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Jaiyush19
Jaiyush19
@jaiyush19
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Joined: Sep 10, 2021
Last seen: Jul 13, 2023
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Topics: 2159 / Replies: 16
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Topic
Male gametophyte of angiosperms is shed as
4 years ago
Forum
Biology
Replies: 0
Views: 43
Topic
The “Eyes” of the potato tuber are (1) shoot buds (2) root buds (3) axillary buds (4) flower buds
4 years ago
Forum
Biology
Replies: 0
Views: 57
Topic
What is common between vegetative reproduction and apomixis?
4 years ago
Forum
Biology
Replies: 0
Views: 54
Topic
Which one of the following is correctly matched (1) Chlamydomonas - Conidia (2) Onion - Bulb (3) Yeast - Zoospores (4) Ginger - Sucker
4 years ago
Forum
Biology
Replies: 0
Views: 109
Topic
Select the wrong statement: (1) Chalmydomonas exhibits both isogamy and anisogamy and Fucus shows oogamy. (2) Anisogametes differ either in structure, function or behaviour.
4 years ago
Forum
Biology
Replies: 0
Views: 162
Topic
Monoecious plant of Chara shows occurrence of:
4 years ago
Forum
Biology
Replies: 0
Views: 161
Topic
What are hydrocarbons? Explain with examples. (b) Explain the meaning of saturated and unsaturated hydrocarbons with two examples each.
4 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 318
Topic
(a) Define isomers. Give one example of isomers. (b) Write the structural formula and electron-dot structure, of anyone isomer of n-heptane (C7H16)
4 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 492
Topic
What is graphite? Of what substance is graphite made? (b) Describe the structure of graphite with the help of a labelled diagram. (c) Why is graphite a good conductor of electricity but diamond is a non-conductor of electricity? (d) State any two ...
4 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 120
Topic
What is diamond? Of what substance is diamond made? (b) Describe the structure of diamond. Draw a simple diagram to show the arrangement of carbon atoms in diamond.
4 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 193
Topic
Write two points of difference in the structures of diamond and graphite. (b) Explain why, graphite can be used as a lubricant but diamond cannot. (c) Explain why, diamond can be used in rock drilling equipment but graphite cannot.
4 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 359
Topic
Giving their structures, state the number of single bonds, double bonds and triple bonds (if any) in the following compounds : (i) ethyne (ii) ethene (iii) benzene (b) Write the molecular formula and structure of cyclohexane.
4 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 167
Topic
What is the unique property of carbon atom? How is this property helpful to us? (b) Explain why, diamond is hard while graphite is soft (though both are made of carbon atoms).
4 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 161
Topic
Give the name and structural formula of one member each of the following : (i) alkane (ii) alkene (iii) alkyne (iv) cycloalkane (b) Give the common name of (i) ethyne, and (ii) ethene.
4 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 298
Topic
Why does the element carbon from a large number of carbon compounds? (b) Write down the structures and names of two isomers of butane (C4H10).
4 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 238
Topic
How can diamonds be made artificially? How do synthetic diamonds differ from natural ones? (b) Give any two differences between the properties of diamond and graphite.
4 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 268
Topic
Catenation is the ability of an atom to form bonds with other atoms of the same element. It is exhibited by both carbon and silicon. Compare the ability of catenation of the two elements. Give reasons.
4 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 139
Topic
Give IUPAC names and formulae of an organic compound containing single bonds and the other containing a triple bond. (b) Which of the following is the molecular formula of benzene? C6H6, C6H10, C6H12, C6H14
4 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 159
Topic
Friedrich Wohler converted an inorganic compound into an organic compound in the laboratory. (i) Give the name and formula of inorganic compounds. (ii) Write the name and formula of organic compound formed.
4 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 308
Topic
Give the general formula of an: (i) alkane (ii) alkene (in) alkyne. (b) Classify the following compounds as alkanes, alkenes and alkynes: C2H4, C3H4, C4H8, C5H12, C5H8, C3H8, C6H6
4 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 160
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