CHEMISTRY CLASS-9TH (MCQs=1707)

Chemical formula has…….. types.
a) three  

b) two                     

c) one     

d) four

Show answer Comments

---

Smallest  whole number ratio of atoms is shown by…………
a) empirical Formula

b) molecular formula
c) a & b both                                       
d) none of these

Show answer Comments

---

Molecular formula of Benzene is………..
a) C6H                                                    

b) C6H6 
c) CHO                                  

d) CH2O

Show answer Comments

---

Empirical formula of Glucose is……..
a) CH2O                                                

b) CHO 
c) C6H6                                   

d) C6H12O6

Show answer Comments

---

Molecular formula = ……………
a) n(Empirical formula)
b) n/(Empirical formula)
c) (Empirical formula)/n  

d) none of these

Show answer Comments

---

Molecular mass of ethane is………..
a) 30 amu                                             

b) 28 amu                

c) 24 amu                                           

d) 32 amu

Show answer Comments

---