1. . pH stands for:
(A) Power of hydrogen
(B) Power of halogens
(C) Power of hexane
(D) Power of heat
2. . The optimum range of pH for yeast is:
(A) 1.5-3.5
(B) 4.5-5.5
(C) 6.5-7.5
(D) 8-11
3. . The minimum range of pH for Bacteria is:
(A) 1.5
(B) 3.5
(C) 4.5
(D) 7.5
4. . Maximum range of pH for Mould is:
(A) 8-11
(B) 7-8.5
(C) 5.4-6.3
(D) 3.5-5
5. . The value of water activity ranges from:
(A) 1-10
(B) 0-1
(C) 1-100
(D) 0-10
6. . Water activity expressed as:
(A) pH
(B) aW
(C) Eh
(D) B0
7. . Microbial inhibitors present in the plant are:
(A) Vitamin A
(B) Citric acid
(C) Gossypol
(D) Malic Acid