Preparations and Reactions of Sodium Oxide

Q.

Among the following oxides which is least acidic

1. B₂O₃

2. CO₂

3. Al₂O₃

4. NO₂

Q. The compound formed upon combustion of Na in excess air is

1. Na₂O₂

2. Na₂O

3. NaOH

4. NaO₂

Q. 1.6 gram metal reacts with oxygen and produce 2.0 gram metal oxide find equivalent weight of metal

Q. why the boiling point of chlorides of carbon family decreases down the group, metallic character increases down the group, so ionic character increases as halide is a non metal , on the other hand we know that ioinic compounds have more boiling and melting point than covalent comound, why that rule is not applied here

Q. Acc.to latice enthalpy concept ionic character is more in LiCl than NaCl, KCl but there is acc.to fajan rule LiCl have high covalent character than these two compound.is it really possible to have both ionic and covalent charcter more than the other two compound

Q. Peroxides of group IA metals are

1. Paramagnetic

2. unreactive towards strong acids

3. Thermally stable even at high temperatures

4. Diamagnetic

Q. Why we cant take oxidation state of H as -1 in NaH2PO4 while calculating o.s of P? Hydrogen is attached with alkali metal so why its o.s cant be -1

Q.

$Na+O_2\left(excess\right)\underrightarrow{{350}^{\circ }C}$ ______

1. Na₂O₂

2. 

3. Na₂O

4. 

Q. The hydroxides of alkaline earth metals are less basic than alkali metals of the corresponding periods. Why?

Q. Sodium nitrate decomposes above $-{800}^{o}C$ to give
(IIT-JEE, 1998)

1. $N_2$
2. $O_2$
3. $N{O}_2$
4. $N{a}_{2}O$

Q. Sodium nitrate decomposes above $-{800}^{o}C$ to give
(IIT-JEE, 1998)

1. $N_2$
2. $O_2$
3. $N{O}_2$
4. $N{a}_{2}O$

Q. write about the basic nature of oxides with example of group 1 and group 2

Q.

IN REDOX REACTION //// TOPIC -OXIDATION NUMBER METHOD , THERE IS A STEP THAT WE HAVE MAKE INCREASE=DECREASE?IS THIS SAME FOR ACIDIC BASIC