10 mL of 1 N HCl is mixed with 20 mL of 1 M H2SO4 and 30 mL of 1 M NaOH. The resultant solution has

Explanation : No. of meq of H+ =N1V1+N2V2=10  ×  1+20 ×2=50∵   H2SO4,  N=2MNo. of  meq  of OH−=NV  =  30  ×  1=30No.  of  meq  of  H+ left  unreacted =  50−30=20  meq Hence, (1) is correct, (2), (3) and (4) are ruled out.Note:  Here 1 represents HCl & 2 represents H2SO4