Question 1 :
Electronic configuration of only one p-block element is exceptional. One molecule of that element consists of how many atoms of it?
Question 2 :
Assertion: Although $PF_5,PCl_5$ and $PBr_3$ are known, the pentahalides of nitrogen have not been observed.
Reason: Phosphorus has lower electronegativity than nitrogen
Question 3 :
The organic compounds having double or triple bond(s) in them are termed as ________________.
Question 10 :
Compounds of carbon and hydrogen which form long chains or branched chains are:
Question 11 :
A saturated hydrocarbon is shown by ${ C }_{ n }{ H }_{ 20 }$ . The value of $n$ in this compound is:<br/>
Question 12 :
Hydrocarbons are the organic compounds that contain the elements _______ and ________.
Question 13 :
Cancer is a disease where body cells grow unchecked. A protein found in the body interferes with the growth of cancer cells. It is used for the treatment of cancer. Identify it.
Question 14 :
What is the correct increasing order of solubility of the following salt?<br/>$NaHCO_3,\  KHCO_3,\ Mg(HCO_3)_2,\ Ca(HCO_3)_2$ 
Question 17 :
Which of the following has the highest tendency to give the following reaction?<br/>${ M }_{ (g) }^{ + }\xrightarrow [ medium ]{ aqueous } { M }_{ (aq) }^{ + }$
Question 18 :
Assertion: Size of the hydrated ion is in order $Li^{+}\,>\,Na^{+}\,>\,K^{+}\,>\,Rb^{+}\,\geq\,Cs^{+}$ which is just reverse of ionic size
Reason: Greater the charge or charge density, smaller the ionic size, greater the hydration hence, greater the size of the hydrated ion.
Question 19 :
Assertion: Among alkali metal cations, $Li^+(aq.)$ has highest electrical conductance.
Reason: $Li^+(aq.)$ is largest alkali metal cation because of greater degree of hydration.
Question 20 :
What is the value of electron gain enthalpy of ${Na}^{+}$ if $I{E}_{1}$ of $NA = 5.1 eV$ ?
Question 21 :
The alkali metals are low melting. Which of the following alkali metals is expected to melt if the room temperature rises to $30^o$?
Question 24 :
When sodium is treated with sufficient oxygen/air, the product obtained is:
