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  • 1 answers

Kashish Garg 4 years, 2 months ago

Do not say these dirty words… This is the story of… not all of them.
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  • 1 answers

Anil Kumar Mohapatra 4 years, 2 months ago

Nacl
  • 3 answers

Nitin Tripathi 4 years, 2 months ago

When we win from our life

Vedika Kengale 4 years, 2 months ago

When we will get the vaccine and stay healthy and safe then it will be the end of corona

Mamta ... 4 years, 2 months ago

Yes why not
  • 1 answers

Adithya Dev A 4 years, 2 months ago

It is true to say that digestion starts right in the mouth. When food reaches our mouth, it comes in contact with saliva, the secretion of salivary gland, which consists of salivary amylase. This enzyme helps in breaking down nearly 30% of starch present in the food into maltose thus facilitating carbohydrate digestion.
In which of the given chemical equations, the abbreviations represent the correct states of the reactants and products involved at reaction temperature? A) 2H₂ (l) + O₂ (l) → 2H₂O (g) B) 2H₂ (g) + O₂ (l) → 2H₂O (g) C) 2H₂ (g) + O₂ (g) → 2H₂O (l) D) 2H₂ (g) + O₂ (g) → 2H₂O (g) An element X on exposure to moist air turns reddish-brown and a new compound Y is formed. The substances X and Y are A) X = Fe, Y = Fe₂O₃ B) X = Ag, Y = Ag₂S C) X = Cu, Y = CuO D) X = Al, Y = Al₂O₃ In which of the given, heat energy will be evolved? A) Electrolysis of water B) Dissolution of NH₄Cl in water C) Burning of L.P.G. D) Decomposition of AgBr in the presence of sunlight A dilute ferrous sulphate solution was gradually added to the beaker containing acidified permanganate solution. The light purple color of the solution fades and finally disappears. Which of the given equation is the correct explanation for the observation? A) KMnO₄ is an oxidizing agent, it oxidizes FeSO₄ B) FeSO₄ acts as an oxidizing agent and oxidizes KMnO₄ C) The color disappears due to dilution, no reaction is involved D) KMnO₄ is an unstable compound and decomposes in the presence of FeSO₄ to a colourless compound
  • 3 answers

Sahil Anwar 4 years, 2 months ago

Thanks brother ?

Adithya Dev A 4 years, 2 months ago

A) Option - c. B) Option - a. C) Option - c. D) Option - a.

Mamta ... 4 years, 2 months ago

The question is very confusing Sahil??
  • 3 answers
A substance is formed to make a new substance which is called a chemical change. Ex- making curd from milk.

Mamta ... 4 years, 2 months ago

In a chemical change new substance is formed n usually it is irreversible.

Aman Kumar 4 years, 2 months ago

Chemical change occurs when one substance combain another substance ex:- Salt Mix in water
  • 1 answers

Khushi 4 years, 2 months ago

A change which occurs without a change in the composition and chemical nature of the substance is called a physical change. It means that there is a change only in the physical properties of the substance. Properties like colour, hardness, rigidity, fluidity, density, melting point and boiling point are known as physical properties. Melting of ice or boiling of water is a physical change because ice, water and water vapours are chemically the same substance that is H2O.㋡
  • 1 answers

Ricky Tomar 4 years, 2 months ago

Bcj
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Aman Kumar 4 years, 2 months ago

Alveoli is baloon like structure

Priya Tomar 4 years, 2 months ago

Tiny air sacs at the end of the bronchioles ,tiny branches of air tubes in the lungs

Ankit Kumar 4 years, 2 months ago

It is known as site of exchange it is balloon like structure.
  • 1 answers

Dhruv .. 4 years, 2 months ago

See the main tip for science board exam is ,just read each and every line of science ncert textbook and solve the inside chapter questions given in the blue colour of every chapter of your syllabus ,ncert is enough .nothing else as far as the board exams are concerned.
  • 2 answers

Dhruv .. 4 years, 2 months ago

See, the numerical questions are only asked from the chapters electricity and light . From my suggestion ,you should first solve each and every question of your science NCERT textbook exercises including examples , then go through the blue coloured questions which are given inside the chapters itself .

Nainshi Rajawat 4 years, 2 months ago

S Chand and NCERT based question are asked.
  • 2 answers

Mamta ... 4 years, 2 months ago

Liver secrets bile juice n bile juice contains bile salts, which breaks down large globules /particles of fats into smaller pieces

Ankit Kumar 4 years, 2 months ago

Bile juice is secreted by liver. Bilejuice help in emulsification of food from large fat globules to small globules
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Adithya Dev A 4 years, 2 months ago

A layer of air consisting of gases, mist, raindroplets, smoke, fog and many other particles which acts as an umbrella which seperates the earth from the nearby space is called atmosphere. It is divided into 5 namely TROPOSPHERE, STRATOSPHERE, MESOSPHERE, THERMOSPHERE and EXOSPHERE.
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Adithya Dev A 4 years, 2 months ago

STDs can be prevented :- 1) Using mechanical barrier methods like IUCD, copper - t, etc. 2) Less sexual intercourse. 3) Prevention of unprotected ***.
  • 1 answers

Himanshu Rawat 4 years, 2 months ago

Preparation Method Of Washing Soda are : • NaCl + NH3 + CO2 + H2O → NaHCO3 + NH4Cl • 2 NaHCO3 → Na2CO3 + H2O + CO2 • Na2CO3 + 10H2O → Na2CO3.10H2O
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Vaishnavi Chaturvedi 4 years, 2 months ago

A substance is a pure single form of matter. It cannot be separated into other kinds of matter by any physical process. The substance must be composed of atoms and molecules. The substance must have a particular amount weight, mass and volume...

Vinayak Tiwari Racer 4 years, 2 months ago

HH
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Adithya Dev A 4 years, 2 months ago

1) Guarantees good health of the mother and the former children (if any). 2) Helps control population growth.
  • 2 answers

Vaibhav Singh 4 years, 2 months ago

Pata nhi

Adithya Dev A 4 years, 2 months ago

In spherical mirrors, a distant object concentrates or appeares to converge its light rays to the focus. But, the rule for image formation states that a ray of light PARALLEL to mirror is reflected to the focus. Therefore, light from distant source is said to be parallel. But, actually, these light rays need not be parallel.
  • 5 answers

Tanmayee Senapati Tanu 4 years, 2 months ago

1:2:2:4:1

Rohan Kumar 4 years, 2 months ago

It is 1:2:1:2:4:2:1:2:1

Adithya Dev A 4 years, 2 months ago

Sorry. It is 1:2:2:4:1:2:1:2:1.

Adithya Dev A 4 years, 2 months ago

Not sure.

Adithya Dev A 4 years, 2 months ago

1:2:2:4:2:2:1, I guess.
  • 2 answers

Samuel Dayal 4 years, 2 months ago

Yess

Sonu Kumar 4 years, 2 months ago

Yes
  • 5 answers

Roy Kr 4 years, 2 months ago

It helps in the separation of oxygenated and Deoxygenated blood. It helps in double circulation. It gives us Suffeicent amount of energy to maintain our constant body temperature..

Tay Tay 4 years, 2 months ago

It helps in the prevention of mixing of blood... It enhances the flow of blood.

Pankaj Rai 4 years, 2 months ago

does not allowed the deoxygenated blood to mixed with oxygenated blood and does resultes an efficient supply of oxygen in the organisms having four chambered heart

Shubham Didwagh 4 years, 2 months ago

Helps to oxygenate blood

Oav Papadahandi 4 years, 2 months ago

#manav...
  • 2 answers

Roy Kr 4 years, 2 months ago

Xylem and pholem are called vascular tissue which helps in the transportation of food ,water and minerals...

Adithya Dev A 4 years, 2 months ago

Vascular tissues are complex permanent tissues in plants which facilitate easy movement of materials into the plant. Also known as vascular bundles, these are xylem (water and minerals) and phloem (soluble food products of photosynthesis).
  • 3 answers

Tanu Srivastava 4 years, 2 months ago

No

Tay Tay 4 years, 2 months ago

No they do not conduct electricity whereas ionic compounds conduct electricity(only in molten state)

Adithya Dev A 4 years, 2 months ago

No. As they exist as molecules and do not dissociate into free moving ions when in aqueous solutions.
  • 1 answers

Mamta ... 4 years, 2 months ago

The combination of Y chromosome from males with one X chromosome from females results in an offspring with genetic constitution – XY. The child produced is a male or a son. Thus, the birth of a boy or a girl is purely a matter of chance and entirely depends on the type of sperm which fertilises the egg.
  • 1 answers

Anuj Todkar 4 years, 2 months ago

a) Testis - secrete testosterone harmone and produce sperms b) Vas Deferens - Transport mature sperms to urethra C) Epididymis - Transport sperm to vas Deferens D) ******* - Stores the testes or holds the testes E) Seminal Vesicle - Functions to many of the constituent ingredients of semen. HERE IS YOUR ANSWER :):)
  • 3 answers

Kaivalya Kumar 4 years, 2 months ago

Don't forget differentiation...

Janani Janani 4 years, 2 months ago

1. Vegatative propogation 2. What is DNA and it's copies 3. Sexual reproduction in flower and male and female reproductive system 4. Contraceptive methods to reduce unwanted pregnancy 5.what is STD and it's problems 6. What is regeneration

Alice Badodiya 4 years, 2 months ago

Diagrams are must

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