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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
What is the molecular formula and structural formula of a cyclic hydrocarbon whose one molecule contains 8 hydrogen atoms?
4 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 258
Topic
Write the molecular and structural formula of a cyclic hydrocarbon whose molecule contains 8 atoms of carbon.
4 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 141
Topic
Which of the following compounds can have a triple bond? C2H4, C3H4, C3H6
4 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 280
Topic
You are given the following molecular formulae of some hydrocarbons : C5H8; C7H4; C6H6; C5H10; C7 H12; C6H12 (a) Which formula represents cyclohexane as well as hexene?
4 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 248
Topic
An element E exists in three allotropic forms A, B and C. In allotrope A, the atoms of element E are joined to form spherical molecules. In allotrope B, each atom of element E is surrounded by three other E atoms to form a sheet-like structure.
4 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 223
Topic
The solid element A exhibits the property of catenation. It is also present in the form of a gas B in the air which is utilised by plants in photosynthesis. An allotrope C of this element is used in glass cutters.
4 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 245
Topic
Two organic compounds A and B have the same molecular formula C6H12. Write the names and structural formulae: (a) if A is a cyclic compound (b) if B is an open-chain compound
4 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 171
Topic
A solid element X has four electrons in the outermost shell of its atom. An allotrope Y of this element is used as a dry lubricant in machinery and also in making pencil leads.
4 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 289
Topic
Which one of the following statements is correct? (1) Tapetum nourishes the developing pollen (2) Sporogenous tissue is haploid (3) Hard outer layer of pollen is called intine
4 years ago
Forum
Biology
Replies: 0
Views: 125
Topic
Even in absence of pollinating agents seed setting is assured in
4 years ago
Forum
Biology
Replies: 0
Views: 282
Topic
What is the function of germ pore? (1) Initiation of pollen tube (2) Emergence of radicle
4 years ago
Forum
Biology
Replies: 0
Views: 178
Topic
Which one of the following statements is wrong? (1) Pollen grains in some plants remain viable for months. (2) When pollen is shed at two-celled stage, double fertilization does not take place. (3) Intine is made up of cellulose and - pectin. (4) Veg...
4 years ago
Forum
Biology
Replies: 0
Views: 119
Topic
Plants with ovaries having only one or a few ovules, are
4 years ago
Forum
Biology
Replies: 0
Views: 222
Topic
In which one of the following pollinations is autogamous?
4 years ago
Forum
Biology
Replies: 0
Views: 190
Topic
Wind pollination is common in (1) grasses (2) legumes (3) orchids (4) lilies
4 years ago
Forum
Biology
Replies: 0
Views: 230
Topic
A drupe develops in (1) pea (2) mango (3) tomato (4) wheat
4 years ago
Forum
Biology
Replies: 0
Views: 233
Topic
Both, autogamy and geitonogamy are prevented in (1) Castor (2) Papaya (3) Maize (4) Cucumber
4 years ago
Forum
Biology
Replies: 0
Views: 121
Topic
An organic substance that can withstand environmental extremes and cannot be degraded by an enzyme is:
4 years ago
Forum
Biology
Replies: 0
Views: 72
Topic
Transfer of pollen grains from the anther to the stigma of another flower of the same plant is called
4 years ago
Forum
Biology
Replies: 0
Views: 232
Topic
The scutellum observed in a grain of wheat or maize is comparable to which part of the seed in other monocotyledons?
4 years ago
Forum
Biology
Replies: 0
Views: 214
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