Question 1 :
During ionization metals lose electrons, this change can be called :

Question 3 :
Which of the following compounds is obtained when lime water dries up.

Question 9 :
The number of electrons lost or gained by an atom refers to :

Question 10 :
Which of the following is a common characteristic of a covalent compound ?

Question 12 :
Molecular reactions which are generally slow reactions are shown by :

Question 13 :
<table><tr><th>Column A</th> <th>Column B</th> </tr><tr><td>1. Metal</td> <td>a.Methane (CH{tex}_4{/tex})</td> </tr><tr><td>2. Covalent compound</td> <td>b.Sodium chloride (NaCl)</td> </tr><tr><td>3. Non-polar</td> <td>c.Selenium (Se)</td> </tr><tr><td>4. Polar</td> <td>d.Chloride ion (Cl{tex}^{–}{/tex})</td> </tr><tr><td>5. Non-metal</td> <td>e.Aluminium (Al)</td> </tr><tr><td>6. Electrovalent compound</td> <td>f.Carbon dioxide (CO{tex}_2{/tex})</td> </tr><tr><td>7. Anion</td> <td>g.Hydrogen chloride (HCl)</td> </tr><tr><td>8. Cation</td> <td>h.Potassium ion (K{tex}^{+}{/tex})</td> </tr></table>

Question 16 :
Bonding in this molecule can be understood to involve coordinate bonding :

Question 17 :
The capacity of an atom to attract the shared pair of electrons towards itself is called :

Question 19 :
A compound which contains all the three types of bonds i.e., ionic, covalent and coordinate is :