CHEMISTRY CLASS-9TH (MCQs=1707)

Chromium solution having +3 oxidation state has ………colour
a) blue                                                   

b) red     
c) green                                

d) orange

Show answer Comments

---

Blue coloured solution of chromium has oxidation state of  ………
a) +3  

b) +2                      

c) +6  

d) +5

Show answer Comments

---

Chromium solution having +6 oxidation state has ………… color
a) blue                                                   

b) red     
c) green                                 

d) orange

Show answer Comments

---

The oxidation number of all the elements in the free state is ………….
a) +1  

b) zero                  

c) +2  

d) -1

Show answer Comments

---

Oxidation number of Cl2 is …………
a) +1  

b) zero                  

c) +2  

d) -1

Show answer Comments

---

H2 has an oxidation number of ……….
a) -1   

b) +2                      

c) zero

d) +5

Show answer Comments

---