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  • 3 answers
Dispersion and total internal refraction

Geetha Sri 5 hours ago

Dispersion and scattering of light

Yashi Saxena 16 hours ago

Dispersion
  • 5 answers

Rukhsana Parveen 21 hours ago

Bromine

Manish Routhan 21 hours ago

BROMINE

Daksh Batra 23 hours ago

Bromine-non metal Metal-mercury

Vansh Mittal 1 day, 1 hour ago

Bromine

Muskan Muskan 1 day, 2 hours ago

Bromine
  • 1 answers
https://www.jagranjosh.com › articles Web results CBSE Class 10 Science Sample Paper for Term 1 Board Exam 2021-22 (with Answers and Marking Scheme) - Jagran Josh Go through this link👆🏻
  • 5 answers

Trupti Toke 1 day, 8 hours ago

Pulmonary viens

Ansh Yadav 1 day, 17 hours ago

pulmonary vein

Neha Roy 1 day, 21 hours ago

Pulmonary vein

Nisha Parmar 1 day, 21 hours ago

pulmonary vein

Harshit Bhandary 1 day, 23 hours ago

Veins
  • 5 answers

Ripan Abc 1 day, 22 hours ago

Colourless

Komal Yadav 2 days, 4 hours ago

No change

Bishnudatta Mahapatra 2 days, 6 hours ago

No Color change will happen in acidic solutions.

Rahul Raj 2 days, 6 hours ago

Ok thanks

Ishita 💜 2 days, 6 hours ago

Colourless
  • 5 answers

Neha Roy 1 day, 20 hours ago

Magnesium ribbon is rubbed before burning because it has a coating of basic magnesium oxide.

Anagha Pratinidhi 1 day, 21 hours ago

Magnesium oxide... Because before performing the activity of burning the ribbon in air we rub it with sandpaper in order to remove/get rid of the magnesium oxide coating on it.

Nisha Parmar 1 day, 5 hours ago

calcium carbonate

Ripan Abc 1 day, 22 hours ago

According to me 2mg+ o2= 2mgo

Sandhya Kumari 1 day, 5 hours ago

calcium carbonate
  • 5 answers

Neha Roy 1 day, 21 hours ago

Ca(oH)2

Anagha Pratinidhi 1 day, 21 hours ago

Ca(OH)2

Prathi Tharun 2 days, 3 hours ago

Ca(OH)2
caoh2

Daksh Batra 2 days, 16 hours ago

Ca(OH)2
  • 2 answers

Neha Roy 2 days, 20 hours ago

Lens is a transmissive optical device which focuses of disperses a light beam by means of refraction.

Vansh Mittal 23 hours ago

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  • 5 answers

Shaik Aashiq 3 days, 5 hours ago

Concave

Akanksha Tyagi 3 days, 17 hours ago

Concave

Nirbhay Kumar 3 days, 18 hours ago

Concave

Komal Yadav 3 days, 19 hours ago

Concave mirror

Brayan John Jacob 3 days, 19 hours ago

Concave
  • 4 answers

Sia 🤖 4 days, 21 hours ago

The walls of the alveoli is folded and provide a large surface area for gaseous exchange. It also contains an extensive network of blood vessels which help in easy exchange of gases. 

Ansh Yadav 1 day, 17 hours ago

Alveoli are the sacs which are help in the exchange of gases such as oxygen and carbon dioxide. alveoli has rich/good network of blood capillaries which help in diffusion of both the gases. hope that answers your question.

Gungun Pandey 2 days, 16 hours ago

The Fall of the Allo wheel is pole and provide a large surface area the copper glass of exchange it also contain and extinguish network of blood vessels which help in easy exchange of gases

Neha Roy 2 days, 20 hours ago

The alveoli are thin walled and richly supplied with a network of blood capillaries to facilitate the exchange of gases between blood and the air filled in alveoli.
  • 5 answers
To remove both carbon and oxygen (but carbon is more appropriate for this question)

Gungun Pandey 2 days, 16 hours ago

Because magnesium is highly reactive to glases (oxygen) so it from a layer of oxide that need clean

Komal Yadav 3 days, 19 hours ago

To remove the impurities from it so that it can react with oxygen.

Chirag Patil 5 days, 15 hours ago

because Magnesium is highly reactive to gases (oxygen) so it forms a layer of oxide that needs clean

Bhumi Thapliyal 5 days, 18 hours ago

Magnesium is very reactive metal when it is kept in the open air it can react with gases present in the air..... The high reactive nature of magnesium is the reason ribbon should be cleaned Hope u understand the answer.....
  • 3 answers

Sujeet Kumar Singh 2 days, 8 hours ago

Hs

Madhu Singh Madhu Singh 6 days, 5 hours ago

Thank you

Prajapati Vijayshree 6 days, 4 hours ago

This content has been hidden. One or more users have flagged this content as inappropriate. Once content is flagged, it is hidden from users and is reviewed by myCBSEguide team against our Community Guidelines. If content is found in violation, the user posting this content will be banned for 30 days from using Homework help section. Suspended users will receive error while adding question or answer. Question comments have also been disabled. Read community guidelines at https://mycbseguide.com/community-guidelines.html

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Remember the goal of this website is to share knowledge and learn from each other. Ask questions and help others by answering questions.
  • 1 answers

Sushil Kokate 6 days, 7 hours ago

Covalent bonding takes place in carbon it shares it's 4 valence electrons with some other nonmetal to get helium gas configuration.
  • 1 answers

Sia 🤖 6 days, 21 hours ago

What do you need ?

  • 1 answers
Country Maps - Blogger Mind Map Of Metals And Nonmetals Class 10 Go through this
  • 1 answers

Anshika Yadav 1 week, 1 day ago

*A kidney is composed of an enormous number of uriniferous tubules. They are also known as nephrons or renal tubules or kidney tubules.Nephrons are the structural and functional units of the kidney.Each kidney is formed of about 1 million nephrons.Nephrons are held together by a connective tissue*. Structure of nephron: Each nephron is made of a glomerulus and a renal tubule. Glomerulus: It is a tuft of anastomosing blood capillaries formed by the fine branches of the  afferent arteriole. These capillaries of the glomerulus again unite to form the efferent arteriole.The afferent arteriole is wider than the efferent arteriole.The afferent arteriole brings blood into the glomerulus, while the efferent arteriole collects blood from the glomerulus. Renal Tubule: The renal tubule comprises the following regions: Bowman’s Capsule The Bowman’s capsule lies in the cortex.It is a thin double-walled, cup-like depression.It is the blind end of the nephron.The glomerulus is located in the concave depression of the Bowman’s capsule.The Bowman’s capsule and the glomerulus together are called Malpighian Capsule or Renal Capsule.The outer layer of the Bowman’s capsule is made of flattened epithelial cells.The inner layer is in close contact with the glomerulus and bears special cells called podocytes.Podocytes have many feet-like processes called pedicels and minute slit-like pores called slit pores.    Proximal Convoluted Tubule (PCT) PCT lies in the cortex.It is also known as the first convoluted tubule.The Bowman’s capsule continues into the PCT.It is lined with a layer of columnar epithelial cells.The columnar cells are with numerous microvilli to increase the surface area of absorption.    Loop of Henle It lies in the medulla.It is U-shaped.It is not convoluted.It has a descending limb and an ascending limb.Each limb has a thick region towards the cortex and a thin region towards the medulla.Thick regions are lined with columnar epithelial cells.Thin regions are lined with flat epithelial cells.           Distal Convoluted Tubule (DCT) It lies in the cortex.Its short terminal part is called a collecting tubule.The collecting tubule opens into the collecting duct.DCT in lined with ciliated columnar epithelial cells.The collecting duct receives the contents of many renal tubules.The collecting duct is a larger duct which receives collecting tubules of several nephrons.Collecting ducts pass into the renal medulla and join with each other to form the ducts of Bellini.The ducts of Bellini run through the renal pyramids and open into calyces.All calyces open into the pelvis.From the pelvis, urine is carried to the urinary bladder through the ureters.
  • 1 answers

Navneet Kumar 1 week, 2 days ago

Because there is less intercellular space between the molecules and high atrraction between the molecules
  • 1 answers

Selvaraju Srinidhi 1 week, 2 days ago

This activity is about burning a magnesium ribbon . If you burn a magnesium ribbon you can identify that there will be a white flame produced and a white product (MgO) . This is a activity to explain that a chemical reaction takes place when there is a chance in state , temperature,colour and evolution of gas . Here, the identification property is white dazzling flame . Equation :- 2Mg + O2 = 2MgO Note :- 1) scratch the magnesium ribbon with sand paper before burning because there is a layer of MgO ( magnesium oxide ) over it which prevents further reaction . 2) wear a sunglass before you do this experiment to not affect your eyes while burning .

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