METALS AND NON METALS

Reaction between X and Y forms compound Z. X loses electron and Y gains electron. Which of the following properties is not shown by Z?

• Has high melting point

• Has low melting point

• Conducts electricity in molten state

• Occurs as solid

The electronic configurations of three ele¬ments X, Y and Z are X — 2, 8; Y — 2, 8, 7 and Z — 2, 8, 2. Which’of the following is correct?

• X is a metal

• Y is a metal

• Z is a non-metal

• Y is a non-metal and Z is a metal

Which one of the following metals do not react with cold as well as hot water?

• Na

• Ca

• Mg

• Fe

Which of the following oxide(s) of iron would be obtained on prolonged reaction of iron with steam?

• FeO

• Fe2O3

• Fe3O4

• Fe2O3 and Fe3O4

Which of the following are not ionic compounds?

(i) KCl

(ii) HCl

(iii) CCl4

(iv) NaCl

• (i) and (ii)

• (ii) and (iii)

• (iii) and (iv)

• (i) and (iii)

Which one of the following four metals would be displaced from the solution of its salts by other three metals ?

• Mg

• Ag

• Zn

• Cu

Although metals form basic oxides, which of the following metals form an amphoteric oxide ?

• Na

• Ca

• Al

• Cu

Al₂O₃ + 2NaOH → …… + H₂O

• Al(OH)₃

• Na₂O

• NaAlO₂

• AlNaO₂

Which of the following metals catch fire on reaction with air?

• Magnesium

• Manganese

• Potassium

• Calcium

Metals, except Al and Zn, react with oxygen to form _______ oxides.

• acidic

• neutral

• amphoteric

• basic