MCQ
Which of the following is least basic?
- A$\left( CH _{3} CO \right) \ddot{ N } HC _{2} H _{5}$
- B$\left( C _{2} H _{5}\right)_{3} \ddot{ N }$
- ✓$\left( CH _{3} CO \right)_{2} \ddot{ N}H$
- D$\left( C _{2} H _{5}\right)_{2} \ddot{ N }H$

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
$Cu(s) + 2Ag^+(aq) \to Cu^{+2}(aq)+2Ag(s)$
$E_{cell}^o= + 0.46\, volt$.
If the concentration of $Cu^{+2}$ ions is doubled then $E_{cell}^o$ will be
| Column I | Column II |
| (a) Non ideal solution with positive deviation | (i) $H _2 O (57 \%)+ HI (43 \%)$ |
| (b) Maximum boiling azeotrope | (ii) $CHCl _3+\left( CH _3\right)_2 CO$ |
| (c) Non ideal solution with negative deviation | (iii) $C _2 H _5 OH (95.4 \%)+ H _2 O (4.6 \%)$ |
| (d) Minimum boiling azeotrope | (iv) $CCl _4+ C _6 H _5 CH _3$ |