General Science Class 7th MCQs=836

Chemical formula of Hydrochloric acid is…...
a) HCa                        
b) HCl
c) H2SO4                     
d) none of these

Show answer Comments

---

Chemical formula of sugar is………..
a) C₁₂H₂₂O₁₁   
b) CaCO₃
c) H₂SO₄                     
d) none of these

Show answer Comments

---

Atoms of same element having same number of protons but different number of neutrons are called……..
a) valiancy                  
b) Ion
c) isotopes                  
d) none of these

Show answer Comments

---

Which of the following property/ies of the most isotopes are the same?
a) chemical                 
b) physical
c) both a and b            
d) none of these

Show answer Comments

---

An atom has no overall charge if it contains equal number of……….
a) electrons & neutrons
b) electrons & protons
c) protons & neutrons  
d) positrons & neutrons

Show answer Comments

---

Isotopes are found because atoms of the same element can have different number of:
a) protons                   
b) electrons
c) neutrons                 
d) none of the above

Show answer Comments

---