CHEMISTRY Nature of the substances Prepare beetroot indicator and test some acids and bases. Write a report.​

Answer:

The fraction 5/4 is a rational number.

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Answer:

Rational

Step-by-step explanation:

5+√4 = 5+2 = 7, which is a rational number

Rational numbers→ Number that can be written in the form of p/q, where p and q are integers and q ≠ 0.

Irrational numbers→ Number that can't be written in the form of p/q is irrational number.

Answer:

B.2-amino-1H-purin-6(9H)-one

Explanation:

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Answer:

The chemical name of guanine is [tex]2[/tex]-amino-[tex]6[/tex]-oxypurine.

Explanation:

Guanine is one of the four nitrogen bases in the nucleic acids, DNA and RNA. It belongs to a purine group while rest of the options are pyrimidines. Purines have two ringed structure composed of carbon and nitrogen atoms, and the pyrimidine group has single ringed structure. The preferred IUPAC name of guanine is [tex]2[/tex]-amino-[tex]1[/tex],[tex]9[/tex]-dihydro-[tex]6[/tex]H-purin-[tex]6[/tex]-one, and other names are 2-amino-6-hydroxypurine, 2-aminohypoxanthine. Guanine along with adenine, cytosine, thymine are the bases in DNA and with uracil instead of thymine forms RNA bases.

Answer:

oils have lower melting points

Answer:

Option A (Oil is saturated triglyceride) is an incorrect statement.

Explanation:

Option A is incorrect because the oils are composed of unsaturated fatty acids or triglycerides.

Option B. is correct as Oils have a lower melting point, some oils even have melting points below 0°C. For example soybean oil, Olive oils.

Option C is correct since the oils have a low melting point at room temperature they are mostly found in the liquid state.

Option D is correct as Glyceryl trioleate(triolein) is an oil found in many fats and oils such as olive oils and has the structure of a triglyceride which means triolein is an example of oil along with coconut oil, olive oil.

The correct answer is option B.

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Answer: A) CnH2nOn

Explanation:Monosaccharides, which are commonly known as sugars, are either aldehyde-aldoses or ketoses,the general formula of monosaccharides is (CH2​O)n​, and polysaccharides are formed by monosaccharide units bound together by glycosidic linkages. formula is  Cn​(H2​O)n−1​ .