Question 1:

Write the structural formula of benzene. 

 

Question 2:

Define Isomer.

 

Question 3:

Two compounds have same molecular formula C₃H₆O. Write the name of these compounds and their structural formula.

 

Question 4:

How would you bring the following conversion: Ethanol to ethene (Give chemical reaction only).

 

Question 5:

Why carbon can neither form C⁴⁺ cations nor C^4– anions.

 

Question 6:

Why covalent compounds

(i) are bad conductors of electricity.

(ii) have low melting and boiling points.

 

Question 7:

Write the chemical formula and name of the compound which is the active ingredient of all alcoholic drinks. Why is it used in medicines? Write chemical equation and name of the product formed when this compound reacts with sodium metal.

 

Question 8:

Draw electron dot structure of methane. Name the type of bonds formed in this compound.

 

Question 9:

What happens when Propane burns in oxygen?

 

Question 10:

Write the molecular formula of ethene and draw its electron dot structure.

 

Question 11:

What is a homologous series of carbon compounds? Give an example and list its three characteristics. 

 

Question 12:

Distinguish between esterification and saponification reactions with the help of chemical equation for each.

 

Question 13:

What happens when 5% alkaline potassium permanganate solution is added drop by drop to warm propyl alcohol (propanol) taken in a test tube? Explain with the help of a chemical equation.

 

Question 14:

What is the difference between soaps and detergents? Why are soaps not very effective when a fabric is washed in hard water? How is this problem resolved?

 

Question 15:

Write the name of a saturated compound in which the carbon atoms are arranged in a ring. Give the number of single bonds present in this compound.

 

Question 16:

How would you name the following compounds?

1) CH₃-CH₂-CH₂-I

2) H₂C = O

 

Question 17:

How synthetic diamonds can be prepared?

 

Question 18:

Why gas stove used at home has inlets for air?

 

Question 19:

How would you convert Ethene to Ethane?

 

Question 20:

List the conclusions you will draw while studying the following properties of ethanoic acid:

(a) Odour

(b) Solubility in water

(c) Effect on litmus paper

(d) Reaction with sodium hydrogen carbonate

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