A woman has difficulty concentrating on her job because she keeps worrying about things like leaving the door unlocked or the tap turned on. She feels that her house might be robbed or damaged any day because of her carelessness. According to this scenario, she is most likely suffering from .

OBSESSIVE COMPULSIVE DISORDER

Explanation:

A woman has difficulty concentrating on her job because she keeps worrying about things like leaving the door unlocked or the tap turned on. She feels that her house might be robbed or damaged any day because of her carelessness. According to this scenario, she is most likely suffering from OBSESSIVE COMPULSIVE DISORDER.

Obsessive compulsive disorder (OCD) is an anxiety disorder in which time people have recurring, unwanted thoughts, ideas or sensations (obsessions) that make them feel driven to do something over and over. Many people have focused thoughts or repeated behaviors

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question - in 1827, john walker, a druggist in a small english town, tipped a splint with sulphur, chlorate of potash, and sulphid of antimony, and rubbed it on sandpaper, and it burst into flame. the druggist had discovered the first friction-chemical match, the kind we use to-day. it is called friction-chemical because it is made by mixing certain chemicals together and rubbing them. although walker's match did not require the bottle of acid, nevertheless it was not a good one. it could be lighted only by hard rubbing, and it sputtered and threw fire in all directions. in a few years, however, phosphorus was substituted on the tip for antimony, and the change worked wonders. the match could now be lighted with very little rubbing, and it was no longer necessary to have sandpaper upon which to rub it. it would ignite when rubbed on any dry surface, and there was no longer any sputtering. this was the phosphorus match, the match with which we are so familiar. according the paragraph what was the benefit of the new phosphorus match? it burst into flame when rubbed on sandpaper. it was made by mixing chemicals. it could be ignited on any dry surface. it threw fire in all directions.

answer - matches required natural chemicals