(English Medium) ICSE Class 9 - CISCE Question Bank Solutions for Chemistry

Select the correct answer to the reactant added, to give the product in the preparation of hydrogen gas.

\[\ce{Ca(OH)2 + H2}\]

Select the correct answer to the reactant added, to give the product in the preparation of hydrogen gas.

\[\ce{MgO + H2}\]

Select the correct answer to the reactant added, to give the product in the preparation of hydrogen gas.

\[\ce{Fe3O4 + H2}\]

Select the correct answer to the reactant added, to give the product in the preparation of hydrogen gas.

\[\ce{Al2(SO4)3 + H2}\]

Select the correct answer to the reactant added, to give the product in the preparation of hydrogen gas.

\[\ce{NaAlO2 + H2}\]

Give a balanced equation for the following conversion.

\[\ce{MgCl2<-HCl->FeCl2}\]

Give a balanced equation for the following conversion.

\[\ce{KAlO2<-KOH->K2ZnO2}\]

Give a balanced equation for the following conversion.

\[\ce{ZnO<-H2O->Fe3O4}\]

Give a balanced equation for the following conversion.

\[\ce{CO + H2<-H2O->CO2 + H}\]

Give a balanced equation for the following conversion.

\[\ce{NH3<-H2->H2S}\]

Give a reason for the following.

Granulated zinc is preferred to metallic zinc in the preparation of hydrogen using dilute acid.

What is a symbol? What information does it convey?

Why is the symbol S for sulphur, but Na for sodium and Si for silicon?

Write the full form of IUPAC. Name the elements represented by the following symbols:

Au, Pb, Sn, Hg

What do the following symbol stand for?

H

What do the following symbol stand for?

H₂ 

What do the following symbol stand for?

2H

What is meant by atomicity? Name the diatomic element.