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Write the balance equation for the following reactions Give reasons for the following reactions? i. Hydrogen + Chlorine → Hydrogen chloride ii. Barium chloride + Aluminium sulphate →Barium sulphate + Aluminium chloride iii. Sodium + water → Sodium hydroxide + water Ans. The chemical equations are as follows- i. H2 + Cl2 2HCl. ii. 3BaCl2 + Al2(SO4)3 3BaSO4 + 2AlCl3. iii. 2Na + 2H2O 2NaOH + H2.

Posted by Rishabh Pawar 5 years, 1 month ago

CBSE > Class 10 > Science

0 answers

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Define Isobars and istopes

Posted by Vikrant Rajput 5 years, 1 month ago

CBSE > Class 10 > Science

2 answers

Yogita Ingle 5 years, 1 month ago

Isobar is that element which differs in the chemical property but has the same physical property. So, we can say that isobars are those elements which have a different atomic number but the same mass number.

Example: ⁴⁰S, ⁴⁰Ar, ⁴⁰Ca. ⁴⁰Cl, and ⁴⁰K.

Atoms that have an equal number of protons but a different number of neutrons and protons are called isotopes.

Example: ¹⁶O, ¹⁷O, and ¹⁸O.

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Saurabh Singh 5 years, 1 month ago

Isobar means the mass no. Is same

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What is relative refractive index ?

Posted by Arvind Yadav 5 years, 1 month ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 5 years, 1 month ago

The ratio of the speed of light in a vacuum to the speed of monochromatic light in the substance of interest. Also called the absolute index of refraction it is commonly called the refractive index or index of refraction. However, those two terms are also sometimes applied without warning to the ration found when the ray emerges into the air instead of a vacuum. That ratio should be called a relative refractive index.

The ratio of the first value to the second one is about the relative refractive index of the glass. In the case of a concave surface, beams originally propagating along the main optical axis will be refracted in such a way that they will never intersect.

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Question answered of heridty and evolution ch in biology

Posted by Aditi Sharma 5 years, 1 month ago

CBSE > Class 10 > Science

0 answers

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Textual question answer of heridty and evolution ch

Posted by Aditi Sharma 5 years, 1 month ago

CBSE > Class 10 > Science

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Question answered of heridty and evolution

Posted by Aditi Sharma 5 years, 1 month ago

CBSE > Class 10 > Science

2 answers

Jagrati Sharma?? 5 years, 1 month ago

It is given in this app...

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Vikrant Rajput 5 years, 1 month ago

Okk Ask the particular question

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What is meant by thermite reaction???

Posted by Kumari Shalini 5 years, 1 month ago

CBSE > Class 10 > Science

2 answers

Yogita Ingle 5 years, 1 month ago

A thermite reaction is basically iron oxide (rust) reacting with aluminum to produce molten iron. The products are aluminium oxide, elemental iron, and a large amount of heat. The reactants are commonly or thermite mixture is aluminum powder and iron oxide (rust) powder. When the mixture is heated, it starts reacting as the aluminum is more reactive than the iron and aluminium forms stronger and stable bonds with oxygen than iron.

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Chhaya Gangwar 5 years, 1 month ago

The thermite reaction is an exothermic reaction between the metal and metal oxide.

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What actually happens in electric current

Posted by Rajkumari Gupta 5 years, 1 month ago

CBSE > Class 10 > Science

3 answers

Rishabh Pawar 5 years, 1 month ago

We are familiar with air current and water current. We know that flowingwater constitute water current in rivers. Similarly, if the electric chargeflows through a conductor (for example, through a metallic wire), wesay that there is an electric current in the conductor. In a torch, weknow that the cells (or a battery, when placed in proper order) provideflow of charges or an electric current through the torch bulb to glow. Wehave also seen that the torch gives light only when its switch is on. Whatdoes a switch do? A switch makes a conducting link between the cell andthe bulb. A continuous and closed path of an electric current is called anelectric circuit. Now, if the circuit is broken anywhere (or the switch of thetorch is turned off), the current stops flowing and the bulb does not glow.How do we express electric current? Electric current is expressed bythe amount of charge flowing through a particular area in unit time. Inother words, it is the rate of flow of electric charges. In circuits usingmetallic wires, electrons constitute the flow of charges. However, electronswere not known at the time when the phenomenon of electricity was firstobserved. So, electric current was considered to be the flow of positivecharges and the direction of flow of positive charges was taken to be thedirection of electric current. Conventionally, in an electric circuit thedirection of electric current is taken as opposite to the direction of theflow of electrons, which are negative charges.

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Aparna Kumari 5 years, 1 month ago

The free electrons flow inside it

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Yogita Ingle 5 years, 1 month ago

Electric Current: The flow of electric charge is known as electric current. Electric current is carried by moving electrons through a conductor. By convention, electric current flows in opposite direction to the movement of electrons.

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Write the different between ammeter and voltmeter

Posted by Muskan Kumari 5 years, 1 month ago

CBSE > Class 10 > Science

2 answers

Yogita Ingle 5 years, 1 month ago

Ammeter	Voltmeter
It is used to measure current	It is used to measure voltage across two points
Resistance is low	Resistance is high
It is connected in series with the circuit and its accuracy is more	It is connected in parallel with the circuit and its accuracy is less
Changing of range is not possible	Changing of range is possible
For ideal ammeter, the value of resistance is 0	For ideal voltmeter, the value of resistance is approximately infinity
It is denoted by a symbol A	It is denoted by a symbol V

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Yadu Raj 5 years, 1 month ago

Ammeter is a device whichbmeasures the amount of electric current in a circuit...Voltmeter measures the voltage through a given section....

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Write the different between ammeter and galvanometer

Posted by Muskan Kumari 5 years, 1 month ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 5 years, 1 month ago

Ammeter	Galvanometer
It is a device used to determine the magnitude of current flowing in a circuit.	It is a device used to detect the strength and direction of small current present in the circuit
It works with or without the presence of the magnetic field.	It works due to the presence of the magnetic field
It measures both the Alternate and Direct current	It measures only the direct current
It is less sensitive	It is more sensitive
It is more accurate	It is less accurate
It could be a mechanical or electronic device	It is a mechanical device
It is used in an electrical circuit	It is used in bridge and potentiometer

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Heridty and evolution ch question answered

Posted by Aditi Sharma 5 years, 1 month ago

CBSE > Class 10 > Science

0 answers

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What is the difference between total resistance and equivalent resistance?

Posted by King Adithya H M... 5 years, 1 month ago

CBSE > Class 10 > Science

2 answers

Knowledge Singh 5 years, 1 month ago

There are no major difference between total resistance and equivalent resistance

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Yogita Ingle 5 years, 1 month ago

The equivalent resistance is where the total resistance connected either in parallel or in series. Electrical resistance shows that how much energy will be required when we move the charges i.e. current through the circuit. If we need lots of energy, then the resistance necessary should also be high. The equivalent resistance of a network is the single resistor which can replace the entire network in such a way that for a certain applied voltage as V we will get the same current as I.

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What is equivalent resistance between A and B?

Posted by King Adithya H M... 5 years, 1 month ago

CBSE > Class 10 > Science

1 answers

Shikha Gupta 5 years, 1 month ago

Please drop the image of question here or write the value of given content...then you will get the correct answer.?

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What are the 18 isomers of octane?

Posted by King Adithya H M... 5 years, 1 month ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 5 years, 1 month ago

Octane
2-Methylheptane
3-Methylheptane
4-Methylheptane
2,2-Dimethylhexane
2,3-Dimethylhexane
2,4-Dimethylhexane
2,5-Dimethylhexane
3,3-Dimethylhexane

3,4-Dimethylhexane
3-Ethylhexane
2,2,3-Trimethylpentane
2,2,4-Trimethylpentane
2,3,3-Trimethylpentane
2,3,4-Trimethylpentane
2-Methyl-3-ethylpentane
3-Methyl-3-ethylpentane
Tetramethylbutane

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What are the 9 isomers of heptane?

Posted by King Adithya H M... 5 years, 1 month ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 5 years, 1 month ago

Heptane
2-Methylhexane
3-Methylhexane
2,2-Dimethylpentane
2,3-Dimethylpentane
2,4-Dimethylpentane
3,3-Dimethylpentane
3-Ethylpentane
2,2,3-Trimethylbutane

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What are the four characteristics of isomers?

Posted by King Adithya H M... 5 years, 1 month ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 5 years, 1 month ago

The existence of two or more different organic compounds having same molecular formula but different structure is called isomerism.
Characteristics :
1. they possess different physical properties.
2. they have different chemical property
3.they show similar properties when they contain same functional group.
4. They have same molecular formula but different structural formula.
5. 2 isomers have different Boiling point
6. They have same atomic weight and same number of atoms

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Metal compound A react with dilute HCL to produce Effervescen. The gas evolved extinguisher a burning candle. Write a balanced chemical equation for the reaction if one of the compound formed isCaCL2

Posted by Sneha Kumari 5 years, 1 month ago

CBSE > Class 10 > Science

2 answers

Harsh Gupta 5 years, 1 month ago

Carbon dioxide

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King Adithya H M... 5 years, 1 month ago

The gas evolved extinguishes a burning candle. Write a balanced chemical equation for the reaction if one of the compounds formed is calcium chloride. The gas thus formed is an effervescent carbon dioxide gas when calcium carbonate reacts with hydrochloric acid.

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ANSWER

ANY COMPOUNDS MODEL PICTURE

Posted by Shaik Amaan 5 years, 1 month ago

CBSE > Class 10 > Science

0 answers

ANSWER

Explain isomerism. State any four characteristics of isomers.

Posted by Jagrati Sharma?? 5 years, 1 month ago

CBSE > Class 10 > Science

5 answers

Jagrati Sharma?? 5 years, 1 month ago

Thanks for answering me .... Or sumaila mujhe apka name pta nhi tha ....(hii) app kha se belong krti ho

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King Adithya H M... 5 years, 1 month ago

(i) They possess same molecular formula but different structural formula. (ii) In Isomerism, the two or more different compounds can be represented with the same molecular formula. (iv) The phenomena of Isomerism occurs only when the hydrocarbons contains four or more than 4 carbon atoms.

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Itachi Uchiha ? 5 years, 1 month ago

Am I rit????

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Itachi Uchiha ? 5 years, 1 month ago

Jagrati my name is sumaila..not (samila or sumila) and plzz yrr koi us Ashu ko chup karai vo to peeche ho pad gyi...??????

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Itachi Uchiha ? 5 years, 1 month ago

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work done to move 1 coulomb charge from one point to another point on a charged conductor having potential 10 volt is

Posted by Mansi Singh 5 years, 1 month ago

CBSE > Class 10 > Science

2 answers

King Adithya H M... 5 years, 1 month ago

1 joule

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Jagrati Sharma?? 5 years, 1 month ago

Answer is... Work done = V × C = 10 × 1 = 10 joule.... Is am right..

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20 solved examples of balance equation

Posted by Pooja Kumari 5 years, 1 month ago

CBSE > Class 10 > Science

1 answers

Lohitha Pilla 5 years, 1 month ago

2H2+O2→2H2O H_2+Cl_2\rightarrow 2HClH2+Cl2→2HCl PbSO_4+Zn\rightarrow ZnSO_4+PbPbSO4+Zn→ZnSO4+Pb 4B+3O_2\rightarrow 2B_2O_34B+3O2→2B2O3 2Al+6HCl\rightarrow 2AlCl_3+3H_22Al+6HCl→2AlCl3+3H2 N_2+O_2\rightarrow 2NON2+O2→2NO P_4+3O_2\rightarrow P_4O_6P4+3O2→P4O6 4NH_3+5O_2\rightarrow 6H_2O+4NO4NH3+5O2→6H2O+4NO Mg+2HNO_3\rightarrow Mg(NO_3)_2+H_2Mg+2HNO3→Mg(NO3)2+H2 Hg+S\rightarrow HgSHg+S→HgS CaO+SO_2\rightarrow CaSO_3CaO+SO2→CaSO3 MgO+H_2SO_4\rightarrow MgSO_4+H_2OMgO+H2SO4→MgSO4+H2O Zn+2H_2O\rightarrow Zn(OH)_2+H_2Zn+2H2O→Zn(OH)2+H2 MgSO_4+Na_2CO_3\rightarrow MgCO_3+Na_2SO_4MgSO4+Na2CO3→MgCO3+Na2SO4 Cl_2+2F_2\rightarrow 2ClF_3Cl2+2F2→2ClF3 Xe+3F_2\rightarrow XeF_6Xe+3F2→XeF6 Al_2O_3.2H_2O\rightarrow Al_2O_3+2H_2OAl2O3.2H2O→Al2O3+2H2O 2PbS+3O_2\rightarrow 2PbO+2SO_22PbS+3O2→2PbO+2SO2 2HgO\rightarrow 2Hg+O_22HgO→2Hg+O2 Cr_2O_3+2Al\rightarrow Al_2O_3+2CrCr2O3+2Al→Al2O3+2Cr

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Difference between External fertilization and internal fertilaization

Posted by Md Danish Siddiqui 5 years, 1 month ago

CBSE > Class 10 > Science

0 answers

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Can l get Science sample question paper 2019 with solutions..plz someone help me out with this

Posted by Leema Reddy 5 years, 1 month ago

CBSE > Class 10 > Science

3 answers

Jagrati Sharma?? 5 years, 1 month ago

It is available in this app...(last year paper also)..

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Sumesh ☺️☺️☺️ 5 years, 1 month ago

You can purchase sample paper

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Mamta ... 5 years, 1 month ago

In this (my CBSE guide app )u will get all last year's sample papers with solutions.

3Thank You

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What are the primary structural and functional differences between arteries and veins quizlet?

Posted by King Adithya H M... 5 years, 1 month ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 5 years, 1 month ago

ARTERIES	VEINS
Functions
Involved in carrying pure, oxygenated blood and nutrient-rich blood.	Involved in carrying impure, deoxygenated blood
Walls
Consists of three distinct layers, which are rigid, thicker and highly muscular.	Consists of three distinct layers, which are thin and collapsible.
Position
Located deep within the body.	Peripherally located closer to the skin.

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What are 3 differences between arteries and veins?

Posted by King Adithya H M... 5 years, 1 month ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 5 years, 1 month ago

ARTERIES	VEINS
Functions
Involved in carrying pure, oxygenated blood and nutrient-rich blood.	Involved in carrying impure, deoxygenated blood
Walls
Consists of three distinct layers, which are rigid, thicker and highly muscular.	Consists of three distinct layers, which are thin and collapsible.
Position
Located deep within the body.	Peripherally located closer to the skin.

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ANSWER

What are 3 differences between arteries and veins?

Posted by King Adithya H M... 5 years, 1 month ago

CBSE > Class 10 > Science

1 answers

Meghna Thapar 5 years, 1 month ago

Arteries	Vein
They carry oxygenated blood (blood that carries a large amount of oxygen) rich in nutrients.	They carry deoxygenated blood (blood that carries a large amount of carbon dioxide) rich in waste materials.
They carry blood from the heart to the different parts of the body.	They carry blood from the different parts of the body to the heart.
They have thick muscular walls and narrower lumen.	They have thinner walls and lumen is not narrow.

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Where does the food get digested in an amoeba?

Posted by King Adithya H M... 5 years, 1 month ago

CBSE > Class 10 > Science

2 answers

Yogita Ingle 5 years, 1 month ago

Amoeba shows the holozoic nutrition. It means that the Amoeba consumes the whole food through the endocytosis and digests the food inside the cell within the food vacuole. The digestion process can be describes as :

1. Ingestion- Amoeba moves towards the food by making pseudopodia. The pseudopodia surround the food particle and fuse to form the food vacuole, which is then taken inside the cytoplasm.

2. Digestion- The food vacuole is combined with lysosomes that contain the hydrolytic enzymes. These enzymes perform the breakdown of food particles.

3. Absorption- The digested food is then absorbed directly into the cytoplasm from where it will be distributed to the different organelles.

4. Assimilation- The absorbed food is used for the generation of energy. The excess amount is stored in the form of glycogen and lipids in the cytoplasm.

5. Excretion- The undigested food in the food vacuole is excreted out of the cell as the food vacuole fuses with the cell membrane and perform exocytosis.

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Mamta ... 5 years, 1 month ago

food vacuole

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How feeding and digestion goes in amoeba?

Posted by King Adithya H M... 5 years, 1 month ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 5 years, 1 month ago

1. Ingestion- Amoeba moves towards the food by making pseudopodia. The pseudopodia surround the food particle and fuse to form the food vacuole, which is then taken inside the cytoplasm.

2. Digestion- The food vacuole is combined with lysosomes that contain the hydrolytic enzymes. These enzymes perform the breakdown of food particles.

3. Absorption- The digested food is then absorbed directly into the cytoplasm from where it will be distributed to the different organelles.

4. Assimilation- The absorbed food is used for the generation of energy. The excess amount is stored in the form of glycogen and lipids in the cytoplasm.

5. Excretion- The undigested food in the food vacuole is excreted out of the cell as the food vacuole fuses with the cell membrane and perform exocytosis.

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How is food digested in amoeba?

Posted by King Adithya H M... 5 years, 1 month ago

CBSE > Class 10 > Science

1 answers

Mamta ... 5 years, 1 month ago

Digestion: The food is digested in the food vacuole with the help of enzymes. Absorption: It is then absorbed in the cytoplasm of the Amoeba by diffusion. Assimilation: The absorbed food provides energy and a part of nutrition is used for growth. Egestion: The undigested and the waste food particles are thrown out.

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Mention the purpose of blackening the interior of a solar cooker.

Posted by King Adithya H M... 5 years, 1 month ago

CBSE > Class 10 > Science

2 answers

Mamta ... 5 years, 1 month ago

The purpose of blackening the interior of a solar cooker is that the black surface absorbs more heat radiations of incident solar energy (about 98%) as compare to white or other light coloured surface.

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Arpit Kumar 5 years, 1 month ago

To absorb sunlight

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