7 Crystal System- Cubic, Tetragonal, Orthorhombic |1Minute Chemistry | SMSir | IIT-JEE|NEET |#SHORTS

Tetragonal and orthorhombic crystal systems have same axial angles.

Match the crystal system / unit cells mentioned in Column I with their characteristic features mentioned in Column II. Indicate your answer by darkening the appropriate bubbies of the 4xx4 matrix given in the ORS. {:(,"Column I",,"Column II"),((A),"Simple cubic and face - centred cubic",(p),"have these cell parameters a = b = c and " alpha = beta = gamma),((B),"cubic and rhombohedral",(q),"are two crystal systems"),((C ),"cubic and tetragonal",(r ),"have only two crystallography angles of " 90^(@)),((D),"hecagonal monoclinic",(s),"belong to same crystal system"):}

Lithium borohydride crystallizes in an orthorhombic system with4 molecule per unit cell. The unit cell dimensions are a= 6.8overset(@)A , b =4.4overset(@)A and c=7.2overset(@)A . If the cell molar mass is 21.76 then the density of crystal is:

Lithium borohydride crystallizes in an orthorhombic system with 4 molecule per unit cell. The unit cell dimensions are a=6.8Å,b=4.4Å and c=7.2Å . If the molar mass is 21.76 , calculate density of crystal.