PRACTICE QUESTIONS ON CHEMICAL PROPERTIES METALS AND NON METALS

Q1    Show that MgO is a basic oxide. Give suitable equations also.

Q 2   shows that CO₂  is an acidic oxide. Give suitable equations also.

Q3    Name the metal that reacts a) vigorously with air at room temperature.

                                                        b) On prolonged heating.

Q 4   A metal X on heating gives a white powdery substance.

                a) Identify the metal ‘X’

                 b)  Write the chemical formulae and name of the white substance formed.

                c) Write the chemical equation for the same.

                d) What will happen if this powder is dissolved in water? Name the compound formed.  Also write the chemical   equation for the same.

                 e) What will happen when red litmus is dipped into the above solution?

                 f) What will happen when blue litmus is dipped into it?

                 g)  What is the nature of the solution formed?

Q5  Name the metal that reacts vigorously with cold water.

Q6   Name the gas liberated when metals reacts with water.

Q7  Name the gas liberated when metals reacts with acids.

Q8  How will you test for the presence of hydrogen gas?

Q9  Name two metals that do not react with water.

Q10 Name one non metal that is kept under water. Why?

Q11 Why sodium is kept under kerosene?

Q12  What happens when

                         a) An active metal is placed in water.

                         b) A magnesium ribbon is kept in a test tube containing hot boiling water.

                         c) Gold is place in test tube containing NaOH.

                         d) When Dilute HCl is kept for three days in a copper container.

                         e)  Name two metals that react with conc. H2SO4.

Q13  Why food stuff should not be placed in a metal container.