class 10 chemistry worksheet
   SOURCE-PREVIOUS YEAR QUESTION PAPER

1. Draw the electron dot structure for
 (a) Ethanoic acid
  (b) Propanone

2.Why does micelle formation take place when soap is added to water?Explain with  the help of a diagram

3. An organic compound A is widely used as a preservative in pickles.This compound reacts with  ethonol to form a sweet smelling compound B.
(i) Identify the compound A
(ii) Write  the chemical reaction for its reaction with ethanol to form compound B
(iii) How can we get compound A from compound B?
(iv) Name the process and write corresponding chemical equation.
(v)Which gas is produced when compound reacts with washing soda? Write the chemial equation.

class 10 REVISION WORKSHEET
 source: pevious year question paper

1. Write chemical equations for the following reactions
(a)  sodium metal is added to ethanoic acid
(b) solid sodium carbonate is added to ethanoic acid
(c)Ehanoic acid reacts with dilute solution of sodium hydroxide

2.(a) Name the products formed when ethane burns in the air.Write a balanced chemical equation for the reaction
(b)Why is reaction between methane and chlorine called a substitution reaction?

3.represent the following reactions with the help of chemical equation
 (a) Esterification
 (b) saponification
  (c) Hydrogenation

Source-CBSE CLASS 10 QUESTION PAPER 2016(SET-1)

1.Write the name and the molecular formula of an organic compound having its name suffixed with ‘ol’ and having two carbon atoms in its molecule. Write a  balanced equation to show what happens when this compound is heated with excess H₂SO₄ and name the main product formed .What is the role of conc. H₂SO₄ in the reaction

2. Ann organic compound ‘P’ is a constituent of wine. P when reacted with acidified K₂CrO₇ forms another compound ‘Q’. When a piece of sodium is added to the compound Q , a gas’ R’ is evolved that burns with a pop sound. Name P,Q AND R.Also write the chemical reactions involved.

3.  a. You have three unlabelled  test tubes containing  ethanol,ethonoic  acid and soap solution. Using litmus paper and sodium metal identify the three substances.

b. Give the cause of formation of scum, when soaps are treated with hard water.

CHEMISTRY WORKSHEET (CLASS-IX)
LESSON- ATOMS AND MOLECULES

1.Calculate the molecular masses of
a.Ammonia
b. Quick lime
c.Baking soda
d.Chlorine gas
e.Methane

2.what is the mass of 0.2 mole of oxygen atoms?

3.calculate the mass percentage of each element of sodium chloride in one mole of it.

4.work out he formulae of the following compounds.also name the ions present in each of them.
a.Magnesium chloride
b.iron sulphide
c.Aluminium sulphate

5 write the formula of the compounds formed by the following ions
a. Ca2+ , CO2_
b. Mg2+, Cl_

CHEMISTRY WORKSHEET (CLASS -10)
LESSON-CARBON AND ITS COMPOUNDS

1. Draw stuctures of the folowing compounds
a.Ethonoic acid
b. Bromopentane
c.Butanone
D.Methyl ethonate
e.Ethyl ethonate

2.Write chemical equations of reaction of ethanoic acid with
 a, Sodium
b.Sodium carbonate
c.Ethanol in presence of con. H2SO4

3.Give a chemical test to distinguish between
a. Soaps and detergents
b. ethane and ethene
c.ethanol and ethanoic acid

4. How many isomers can be drawn for pentane?

5.What is hydrogenation?What is its industrial application?
6. Name the second member of alkynes family.Give its structure