IN  ANSWERING  QUESTIONS  7-64  THROUGH 7-67,  SELECT  FROM  COLUMN  B  THE SPOTTING  METHOD  DESCRIBED  IN  COLUMN  A. A. DESCRIP- B. METHODS TIONS 7-64. Two or more 1. Emulsification substances combined to 2. Chemical produce  one action or more new substances   3. Solution 7-65. The  adding  4. Mechanical of sub- action stances  to help the solvent in the removal of stains 7-66. The mixing of two substances,  one  of which  is  the  solvent 7-67. The use of a brush, spatula, and so forth, to work a cleansing  agent  into  the fabric to remove a stain SPOTTING  CHEMICALS A. Oxalic  acid B. Sodium  chloride C. Acetone D. Ammonia Figure  7A IN  ANSWERING  QUESTIONS  7-68 THROUGH  7-71,  REFER  TO  FIGURE 7A, WHICH LISTS CHEMICALS USED TO REMOVE SPOTS AND STAINS. 7-68. What  chemical  is  useful  in removing  rust? 1.  A 2.  B 3.  C 4.   D 7-69. What  chemical  should  the spotter use to remove fruit stains? 1.  A 2.  B 3.  C 4.  D 7-70. When the spotter has removed a stain  with  hydrochloric  acid, what chemical should be used to neutralize the action of the acid? 1.  A 2.  B 3.  C 4.  D 7-71. Toremove  stains  resulting  from resins, paints, or nail polish, what  chemical  is  used? 1.  A 2.  B 3.  C 4.  D 7-72. Before using a solvent to treat a spot or stain, you should first  determine  whether  the solvent will harm the article by testing it in a hidden portion of the clothing. 1. True 2. False 7-73. When  using  chemical  agents,  you should remove the agent immediately  after  applying  it to the clothing. 1. True 2. False 7-74. What part of the spatula should be used by the spotter in removing  spots? 1. The front end 2. The rounded end 3. The flat center 4. The tip of the point 7-75. A spatula may NOT be safely used on which of the following materials? 1. Synthetic 2. Cotton 3. Linen 4. Wool 66