A student used the following steps in testing for a non-reducing sugar.
I. added Benedict's solution to the sugar solution
ll. added dilute hydrochloric acid to the sugar and boiled it;
lll. added sodium hydroxide solution to the solution in ll. and boiled;
IV. added Benedict's solution to the cooled solution in lll.
Use this information above to answer the question.
What is the importance of step ll in the testing process? To
neutralize the sugar solution
soften the sugar solution
change the colour of the sugar solution
increase the acid content of the sugar solution
Correct answer is A
No explanation has been provided for this answer.
A student used the following steps in testing for a non-reducing sugar.
I. added Benedict's solution to the sugar solution
ll. added dilute hydrochloric acid to the sugar and boiled it;
lll. added sodium hydroxide solution to the solution in ll. and boiled;
IV. added Benedict's solution to the cooled solution in lll.
Use this information above to answer the question.
Why did the student add the dilute hydrochloric acid to the sugar solution in step ll? To
oxidize the sugar solution
hydrolyse the sugar solution
dry the sugar solution
increase the volume of the sugar solution
Correct answer is B
No explanation has been provided for this answer.
The main difference between a seed and a fruit is that a fruit
is large while a seed is small
has two scars while a seed is has one
is pigmented while a seed is not
can be dispersed by animals while a seed cannot
Correct answer is B
No explanation has been provided for this answer.
Which of the following characteristic features is not associated with monocotyledonous plants?
Well differentiated sepals and petals
Presence of fibrous root system
Presence of narrow leaves
Flora parts are in multiples of three
Correct answer is A
No explanation has been provided for this answer.
Which of the following processes removes carbon (IV) oxide from the atmosphere?
Burning fuels
Putrefaction
Photosynthesis
Respiration in plants
Correct answer is C
No explanation has been provided for this answer.