What is a covalent bond? What type of bond exists in (i) CCl4 (ii) CaCl2?

Physical change as CaCl2 is a hygroscopic substance which absorbs H2O without actually reacting with it.

Carbon can neither lose four of its electrons nor gain four electrons as both the processes require extra amount of energy and would make the system unstable. Therefore, it completes...

Due to presence of d-orbitals in Si, SiCl4 reacts with water but due to the absence of d-orbitals in C, CCl4 does not react with water. 

CCl4 will not give the white precipitate of AgCl on heating it with silver nitrate. This is because the chlorine atoms are covalently bonded to carbon in CCl4. To obtain...

(i) Al2(SO4)3→ Aluminium sulphate  (ii) CaCl2→ Calcium chloride  (iii) K2SO4→ Potassium sulphate  (iv) CaCO3→ Calcium carbonate

Atomicity is the number of atoms present in a molecule.  (i) H2SO4 = 7 atoms are present  (ii) CCl4 = 5 atoms are present. 

CaCl2is known to increase the efficiency of DNA uptake to produce transformed bacterial cells. The divalent Ca+2 ions supposedly create transient pores on the bacterial cell wall by which the...

The compounds that are formed due to sharing of electrons between. two atoms/ compounds having covalent bonds.  Ionic compounds are formed due to a transfer of electrons from one atom to...

Being an ionic compound NaCl gives Cl negative ion and thus gives White ppt. with silver nitrate but CCl4 is a covalent compound and thus do not give Cl negative...