Question 6 :
Sodium gives blue color with $NH_3$ solution, this blue colour is due to&#160;<br/>

Question 7 :
What is the correct increasing&#160;order of solubility of the following salt?<br/>$NaHCO_3,\&#160; KHCO_3,\ Mg(HCO_3)_2,\ Ca(HCO_3)_2$&#160;

Question 8 :
Choose the correct answer form the alternatives given.<br>Match column I with column II and mark the appropriate choice.<table class="wysiwyg-table"><tbody><tr><td></td><td>Column I</td><td><br></td><td>Column II</td></tr><tr><td>(A)</td><td>Li</td><td>(i)</td><td>$M_2O_2$</td></tr><tr><td>(B)</td><td>Na</td><td>(ii)</td><td>$MO_2$</td></tr><tr><td>(C)</td><td>Rb</td><td>(iii)</td><td>$M_2O$</td></tr></tbody></table>

Question 12 :
A saturated hydrocarbon is shown by ${ C }_{ n }{ H }_{ 20 }$ . The value of $n$ in this compound is:<br/>

Question 13 :
The organic compounds having double or triple bond(s) in them are termed as ________________.

Question 15 :
$CH_3CH_2CH_2CH_3 \, \xrightarrow {Br_2 \, / \, hv}$<br>Major product in the above reaction is: