Question

1. Read the following table and answer the following Questions

Substance Lead Brass Zinc Copper Iron Aluminum Kerosene Ice Water

Specific heat 0.031 0.092 0.093 0.095 0.115 0.21 0.50 0.50 1

i) What is the SI unit of Specific heat ?

ii) Which metal is best for cooking utensils?

iii) Which metal is used to soldering the wires?

iv) Write the formula of specific heat of the substance?

12. Observe the following table and answer the questions

Organic Compound Methane Ethane Propane Butane Pentane

Formula CH4 C2H6 C3H8 C4H10 C5H12

i) What type of homologous series is this ?

ii) Write the general formula of this homologous series?

iii) What is meant by homologous series?

iv) Write the next organic compound formula

13. Define the following

a) Ohm’s law b) Kirchhoff’s Junction law

14. Give two important uses of washing soda and baking soda​

Answer 1

Answer:

ii. Brasss best for kitchen utensils

I. the S. I unit of specific heat is joule

iii. lead is used for soldering wire

Answer 2

Answer:

1.j/ kg- k

2.alumium

3.iron

4.