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Question (1)

QN005242

Which solution is commonly used to test the presence of starch in food?

(A) Lime water
(B) Iodine solution
(C) Vinegar
(D) Salt solution

Correct Answer: B

Explanation:

Iodine solution is used to test starch.

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Question (2)

QN005243

A blue-black colour after adding iodine solution indicates the presence of:

(A) Fat
(B) Protein
(C) Starch
(D) Water

Correct Answer: C

Explanation:

Starch turns blue-black with iodine.

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Question (3)

QN005244

Which food sample is most likely to turn blue-black when tested with iodine solution?

(A) Potato
(B) Cooking oil
(C) Egg white
(D) Butter

Correct Answer: A

Explanation:

Potato contains starch.

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Question (4)

QN005245

In the starch test, iodine solution acts as a:

(A) Nutrient
(B) Indicator
(C) Preservative
(D) Solvent

Correct Answer: B

Explanation:

Iodine is an indicator for starch.

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Question (5)

QN005246

A student adds iodine solution to rice paste and observes a blue-black colour. What can be concluded?

(A) Rice contains fat
(B) Rice contains starch
(C) Rice contains protein only
(D) Rice contains minerals only

Correct Answer: B

Explanation:

Blue-black colour confirms starch.

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Question (6)

QN005247

Which of the following is NOT expected to show a positive starch test?

(A) Wheat flour
(B) Bread
(C) Sugar solution
(D) Rice

Correct Answer: C

Explanation:

Sugar does not contain starch.

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Question (7)

QN005248

A food sample gives no blue-black colour with iodine. This suggests that the sample may lack:

(A) Protein
(B) Fat
(C) Starch
(D) Water

Correct Answer: C

Explanation:

Absence of blue-black colour indicates no starch.

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Question (8)

QN005249

The blue-black colour in a starch test appears because iodine reacts with:

(A) Protein molecules
(B) Fat molecules
(C) Starch molecules
(D) Water molecules

Correct Answer: C

Explanation:

Iodine reacts with starch.

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Question (9)

QN005250

Which observation correctly indicates the presence of starch?

(A) Red colour appears
(B) Blue-black colour appears
(C) Green colour appears
(D) White colour appears

Correct Answer: B

Explanation:

Blue-black colour is the positive test for starch.

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Question (10)

QN005251

A student tests boiled rice, potato and sugar. Which sample is least likely to turn blue-black?

(A) Rice
(B) Potato
(C) Sugar
(D) Rice flour

Correct Answer: C

Explanation:

Sugar does not contain starch.

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Question (1)

Which solution is commonly used to test the presence of starch in food?

Explanation:

Link:

Question (2)

A blue-black colour after adding iodine solution indicates the presence of:

Explanation:

Link:

Question (3)

Which food sample is most likely to turn blue-black when tested with iodine solution?

Explanation:

Link:

Question (4)

In the starch test, iodine solution acts as a:

Explanation:

Link:

Question (5)

A student adds iodine solution to rice paste and observes a blue-black colour. What can be concluded?

Explanation:

Link:

Question (6)

Which of the following is NOT expected to show a positive starch test?

Explanation:

Link:

Question (7)

A food sample gives no blue-black colour with iodine. This suggests that the sample may lack:

Explanation:

Link:

Question (8)

The blue-black colour in a starch test appears because iodine reacts with:

Explanation:

Link:

Question (9)

Which observation correctly indicates the presence of starch?

Explanation:

Link:

Question (10)

A student tests boiled rice, potato and sugar. Which sample is least likely to turn blue-black?

Explanation:

Link:

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