Which acid causes the sourness of green apples?

citric acid

malic acid

lactic acid

formic acid

Malic acid is more sour than citric acid, and is the source of extreme tartness in so-called extreme candy. Malic acid occurs naturally in all fruits and many vegetables.

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Answers by country

Poland

25%

56%

24984

Germany

26%

52%

13%

India

34%

49%

973

the Netherlands

32%

46%

14%

New Zealand

40%

44%

France

32%

40%

12%

16%

Republic of Ireland

38%

36%

13%

11%

Nigeria

28%

35%

20%

13%

123

Pakistan

48%

35%

10%

110

Australia

50%

34%

10%

130

Unknown

40%

34%

14%

12%

South Africa

46%

34%

15%

the United States

49%

31%

893

the United Kingdom

51%

30%

10%

510

Canada

56%

29%

the United Arab Emirates

50%

29%

Malaysia

56%

28%

Singapore

68%

22%

the Philippines

55%

21%

11%

Indonesia

46%

19%

30%

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What is the effect of nicotinic acid on human organism?

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It is harmful, causes cancer

It is highly toxic, kills in 10 seconds

It is essential for functioning

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