LANGUAGE OF CHEMISTRY

I coined the term symbol of an element

• John Dalton

• John Mendel

• Issac Newton

• Berzelius

Following is true for chemistry

• It deals with study of matter

• It deals with constitution of matter

• It deals with chemical changes matter undergoes

• All of above

Which of the following are the true statements for symbol of an element?

• The symbol of element is derived from name of element either in English, German or Latin name.

• The symbol of element has the first letter in Upper case.

• The second letter (if any) is also in upper case.

• The symbol of elements may comprise of either single or two letters only

The above picture represents the symbol proposed by

• John Mendel

• John Dalton

• Johnny Deep

• Johnson and Johnson

The chemical formula of Calcium phosphate is

• Ca3(PO4)2

• Ca3(PO4)2

• Ca4(PO3)2

• Ca2(PO4)3

The coefficients for the chemical reaction NaHCO3 -------- --> Na2CO3 + H2O + CO2

• 2,1,1,1

• 1,2,1,1

• 1,1,2,1

• 1,1,1,2

The nitride radical is

• NO3-

• NO2-

• N3-

• N2-

The formula of Aluminium nitrate is

• Al(NO3)2

• Al(NO3)3

• Al(NO3)

• AlN

9. 1. Calcium nitrate A. (NH4)2CO3 2. Aluminium sulphide B. Ca(NO3)2 3. Ammonium carbonate C. Zn(NO2)2 4. Zinc nitrite D. Al2S3

• 1---B, 2---D, 3---A, 4---C

• 1---C, 2---A, 3---D, 4---B

• 1---A, 2---B, 3---C, 4---D

• 1---D, 2---C, 3---B, 4---A

Which of the following is true for balanced chemical equation?

• It provides information related to reactants and products

• It provides information about number of atoms of reactants and products

• It provides information about volumes of combining gases and products formed

• All of above