Asked/Added Questions From NCERT: Chemistry

Solid id one of the four fundamental states of matter (the other being liquid, gas and plasma). The atoms in a solid are closed packed together and contain the least amount of kinetic energy. A solid is characterized by structural rigidity and resistance to a force applied to the surface.

-Answered by Master Purushottam On 31 May 2020:12:14:13 AM

 The fourth state of matter is Plasma , Plasma is a hot ionized gas consisting of approximately equal numbers of positively charged ionsand negatively charged electrons. The fifth state of matter is BEC(Bose-Einstein Consensate). 

-Answered by Master Purushottam On 31 May 2020:12:18:00 AM

 The particles of matter are very, very small. The particles of matter have space between them. The particles of matter are constantly moving. The particles of matter attracted each other.

-Answered by Master Purushottam On 31 May 2020:12:20:50 AM

Intermixing of particles of different matter in spaces between particles is known as Diffusion.  

-Answered by Master Purushottam On 31 May 2020:12:22:55 AM

 The erratic random movement of microscope particles in a fluid, as a result of continuous bombardment From molecules of the surrounding medium.

-Answered by Master Purushottam On 31 May 2020:12:24:35 AM

 This law was proposed by Dalton in 1803. According to this law if two elements can combine to form more than one compounds, the masses of one element that combined with a fixed mass of the other element are in the ratio of small whole numbers.

-Answered by Himanshi Verma On 27 May 2020:03:17:53 PM

 The movement of atoms or morecules for an area of higher concentration to an area of lower Concentration. Some substances like carbon-di-oxide  or oxygen can move across cell membrane from region of high concentration to a region where concentration is low this process is known as diffusion.

-Answered by Nishant Verma On 27 May 2020:09:59:40 AM

 Cohesive ( from Latin cohaesio  "cling or unit"). Or cohesive attraction or cohesive force is the action or property of like molecules to sticking together, being a mutually attrative.

-Answered by Nishant Verma On 27 May 2020:09:40:45 AM

1. How small are the particles of matter.
2. The particles of matter have space between them .
3. The particles of matter attract each other.
4. The particles of matter are in continuous motion.

-Answered by Aman Senapati On 27 May 2020:09:27:30 AM

 A drop of water has about 1,00,00,00,00,00,00,00,00,00,000 particles(molecules).

-Answered by Aman Senapati On 27 May 2020:09:19:17 AM

 The five elements are:-

1. Akasha(sky)
2. Vayu(air)
3. Kshiti(earth)
4. Jal(water)
5. Pawak(fire)

-Answered by Aman Senapati On 26 May 2020:07:43:31 AM

 An Atom is an smallest component of an elements,characterized by a sharing of the chemical properties of the element and a nucleus with neutrons,protons and electrons.

-Answered by Aman Senapati On 26 May 2020:07:46:33 AM

1.  Earth 
2.  Air 
3.  Water
4.  Fire

-Answered by Aman Senapati On 26 May 2020:07:51:13 AM

 Greek philosophers Empedocles.

-Answered by Aman Senapati On 26 May 2020:07:52:41 AM

 The following are not considered matter:-

1. Types of energy like heat,light etc.
2. Sensation
3. Emotions:love,hatred,affection,friendship,etc.
4. Time

-Answered by Aman Senapati On 26 May 2020:07:56:41 AM

 Mass is the amount of matter present in an objects.

-Answered by Aman Senapati On 25 May 2020:07:28:04 PM

-Answered by Aman Senapati On 25 May 2020:07:24:14 PM

-Answered by Suraj Kumar On 10 November 2019:03:52:38 PM

 Uttarakhand

-Answered by priyanshu kumar On 03 October 2019:12:34:18 PM

-Answered by priyanshu kumar On 03 October 2019:12:34:52 PM

 Selenium.

-Answered by priyanshu kumar On 03 October 2019:12:35:01 PM

-Answered by priyanshu kumar On 20 October 2019:09:51:45 AM

-Answered by Harshita Rathore On 02 September 2019:01:51:03 PM

-Answered by Shivang Gupta On 25 August 2019:02:45:12 PM

 Trivantepuram.

-Answered by Akki chauhan On 24 August 2019:02:46:41 PM

 Archery.

-Answered by Akki chauhan On 24 August 2019:11:11:52 AM

 Berlin.

-Answered by priyanshu kumar On 10 November 2019:03:26:19 PM

It uses are:-

1. Its used for supporting fractured bones.

2. It is used for making sufaces smooth.

3. It is used in many material and making in toys.

4. It is used for making statues.

-Answered by Himanshi Verma On 21 August 2019:05:15:13 PM

 The formula of washing soda is Na₂Co₃.10H₂o. Recrystallisation of sodium carbonate gives  washing soda. It is a basic salt.

Its uses are:-

1. It is used in glass, soap and paper industries.

2. It is used in manufacture of Borax.

3. It is used as cleaning agent for domestic purpose.

4. It is used for removing permanent hardness of water.

-Answered by Himanshi Verma On 21 August 2019:04:56:37 PM

 When electricity is passed through an aqueous solution of sodium chloride it decomposes to form sodium hydroxide. The process is called the chlor-alkali alkali process because of the products formed: chlor for chlorine and alkali for Sodium Hydroxide. Chlorine gas is given off at the anode and hydrogen gas at the cathode.

-Answered by Himanshi Verma On 21 August 2019:04:54:18 PM

 Methanoic acid is present in ant sting.

-Answered by Himanshi Verma On 21 August 2019:04:52:47 PM

 The compunds formed by the transfer of electrons from a metal to a non- metal are called ionic compounds or electrovalent compounds.

-Answered by Himanshi Verma On 21 August 2019:04:50:17 PM

 Carbon has 4 electrons in its outer most orbits and in order to attain the noble gas configuration it should either lose the 4 electrons and gain helium gas configuration or gain 4 electrons to obtain neon gas configuration

-Answered by Himanshi Verma On 21 August 2019:04:48:24 PM

 1. Position of isotopes could not be explained.

2. No fixed position for hydrogen.

3. Wrong order of atomic masses of some elements could not be explained.

-Answered by Himanshi Verma On 21 August 2019:04:44:39 PM

 The carbonate ores are changed into oxides by heating strongly in limited air. This process is called Calcination.

-Answered by Himanshi Verma On 21 August 2019:04:32:51 PM

 1. No, fixed position can be given to hydrogen in the Mendeleev's classification.

2. There are no any place for isotopes.

3. It was not possible to predict how many elements could be discovered between two elements.  

-Answered by Himanshi Verma On 20 August 2019:07:44:51 PM

 Silicon dioxide.

-Answered by Himanshi Verma On 19 August 2019:10:56:21 PM

 Father of Antoine Lavoisier is "Jean Antoinie Lavoisier".

-Answered by Himanshi Verma On 01 July 2019:07:27:27 PM

 vitamin C

-Answered by Akki chauhan On 05 February 2019:09:57:59 AM

 Toxin

-Answered by Akki chauhan On 05 February 2019:09:57:55 AM

 Sulphur

-Answered by Akki chauhan On 05 February 2019:09:57:50 AM

-Answered by Master Purushottam On 24 August 2019:12:02:19 AM

-Answered by Master Purushottam On 23 August 2019:11:50:20 PM