QUARTER-4, ENGLISH 4 ASSESSMENT TEST MODULE 1-2
Directions: Read each sentence and decide whether the underlined portion is a cause or an
ffect. Write your answer on the blank.
1. Whenever it rains, there are puddles in the backyard.
2. We all laughed when we saw tiny kitten scamper up the tree.
3. My uncle broke his leg when he crashed his motorcycle.
4. John went to the lake because he wanted to go fishing.
5. Brian forgot his notebook at school, so he couldn't do his homework.
6. Andrea was scared because it was storming.
7. The baby was crying, so Mom picked him up.
she was starving.​

The scheme below is from a series of reactions that are part of a synthesis of vitamin a. answer the following questions with reference to this scheme. (i) what is "reagent a"? (ii) draw a step-by-step mechanism which explains the formation of compound c from compound b (iii) which reagents would you use to form compound e from compounds c and d (reagents b and c)? for each reagent suggested above in (ii) explain the role of the reagent in the reaction to (iv) form compound e. you may wish to do this by drawing a mechanism. 1. addition of reagent a но reagent a 2. н, о" thо oh нон-с compound a. compound b. compound c .ch-оh 1. reagent b "сно 2. reagent c сh oh compound e. compound d.