Explanation:
The separation technique of benzoic acid from diethyl ether is first the usage of the base and then acid.
As, benzoic acid is soluble in diethyl ether and on adding base, it forms sodium benzoate which is soluble in aqueous layer and thus separates from diethyl ether. Acid is then added to convert sodium benzoate in the aqueous layer back to benzoic acid.
But, in the given question, acid is added first and then base and this went wrong.
Answer: C It shows the meaning of the symbols used on the map
Explanation:The key of a map is usually used for if the map is complicated like with symbols like triangles that usually represent mountains.
Which one of the following was tentatively proposed by Gardner as a possible ninth type of intelligence?
d. Existential
Answer:
b) visibility, time and distance you need to avoid collisions
Explanation:
Large space margins on the roadway provide visibility, time and distance you need to avoid collisions.
Large space margins on road helps increase visibility and maneuvering space in case of an emergency or collision.
