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About 98 percent of the mass of ever...

About 98 percent of the mass of every living organism is composed fo just six elements including carbon, hydrogen , nitroge , oxygen and

A

Calcium and phosphorus

B

Phosphours and sulphur

C

Sulphur and magnesium

D

Magnesium and sodium

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The correct Answer is:
B
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About 98 percent of the mass of every living organism is composed of just six elements including carbon, hydrogen, nitrogen, oxygen and

ninety five milliliters of a mixture of a gaseous organic compound (A) and just sufficient amount of oxygen required for the complete combution yields on burning 40 ml of CO_2 and 70 ml of water vapour along with 10 ml of nitrogen all volumes measured at the same temperature and pressure. Compound (A) contains carbon, hydrogen and nitrogen only as the consitituent elements. Calculate: (a). The volume of O_2 requried for complete combustion (b). The molecular formula of (A).

Knowledge Check

  • About 98 percent of the mass of every living organisms is composed of just six elements including carbon, hydrogen, nitrogen, oxygen and

    A
    sulphur and magnesium
    B
    magnesium and sodium
    C
    calcium and phosphorus
    D
    phosphorus and sulphur

  • about 98 percent of the mass of every living organism is composed of just six element including carbon , hydrogen nitrogen oxygen and :

    A
    calcium and phosphorus
    B
    phsophorus and suphur
    C
    suphur and magnesium
    D
    magnesium and sodium

  • 98% of living organism is formed of six elements-carbon , hydrogen , nitrogen , oxygen and

    A
    S & Mg
    B
    Mg & Na
    C
    Ca & P
    D
    P & S

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    98% of all living organisms is made up of just following number of elements.

    98% of all living organisms is made up of just following number of elements.

    Adenine is a substituted form of a heterocyclic nitrogenous base Purine. Adenine is found in both polymers DNA and RNA . Adenine is composed of the elements carbon, hydrogen and nitrogen and has molecular mass of 13.5 amu . Upon analysis, it was found that the ratio of % (by w.t. ) of carbon to that of total % (by wt ) of hydrgoen and nitrogen was found to be 4:5 respectively. The ratio of number of N atoms to hydrogen atoms is 1 : 1 . Now, answer the following questions: In one molecule of adenine :

    Adenine is a substituted form of a heterocyclic nitrogenous base Purine. Adenine is found in both polymers DNA and RNA . Adenine is composed of the elements carbon, hydrogen and nitrogen and has molecular mass of 13.5 amu . Upon analysis, it was found that the ratio of % (by w.t. ) of carbon to that of total % (by wt ) of hydrgoen and nitrogen was found to be 4:5 respectively. The ratio of number of N atoms to hydrogen atoms is 1 : 1 . Now, answer the following questions: The amount of glucose (C_(6)H_(12)O_(6)) obtained when all the carbon in 36 mg of adenine is converted into glucose is :

    A functional group is an atom or group of atoms which determines the characteristic functions or chemical properties of a particular organic compound. A functional group contains one or more atoms of elements other than carbon such as oxygen, nitrogen, sulphur and halogens. These atoms are known as heteroatoms and they can replace one or more hydrogen atoms in a hydrocarbon chain. These heteroatoms are responsible for the specific properties of organic compounds regardless of nature and length of carbon chain. These heteroatoms or group of heteroatoms are known as functional groups. The examples of functional groups are - OH, - F,- Cl, -Br, - CHO, - COOH, - NO_(2), - NH_(2) , etc. The functional group of alcohol is

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