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Calcium carbonate on heating decomposes into Calcium oxide and carbondioxide gas. This carbondioxide gas when passed into lime water forms Calcium carbonate. CaCO3 --> CaO + CO2 CO2 + Ca(OH)2 --> CaCO3 + H2O

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Kumar Dinesh Kumar Dinesh 4 years, 2 months ago

Who invented bacteria

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Baishna Ballabi Mishra 4 years, 2 months ago

Please give the answer

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Ameoba

Posted by Navaneetha Babu 4 years, 2 months ago

CBSE > Class 10 > Science

1 answers

Sia ? 4 years, 2 months ago

An amoeba, often called an amoeboid, is a type of cell or unicellular organism which has the ability to alter its shape, primarily by extending and retracting pseudopods. Amoebae do not form a single taxonomic group; instead, they are found in every major lineage of eukaryotic organisms.

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Function of cytoplasm

Posted by Sapna Upadhyay 4 years, 2 months ago

CBSE > Class 10 > Science

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Sia ? 4 years, 2 months ago

The cytoplasm is responsible for holding the components of the cell and protects them from damage. It stores the molecules required for cellular processes and is also responsible for giving the cell its shape.

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Melting point if mercury

Posted by Krishana Nagpal 4 years, 2 months ago

CBSE > Class 10 > Science

2 answers

Sia ? 4 years, 2 months ago

-38.83 °C

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Aayush Gupta 4 years, 2 months ago

234.17 K

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What is the melting point of mercury

Posted by Akash Verma 4 years, 2 months ago

CBSE > Class 10 > Science

1 answers

Shaila Amin 4 years, 2 months ago

-38.83°C

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Differentiate between concave lens and convex lens

Posted by Surjya Prakash Senapati 4 years, 2 months ago

CBSE > Class 10 > Science

2 answers

Anmol Preet 4 years, 2 months ago

? ?????? ???? is that which is thicker at the middle as compared to the edges. A convex lens converges light rays and hence is also called a converging lens. ? ??????? ???? is that which is thicker at the edges as compared to the middle. A concave lens diverges light rays and hence is also called a diverging lens.

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Amrita Yadav 4 years, 2 months ago

Convex lens - thicken at middle , Converging . Concave lens- thicken at the end , Diverging .

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What is the speed of light in air?

Posted by Sweta Kumari 4 years, 2 months ago

CBSE > Class 10 > Science

2 answers

Sweta Kumari 4 years, 2 months ago

3 × 10^8 m/s square

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Akash Verma 4 years, 2 months ago

299,792,458 meters per second to 299,702,547 meters per

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What is precipetate reaction

Posted by Shikhar Chauhan 4 years, 2 months ago

CBSE > Class 10 > Science

5 answers

Anmol Preet 4 years, 2 months ago

In precipitation reactions, aqueous solutions of two salts are mixed together whereby some salt precipitates due to mutual exchange of ions between the two salts.

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Om Tiwari 4 years, 2 months ago

Precipitation is process that involves in double displcement reaction.

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Aditya Anand 4 years, 2 months ago

Precipitation reaction is a type of double displacement reaction in which a substance is insoluble in water (solid ) known as precipitate

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Muskan Kumari 4 years, 2 months ago

Precipitation reaction is a type of double displacement reaction in which a substance is insoluble in water (solid ) known as precipitate.

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Sahil Srivastava 4 years, 2 months ago

Precipitation reaction is nothing but the reaction in which precipitate form in bottom of the beaker

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1.What is the drift speed of electrons through a conductor carrying current? 1. What is the speed of a current through a conductor?

Posted by Vandana Khare 4 years, 2 months ago

CBSE > Class 10 > Science

2 answers

Aditya Anand 4 years, 2 months ago

No, drift speed of electrons is around 10-4m/s, whereas speed ofcurrent is nearly equal to the speedof light in vacuum

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Prarthana Dehariya 4 years, 2 months ago

No, drift speed of electrons is around 10-4m/s, whereas speed ofcurrent is nearly equal to the speedof light in vacuum

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How washing soda is produced ? By step by step equation. And also explain it

Posted by Sweta Kumari 4 years, 2 months ago

CBSE > Class 10 > Science

1 answers

Anmol Preet 4 years, 2 months ago

???? 1 :- Limestone is heated to furnish carbon - dioxide and lime. CaCO3 (s) (by heat) ----> CaO (s) + CO2 (g). ???? 2 :- Carbon dioxide and ammonia gases are bubbled into a saturated solution of sodium chloride (NaCl) at 15°C. NaCl + NH3 + CO2 + H2O ---> NaHCO3 + NH4Cl Sodium Hydrocarbonate (NaHCO3) is sparingly soluble in water at 15°C and is filtered out. ???? 3 :- On heating, NaHCO3 gives sodium carbonate (Na2CO3). 2NaHCO3 (s) (by heat) ---> Na2CO3 (s) + CO2 (g) + H2O (g) Anhydrous sodium carbonate (Na2CO3) thus obtained is called soda ash. Sodium carbonate readily dissolves in water. The solution on evaporation below 32°C gives crystals of sodium carbonate, Decahydrate, i.e., Na2CO3.10H2O.

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How many water molecules present in gypsum ?

Posted by Sweta Kumari 4 years, 2 months ago

CBSE > Class 10 > Science

4 answers

Pranita Shete 4 years, 2 months ago

Gypsum contains 2 water molecules

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Armaan Armaan 4 years, 2 months ago

Half

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Aditya Anand 4 years, 2 months ago

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Ur Kumar Ranjan 4 years, 2 months ago

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Why do the ventricles have thick muscular walls then the atria ?

Posted by Avneet Kaur 4 years, 2 months ago

CBSE > Class 10 > Science

2 answers

Avneet Kaur 4 years, 2 months ago

Thanks

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Some Thing Special For You Tiwari 4 years, 2 months ago

Because in ventricles have higher pressure as compare to atria

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What is the function of blood in our body ?

Posted by Avneet Kaur 4 years, 2 months ago

CBSE > Class 10 > Science

3 answers

Pranita Shete 4 years, 2 months ago

Yes,it helps in transportation...means the materials flow along with the blood..

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Avneet Kaur 4 years, 2 months ago

Thanks

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Some Thing Special For You Tiwari 4 years, 2 months ago

Transportation , it transport mainly oxygen and many more

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Why transportation is required inside the living body !

Posted by Avneet Kaur 4 years, 2 months ago

CBSE > Class 10 > Science

2 answers

Avneet Kaur 4 years, 2 months ago

Thanks

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Kanav Dumra 4 years, 2 months ago

Transportation is very necessary for the assimilation and absorption of food / starch by each and every cell.

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How our heart pumps blood . Explain

Posted by Avneet Kaur 4 years, 2 months ago

CBSE > Class 10 > Science

2 answers

Avneet Kaur 4 years, 2 months ago

Thanks

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Mahrosh Khan 4 years, 2 months ago

The primary responsibility of the heart is to pump blood throughout the circulatory system. As the center of the circulatory system, the heart is an essential organ for maintaining the overall functioning of the body. The cardiovascular system consists of many veins and blood vessels which ensure that all parts of the body are provided with an adequate amount of oxygen and nutrients to function efficiently. Without a sufficient supply of oxygen, any bodily function would fail, causing organ damage or organ death. Components of the heart Fully understanding the heart’s vital function in the body entails the need to first understand its anatomy. As a busy and hardworking organ, the heart needs to closely monitor all of its components to ensure proper functioning. Even a minor cardiac dysfunction may result in significant functional challenges in the total body function of an affected individual. Located at the center of the chest and in the thoracic cavity, the heart can be divided into four parts that are otherwise known as chambers, each of which contains several valves. Two of these chambers, which are called atria, are located in the upper portion of the heart and receive oxygen-free blood. The valves that separate these chambers are called atrioventricular valves, which are composed of the tricuspid valve on the left and the mitral valve on the right. Image Credit: Olga Bolbot / Shutterstock.com Meanwhile, ventricles, which are the chambers found in the lower portion of the heart, pump oxygen-enriched blood into the body. Similar to the atria, the ventricular chambers are also separated by valves called semilunar valves. These valves may be further divided into the pulmonary and aortic valves. The heart is also composed of a protective layer that has three parts, which include the outer layer known as the epicardium, the middle layer known as the myocardium, and the innermost layer known as the endocardium. Both the outer and inner layers of the heart are thin; whereas the middle layer, makes up most of the heart and is comrpised of cardiac muscle fibers.

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What is the difference between displacement and double displacement reaction

Posted by Sneha Rawat 4 years, 2 months ago

CBSE > Class 10 > Science

2 answers

Mishti Roy 4 years, 2 months ago

The chemical reaction in which more reactive element displace a less reactive element from a compound are known as displacement.. The chemical reaction in which compounds react to form two different compounds by mutual exchanges of ions are called double displacement reaction..

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Vaidik Goel 4 years, 2 months ago

Displacement reaction is a chemical reaction in which displacement of a metal from its solution takes place by the other metal that is more reactive than the metal being displaced. Double displacement reaction is a chemical reaction in which exchange of ions between both the reactants takes place.

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Resources and development and fram cross word puzzle

Posted by Dev Shukla 4 years, 2 months ago

CBSE > Class 10 > Science

1 answers

Oav Papadahandi 4 years, 2 months ago

(ii) minerals (iv) laterite (I) resource (Vi) alluvial (iii) black ( v) forest

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An object 3.0cm long is placed at a distance of 12cm, infront of a concave mirror of radius of curvature 8.0cm normally to principal axis . Find the position size and nature of the image

Posted by Jai Jaiswal 4 years, 2 months ago

CBSE > Class 10 > Science

1 answers

Ritik Varshney 4 years, 2 months ago

Focal length=-4 cm U=-12 cm Mirror formula, 1/f=1/u+1/v 1/-4=1/-12+1/v 1/-4+1/12=1/v -3+1/12=1/v -2/12=1/v -1/6=1/v -6cm=V Nature-Real and inverted Position of image between focus and pole M=-v/u M=-(-6)/-12 M=-6/12 M=-1/2 M=h'/h -1/2=h'/3 -3/2cm=h'.

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What type of reaction is represented by the digestion of food is our body?

Posted by Kushal Mehra 10A 4 years, 2 months ago

CBSE > Class 10 > Science

1 answers

D.I.S 4 years, 2 months ago

Decomposition reaction, in which complex food material is broken down into simpler substances.

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What do you understand by term covid-19 ? Draw it's structure and explain it's magnesium. How much countagious is the corona virus . Explain by taking into account . a)- signs of infection b)- transmission c)- incubation period d)- source or vector e)- how does sanitizer and soaps kill the virus .

Posted by Aakanksha Gupta 4 years, 2 months ago

CBSE > Class 10 > Science

1 answers

Sia ? 4 years, 2 months ago

COVID-19 is the name given by the World Health Organization (WHO) on February 11, 2020 for the disease caused by the novel coronavirus SARS-CoV2. It started in Wuhan, China in late 2019 and has since spread worldwide. COVID-19 is an acronym that stands for coronavirus disease of 2019.

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Seerate-Rasool-e-Akram, kiya tum iske bare mai jante ho ye indo Islamic culture se related hai mujhe iske bare mai sare information chaye kiya tum bata sakte ho ki, ye koi esa app ji mujhe inke bare mai full information de de , I want it unrgent?

Posted by Anshika Sharma 4 years, 2 months ago

CBSE > Class 10 > Science

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What is enzyme ? Class 10

Posted by Sania Gulafshan 4 years, 2 months ago

CBSE > Class 10 > Science

1 answers

Ritik Varshney 4 years, 2 months ago

Enzymes are bio catalysts that help in breakdown of substance in body

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2H2+O2=2H2O chemical name

Posted by Mishti Roy 4 years, 2 months ago

CBSE > Class 10 > Science

5 answers

Hina Yasmeen 4 years, 2 months ago

Element name is deuterium . Compound name is water.

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Sweta Kumari 4 years, 2 months ago

Combination reaction

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Namrata Pasi 4 years, 2 months ago

Water

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Suryansh. Dubey 4 years, 2 months ago

Water

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Anshika Sharma 4 years, 2 months ago

Combination equation

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3Fe+4H2O=Fe3O4+4H2 what is chemical equation name and which types of reaction

Posted by Mishti Roy 4 years, 2 months ago

CBSE > Class 10 > Science

2 answers

Anshika Sharma 4 years, 2 months ago

Redox, and displacement reaction, when iron react with water it givers ferric oxide

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Saroj Kumar 4 years, 2 months ago

Redox reaction

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Please explain resitivity

Posted by Rinad Khan 4 years, 2 months ago

CBSE > Class 10 > Science

2 answers

Suryansh. Dubey 4 years, 2 months ago

Ability of a material of a conductor to oppose the current

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Anshika Sharma 4 years, 2 months ago

restivity material that measures how strongly it resists electric current

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Ye ek physics ka question hai. [standard 10 light reflection and refraction] What is the difference between concave and convex mirror ------(5 marks)

Posted by Hdm . 4 years, 2 months ago

CBSE > Class 10 > Science

3 answers

Sia ? 4 years, 2 months ago

The virtual image formed by a concave mirror is larger than the size of the object, whereas the virtual image formed by a convex mirror is smaller than the size of the object.

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Sweta Kumari 4 years, 2 months ago

Concave mirror is also know as converging mirror ,and convex mirror is also know as diverging mirror.And concave mirror forms real and inverted as well as virtual and erect image and convex mirror forms always virtual and erect image .

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Abhishek Poswal Poswal 4 years, 2 months ago

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What happens if we left milk at room temperature during summers??

Posted by Suruchi Singh 4 years, 2 months ago

CBSE > Class 10 > Science