CHEMISTRY CLASS-10TH (MCQs=1504)

Soaps are the sodium salts of the ………..
a) protein                                              

b) fatty acid        
c) carbohydrate                  

d) nucleic acid

Show answer Comments

---

When soap is added to hard water it is ionized into …………….
a) sodium ion                                      

b) stearate ion     
c) both a & b                                       

d) none of these

Show answer Comments

---

The ………… ions are present in water.
a)Ca+2                                                   

b) Mg+2 
c) Na+2                                                  

d) both a & b

Show answer Comments

---

The ions react with soap and produce an insoluble precipitate of calcium & magnesium steartes, which is called ………..
a) silicate                                              

b) Zeolite              

c) scum                                 
d) none of these

Show answer Comments

---

Show answer Comments

---

The chemical formula of sodium stearate is…...
a) Ca₊₊                                                  

b) C₁₇H₃₅COO
c) C₁₇H₃₅COONa                

d) (C₁₇H₃₅COO)₂Ca

Show answer Comments

---