Question 1 :
Which of the following is an example of super octet molecule?

Question 2 :
Assertion: $H_{3}PO_{4}$ and $H_{3}PO_{3}$ both are present in fertilizers. Reason: $H_{3}PO_{3}$ increases the solubility of fertilizers.

Question 3 :
Nitrogen form $N_2$, but phosphorous form $P_2$, it'sat a time convert in $P_4$, reason is : -

Question 5 :
The type of bond between the atoms in a nitrogen molecule is :

Question 7 :
Which of the following is correct statement regarding $N(CH_3)_3$ and $N(SiH_3)_3$?

Question 10 :
Maximum number of covalent bonds formed by N and P respectively are :

Question 15 :
Nitrogen forms $N_2$ but phosphorus is converted into $P_4$ from $P_2$. The reason for this is:<br>

Question 17 :
In the nitrogen family the H -M -H bond angle in the hydrides $MH_3$&#160;gradually becomes closer to $90^o$ on going from N to Sb. This shows that gradually:

Question 18 :
Which of the following oxoacids of nitrogen has most acidic character?<br/>$I.\ N_2O_3 \\ II.\ NO_2 \\ III. \ N_2O_5 \\&#160;IV.\ NO$

Question 19 :
The Group VA element that makes up part of bones and teeth is:<br/>

Question 20 :
State True or False.<br/>Nitrous acid acts both as an oxidising and a reducing agent.

Question 22 :
The reactivity of the following compounds toward water is in the order:

Question 23 :
When bismuth chloride is poured into a large volume of water, the white precipitate formed is:

Question 24 :
The boiling point of the following hydrides follow the order of

Question 26 :
Nitrogen and phosphorus are both in Group 15 of the Periodic Table. Phosphorus forms a chloride with the formula $P{Cl}_{5}$ but nitrogen does not form $N{Cl}_{5}$.<br>Which statements help to explain this?<br>1. Nitrogen's outer shell cannot contain more than eight electrons.<br>2. Nitrogen cannot have an oxidation state of $+5$<br>3. Nitrogen is less electronegative than phosphorus.