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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
The second maturation division of the mammalian ovum occurs (1) until the nucleus of the sperm has fused with that of the ovum (2) shortly after ovulation before the ovum makes entry into the fallopian tube
4 years ago
Forum
Biology
Replies: 0
Views: 215
Topic
Which one of the following statements about human sperm is correct? (1) Acrosome serves as a sensory structure leading the sperm towards the ovum (2) Acrosome has a conical pointed structure used for piercing and penetrating the egg, resulting in f...
4 years ago
Forum
Biology
Replies: 0
Views: 228
Topic
Which one of the following statements about morula in humans is correct? (1) It has more or less equal quantity of cytoplasm and DNA as in uncleaved zygote (2) It has almost equal quantity of cytoplasm as an uncleaved zygote but much more DNA
4 years ago
Forum
Biology
Replies: 0
Views: 242
Topic
The part of fallopian tube closest to the ovary is
4 years ago
Forum
Biology
Replies: 0
Views: 285
Topic
Sertoli cells are found in (1) seminiferous tubules and provide nutrition to germ cells (2) ovaries and secrete progesterone
4 years ago
Forum
Biology
Replies: 0
Views: 217
Topic
Vasa efferentia are the ductules leading from
4 years ago
Forum
Biology
Replies: 0
Views: 144
Topic
Seminal plasma in human males is rich in: (1) DNA and testosterone (2) fructose and calcium (3) ribose and potassium (4) glucose and calcium
4 years ago
Forum
Biology
Replies: 0
Views: 116
Topic
The permissible use of the technique amniocentesis is for
4 years ago
Forum
Biology
Replies: 0
Views: 106
Topic
Name the reaction which is usually used in the conversion of vegetable oils to fats. Explain the reaction involved in detail. Write a chemical equation to illustrate your answer. (b) What is saponification? Write the chemical equation of the reactio...
4 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 301
Topic
When ethanoic acid reacts with sodium hydrogen carbonate, then a salt X is formed and a gas Y is evolved. Name the salt X and gas Y. Describe an activity with the help of a labelled diagram of the apparatus used to prove that the evolved gas is the...
4 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 378
Topic
What is meant by an addition reaction? Give an example (with equation) of an addition reaction of an alkene. (b) What is added to groundnut oil when it is to be converted to vanaspati ghee?
4 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 229
Topic
An organic compound X of molecular formula C2H4O2 gives brisk effervescence with sodium hydrogen carbonate. Give the name and formula of X. (b) A mixture of ethyne (acetylene) and oxygen is burnt for welding.
4 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 338
Topic
What happens when ethanoic acid reacts with sodium hydroxide? Write equation of the reaction involved. (b) What happens when vegetable oils are hydrogenated? Name the catalyst used.
4 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 151
Topic
What happens when methane reacts with chlorine? Give equation of the reaction which takes place. (b) What is hydrogenation? What is its industrial application? (c) Give any two differences between soaps and detergents.
4 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 297
Topic
How is ethanoic acid obtained from ethanol? Write down the chemical equation of the reaction involved. (b) How would you distinguish between ethanol and ethanoic acid by chemical test? (c) Explain the formation of scum when hard water is treated wi...
4 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 301
Topic
What is meant by a substitution reaction? Give an example (with equation) of the substitution reaction of, an alkane. (b) How is soap made? Write a word equation involved in soap making.
4 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 156
Topic
How does ethanoic acid react with sodium hydrogen carbonate? Give equation of the reaction which takes place. (b) Why are carbon and its compounds used as fuels for most applications?
4 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 319
Topic
Write names and formulae of hydrocarbons containing a single and a double bond (one example for each). Give one characteristic chemical property of each. (b) What is a detergent? Name one detergent. (c) Why have detergents replaced soap as a washin...
4 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 239
Topic
Describe, giving equation, a chemical reaction which is characteristic of saturated hydrocarbons (or alkanes). (b) What is an oxidising agent? Name two oxidising agents which can oxidise ethanol to ethanoic acid.
4 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 133
Topic
What happens when methane (natural gas) burns in air? Write the chemical equation of the reaction involved. (b) What happens when ethanoic acid reacts with sodium carbonate? (c) Write chemical equation of the reaction involved.
4 years ago
Forum
Carbon and Its Compounds
Replies: 0
Views: 229
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