Some properties of chemical substances are mentioned below... i. sour taste ii. slippery touch iii. yields alkaline gas with ammonium salt iv. has pH less than 7 v. turns phenolphthalein pink.

Which of the above are NOT typical properties of alkalis?

• A i, iv and v
• B iv and v
• C i and iv
• D ii and v
• E ii, iii and iv