Available Answers

1. 1.

   Fill in the blanks with suitable words :

   1. The energy of the sun is produced by the ________________.
   2. _______________ named hydrogen.
   3. Reactive metals react with ________________ water to produce hydrogen.
   4. _______________ is the magnetic ore of iron.
   5. Hydrogen gas is dried by passing it through ________________.
2. 2.

   Give equations for the following :

   1. Sodium metal is dropped in water.
   2. Electricity is passed in acidulated water.
   3. Steam is passed over red hot coke.
   4. Dilute hydrochloric acid is added to granulated zinc.
   5. Aluminium is made to react with hot and conc. alkali.
3. 3.

   Give one word for the following :

   1. Process by which energy is produced in sun.
   2. Zinc used in laboratory preparation of hydrogen.
   3. Method by which hydrogen gas is collected.
   4. Process in which carbon is converted to water gas.
   5. Process by which electricity is used to split water.
4. 4.

   Complete and balance the reactions :

   1. K + H₂O →
   2. Ca + H₂O →
   3. Zn + H₂SO_4 →
   4. Zn + NaOH →
5. 5.

   Fill in the blanks with suitable words :

   1. Hydrogen gas is ______________ than air.
   2. Hydrogen gas burns with a _______________ flame and pop sound.
   3. Hydrogen gas is absorbed by heated ________________.
   4. Ammonia is a _______________ hydride.
   5. When hydrogen is passed in vegetable oil _______________ is produced.
6. 6.

   With regard to Haber's process answer the following questions :

   1. Name the reactants and the ratio in which they are taken.
   2. Which catalyst is used in Haber's process ?
   3. Give the temperature and pressure used in Haber's process.
   4. Give the chemical equation for this process.