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

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Correct Answer: C