Oxides and Oxoanions

Q. Among the given set of oxides the sets in which both the oxides are not amphoteric is/are: $M{n}_2{O}_7,Cr{O}_3,C{r}_2{O}_3,CrO,V_2{O}_5,V_2{O}_4$

1. $V_2{O}_5,C{r}_2{O}_3$
2. $M{n}_2{O}_7,Cr{O}_3$
3. $CrO,V_2{O}_4$
4. $V_2{O}_5,V_2{O}_4$

Q.

Barium reacts vigorously even with cold water while Mg reacts slowly with warm water. Mg does not react with cold water easily while Beryllium does not react even with boiling water.

1. False

2. True

Q.

Which of the following reaction produces Hydrogen?

1. Marshall's acid with water

2. Mg + H2O

3. Na₂O₂ + H₂O

4. All of the above

Q.

The oxidation state of $Cl$ in $CaOC{l}_2$ is

1. +2

2. -2

3. -1

4. +1

Q.

$2Mn{O}_4^{-}+5H_2{O}_2+6H^{+}⟶2Z+5O_2+8H_{2}O$
In this reaction Z is

1. Mn⁺²

2. Mn⁺⁴

3. MnO₂

4. Mn

Q. $TiC{l}_4$ fumes strongly in moist air and is hydrolyzed by water to give

1. $Ti$
2. $TiOC{l}_2$
3. $Ti{O}_2$
4. $Ti{O}_3^{2-}$

Q. What type of oxides are formed by metals?

Q. What is oxidising agent

Q. is substance that gets oxidised called a reducing agent and the substance that gets reduced called a oxidising agent??

Q.

Choose the correct statement:

1. Across a period electropositivity of elements increases

2. Across a period acidic nature of oxides increases

3. Across a period basic nature of oxides increases

4. Across a period metallic character increases

Q. name 5 series of line that occurs in the atomic spectrum of hydrogen and indicate the region of electromagnetic spectrum where these series occur.

Q. Which is the strongest oxidising agent ?

Q. $Cr{O}_3$ is a/an:

1. Acidic oxide
2. Basic oxide
3. Neutral oxide
4. Amphoteric oxide

Q. $Cr{O}_3$ is a/an:

1. Acidic oxide
2. Basic oxide
3. Neutral oxide
4. Amphoteric oxide