation for the reaction, if one of the compounds formed is calcium chloride.
Q.8What Do You Understand By The Amphoteric Oxide? Give some example and also reaction.
Q.9What Is The Process Of Brine Preparation?
Q.10Generally when metals are treated with mineral, acids. Hydrogen gas is liberated but when metals (except Mn and Mg) are treated with HNO3, hydrogen is not liberated, why?
Q.11 When a metal X is treated with cold water, it gives a basic salt Y with molecular formula XOH (molecular mass = 40) and liberates a gas Z which easily catches fire. Identify X, Y and Z and also write the reaction involved.
Q.12 (I)Give name for a metal that forms two types of oxides and rusts in moisture; write their formulae also

(2)Name two metals which can displace hydrogen from dilute HCL.

(3)Give name for a metal used in hot water systems
Q.13How Does The Digestion Take Place In Human Being?
Q.14Describe The Circulation System Of Human Body?
Q.15Explain The Human Respiratory System In Brief?

*Answer the given questions*​

Answer 1

Answer:

1. law of conservation of mis

2. Pb(NO3)2+KI

3. CO+2H -340atm-- CH + OH

4. When an iron nail is put into solution a brown coating of copper is formed

observation- copper solution changes from blue onto light green