Students and Teacher's Forum

Students and Teachers Forum

Pavement tissue is a type of epithelial tissue in which cells are arranged like pavement.

The main example is simple squamous epithelium, formed by one single layer of flattened cells, covering surfaces like blood vessels .....

2. List three functions of leaves.

Leaves helps in photosynthesis. Leaves helps to exchange oxygen and carbondioxide in plant. Leaves helps in .....

3. Rewrite these groups of words as sentences. The first word of the sentence is underlined.
1. princess in Nepal very was beautiful there a
2. marry wanted her father prince her to a handsome
3. interested music dance but she was in more and painting
4. arranged the teacher king a dance her for
5. soon became world-famous princess the a dancer

There was a very beautiful princess in Nepal. Her father wanted her to marry a handsome prince. But she was more interested in dancing and painting. The king arranged a dance teacher for her. The princess soon became a world famous .....

4. Fill in the blanks with there is or there are:
Bikash has a beautiful room. His bed is on the right. ....................... two framed photographs above his bed. These are the photographs of his parents. ....................... a table to the left of the bed. And ........................ a chair near the table.

Bikesh has a beautiful room. His bed is on the right. There are two framed photographs above his bed. These are the photographs of his parents. There is a table on the left of the bed. And there is a chair near the .....

5. How many body parts do human have?

It is hard to answer because I don't know what exactly are you asking for. There are over 206 bones in our body, but they are compounded from 300 different pieces. There are 79 organs in human body. Every organ is special so it's hard to .....

6. Give reason.
Skin is an epithelial tissue.

Epithelial tissues are the tissues which are located on the outermost part of our body and protect internal organs. Do you know where is skin located in our body? Does the definition of epithelial tissues which is given above matches with function .....

7. Give reason.
The eye is an organ.

Organ is combination of different tissues and is capable of doing particular task. Do you know how many tissues are there in eye? It contains epithelial tissues, muscular tissues and nervous tissues right? And does it have particular .....

8. Argon is an inert gas. Why?

The atomic number of the Argon is 18. Hence, its electronic configuration is 2, 8, 8. Here, the outermost shell contains 8 electrons which means it is in octet state. Therefore, it doesn't take part in chemical reactions. So, .....

9. In which group does oxygen lie?

The atomic number of oxygen is 8. Hence, its electronic configuration is 2, 6. Since the outermost shell of the oxygen contains 6 electron. So oxygen is placed in the VI A group of the periodic .....

10. What is peace?

Peace may be defined as the situation when there is no voilence between the communities. Peace is an occurrence of harmony characterized by the lack of violence, conflict behaviors and the freedom from fear of violence. Peace the condition when .....

11. What is the relative charge of an electron?

The relative charge of the any charged particle is the comparison of the charge with respect to the charge of a proton ( + 1.6 ⨉ 10-19 C) Hence, Relative charge = Charge of the particle / Charge of the proton. Since, the magnitude of .....

12. What is part of speech?

In the English language or any other language, words are considered as the smallest unit that gives some meaning. These words are categorized into several different types, based on their use and functions. These categorizations are called .....

13. State the factors that affect the climate on the earth.

Latitude: Latitudes are the imaginary horizontal lines on the surface of the earth. The more the latitude degree, cooler the climate. According to this, equatorial regions are hotter than polar regions because sun rays fall vertically on lower .....

14. Write a description of the impact of deforestation on wildlife.

Forests cover 31% of the land area on our planet. They produce vital oxygen and provide shelter and resources to the people and wildlife. All of the animals that haven't already been domesticated depend on .....

15. Write essay about "changing the role of women in society".

In earlier days, women had a very stereotypical role in society. If they were married, they stayed at home to look after the children while their husband worked and brought in the weekly wage. If single, they did work which usually involved some .....

16. What is heterotropic, autotropic and saprophytics?

An organism that manufactures its own food from inorganic substances, such as carbon dioxide and ammonia. Most autotrophs, such as green plants, certain algae, and photosynthetic bacteria, use light for .....

17. Why are bacteria cell called prokaryotic cell?

A prokaryotic cell is a unicellular organism that lacks a membrane-bound nucleus (karyon), mitochondria, or any other membrane-bound organelle. Bacteria lack all of the organelles so they are called the prokaryotic .....

18. निबन्ध लेख्नुहोस्ः नेपालमा जैविक विविधता

जैविक विविधता भन्नाले जीव जन्तुसम्वन्धी भन्ने वुझिन्छ । यसमा प्राणी र वनस्पती पर्दछन् । .....

19. निबन्ध लेख्नुहोस्ः एक राष्ट्रिय नायक

यसलाई आधार बनाएर आफूलाई मनपर्ने नायकको बारेमा लेख्नुहोस् है । एउटा आदर्श विद्यार्थी आफ्नो .....

20. The first three terms of a geometric series are 3 and 96. If the sum of the series is 189, find the number of terms.

Please recheck the question. There is one term missing. Only two out of three terms are .....

21. Oxygen is also called a vital gas. Why?

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22. Oxygen is collected by the downward displacement of water. Why? Give reason.

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23. What happens when carbon monoxide reacts with oxygen, give balanced chemical equation?

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24. What happens when phosphorus reacts with oxygen, give balanced chemical equation?

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25. What happens when calcium react with oxygen, give balanced chemical equation?

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26. What happens when glucose react with oxygen, give balanced chemical equation?

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27. What happens when sulphur dioxide react with oxygen, give balanced chemical equation?

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28. Draw the molecular structure of oxygen gas.

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29. How do you test the oxygen gas in the laboratory?

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30. Draw a well labelled diagram for the laboratory preparation of oxygen gas by using heat.

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31. Why is oxygen called a vital gas?

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32. Why is oxygen collected by the downward displacement of water?

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33. Why should we use MnO₂ in the lab preparation of oxygen gas without and with the use of heat?

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34. Write down any three chemical properties of oxygen gas with a balanced chemical equation.

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35. Describe the manufacturing process of oxygen gas.

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36. Write any four uses of oxygen gas.

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37. In the given figure, ∆ABC and parallelogram MBCN have common base BC and between same parallels MN and BC. Prove that area of ∆ABC = area of rectangle APCN.

Here, Area of MBCN = 2 ⨉ Area of △ABC [ The area of parallelogram is double triangle on same base and same parallels] Area of MBCN = NC ⨉ BC [ Area of rectangle = base ⨉ height] .....

38. What is nascent oxygen?

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39. List the whole numbers less than 5

The numbers that start from 0 are called whole numbers. The whole numbers less than 5 are listed .....

40. Write down the principle and balanced chemical equation for the laboratory preparation of oxygen gas without using heat.

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41. What happens when mixture of methane gas and water vapour is heated at a temperature of about 12000 C, 30 atmospheric pressure in the presence of a nickel catalyst? (Give chemical equation)

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42. What happens when hydrogen react with calcium at temperature of about 300^o C? (Give chemical equation)

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43. What happens when mixture of hydrogen and nitrogen under pressure is passed over heated iron? (Give chemical equation)

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