Please select a subject first
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The gas A is used by most of the animals to obtain energy from food by the process of respiration. When A is acted upon by radiation X, it gets converted into another gas B which is an allotrope of A but poisonous when inhaled. B forms a kind of layer C in the upper atmosphere which absorbs radiations X coming from a source Y and prevent them from reaching the earth. Some chemicals Z released from the various devices on the earth are destroying the layer C slowly. In fact, a hole has already been formed in layer C over the area D of the earth.
(a) What are gases (i) A, and (ii) B? Write their molecular formulae.
(b) Name the layer C.
(c) What are (i) X, (ii) Y, and (iii) Z?
(d) Name the area D.
(e) Name any two human ailments which may be caused by X.
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Compounds of carbon with hydrogen alone are called ______.
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CnH2n is the general formula of ______ hydrocarbons.
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The property of carbon atoms to form long chains in compounds is called ______.
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Write the names and structural formulae of all the possible isomers of hexane.
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Which of the following is the molecular formula of benzene?
C6H6, C6H10, C6H12, C6H14
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Which of the two has a branched chain?
Isobutane or normal butane
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Why does the element carbon from a large number of carbon compounds?
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Give the name and structural formula of one member of the following:
Alkyne
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Write the molecular formula of benzene.
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What is the unique property of carbon atom? How is this property helpful to us?
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Giving the structure, state the number of single bonds, double bonds, and triple bonds (if any) in the following compound:
Benzene
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Write the molecular formula and structure of cyclohexane. How many covalent bonds are there in a molecule of cyclohexane?
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What are hydrocarbons? Explain with examples.
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Explain the meaning of saturated hydrocarbons with two examples.
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How many isomers of the following hydrocarbon are possible?
C4H10
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How many isomers of the following hydrocarbon are possible?
C5H12
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How many isomers of the following hydrocarbon are possible?
C6H14
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An alkyne has seventy five carbon atoms in its molecule. The number of hydrogen atoms in its molecule will be ______.
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A diamond-toothed saw is usually used for cutting ______.
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