Ask questions, doubts, problems and we will help you..
Ask questions which are clear, concise and easy to understand.
Ask Question
CBSE, JEE, NEET, CUET
Question Bank, Mock Tests, Exam Papers
NCERT Solutions, Sample Papers, Notes, Videos
Posted by Sakshi Yadav 5 years, 3 months ago (9754665)
- 0 answers
Posted by Monica Suresh 5 years, 3 months ago (9553554)
- 2 answers
Gaurav Seth 5 years, 3 months ago (2898529)
Explanation:
Charge of each nucleus = 29e
∴ Net charge 2 gm sphere = (29e) × (2 × 1022) = 5.8 × 1023e c.
∴ No of electrons on sphere = 5.8 × 1023
∴ No of electrons removed to give 2μc charge
= (q/e)
= [(2 × 10–6)/(1.6 × 10–19)]
= 1.25 × 1013
∴ fraction of electrons removed = [(1.25 × 1013)/(5.8 × 1023)]
= 2.16 × 10–11
Gaurav Seth 5 years, 3 months ago (2898529)
A copper sphere of mass 2 g contains nearly 2 x 1022 atoms. The charge on the nucleus of each atom is 29 e. What fraction of the electrons must be removed from the sphere to give it a charge of +2 μC?
<hr />Total number of electrons in the sphere = 29 x 2 x 1022
Posted by Subhas Jain 5 years, 3 months ago (5748981)
- 0 answers
Posted by Raj Raj 5 years, 3 months ago (8671917)
- 1 answers
Aarju Singh 5 years, 3 months ago (9373395)
Posted by Poonam Patel 5 years, 3 months ago (9799387)
- 2 answers
Gaurav Seth 5 years, 3 months ago (2898529)
the acid is usually manufactured using a method known as the contact process. Earlier, in this process, a chemical element known as platinum was first used as a catalyst. Later, an inorganic compound known as vanadium oxide replaced platinum due to cost constraints.
In any case, today we will be looking at the contact process in detail.
Contact process for manufacturing of sulphuric acid:
Steps involved in the manufacturing of sulphuric acid are as stated below:
- Preparation of sulphur dioxide.
- Conversion of sulphur dioxide into sulphur trioxide.
- Conversion of sulphur trioxide formed into concentrated H2SO4.
Posted by Raj Raj 5 years, 3 months ago (8671917)
- 1 answers
Gaurav Seth 5 years, 3 months ago (2898529)
India's role in Non-Aligned Movement was significant for reasons mentioned below :(i) First Prime Minister of India, Jawaharlal Nehru was one of the five founders of NAM.
(ii) As a leader of NAM, India stayed away from the two camps. Not only this, India asked the newly decolonised countries not to become part Of those alliances.
(iii) It was a policy not of ‘being neutral’ but of active intervention too. India intervened in the Korea war. India tried to involve other members of the non-aligned group with her. India repeatedly tried to activate those regional and international organisations which were not part of the alliances led by the US and USSR.
India was criticised for signing the Treaty of Friendship in August 1971 with the USSR as virtually joining the Soviet alliance system. But in fact India needed diplomatic and possibly military support during the Bangladesh crisis. Moreover, it did not stop India from having good relations with USA and other countries.
Posted by Raj Raj 5 years, 3 months ago (8671917)
- 0 answers
Posted by Noorain Ahmed 5 years, 3 months ago (8555728)
- 1 answers
Gaurav Seth 5 years, 3 months ago (2898529)
Sir:
I am writing this letter to bring your attention to the growing nuisance of auto drivers overcharging in our area. We live in a remote corner from town and the auto drivers always ask for a return fare. I have also noticed that a lot of times the fare from my office to home is different even though the time taken/traffic is almost the same. I need you to raise this concern in your newspaper and also have more traffic inspectors in our area to monitor these auto drivers and have them fined in case they over charge.
thanks you
Yours truly,
Posted by Dgf Chd 5 years, 3 months ago (4635669)
- 1 answers
Tanya ?? 5 years, 3 months ago (9516882)
Posted by Kirti Singh 5 years, 3 months ago (9242494)
- 2 answers
Gaurav Seth 5 years, 3 months ago (2898529)
(i) Defection in politics means moving of a person from one party to another party for some personal benefit. It means changing party allegiance from the party on which a person got elected to a different party..
(ii) It happens when a legislature, after having been elected from a particular party leaves it and joins in other party.
(iii) The Constitution was amended to prevent elected MLA’s and MP’s from changing parties. Now the law says that if any MLA and MP changes parties, he or she will lose seat in the legislature.
(iv) The new law has brought defection down and has made dissent even more difficult.
Posted by Deepika Malpani 5 years, 3 months ago (9700461)
- 0 answers
Posted by Priyanka Sharma 5 years, 3 months ago (9873495)
- 1 answers
D.R.K Mishra 5 years, 3 months ago (8757032)
Posted by Dgf Chd 5 years, 3 months ago (4635669)
- 1 answers
Posted by ᵐꜞᔆᔆ᭄ Qᴜᴇᴇɴ✿࿐꧂ : ꨄ︎•, 5 years, 1 month ago (2894528)
- 4 answers
Posted by Dgf Chd 4 years, 8 months ago (4635669)
- 1 answers
Sia ? 4 years, 8 months ago (6945213)
a chemical reaction also occurs when ammonia dissolves in water. In aqueous solution, ammonia acts as a base, acquiring hydrogen ions from H2O to yield ammonium and hydroxide ions. In contrast, the ammonium ion acts as a weak acid in aqueous solution because it dissociates to form hydrogen ion and ammonia.
Posted by Priyanka Sharma 5 years, 3 months ago (9873495)
- 1 answers
Gaurav Seth 5 years, 3 months ago (2898529)
A n s w e r
Combustion of Liquified Petroleum Gas (LPG) is a chemical change because, after its combustion, the new substance formed changes chemically and cannot be turned back into LPG.
Posted by Prince Sharma 5 years, 3 months ago (9210726)
- 1 answers
Rudranshu Mishra 5 years, 3 months ago (1938086)
Posted by Dgf Chd 5 years, 3 months ago (4635669)
- 2 answers
Gaurav Seth 5 years, 3 months ago (2898529)
A substance which increases the speed of a reaction without being consumed in the reaction is called a catalyst. The phenomenon of increasing the rate of reaction by the use of catalyst is called catalysis. Living cells contain thousands of different kinda of proteins called enzymes which act as catalysts.
Posted by Dgf Chd 5 years, 3 months ago (4635669)
- 1 answers
Gaurav Seth 5 years, 3 months ago (2898529)
Urea is a nitrogenous compound formed in the liver. It has a chemical formula of CH4N2O. It is also known as Carbamide or Ureophil. This compound is the final end product of protein metabolism. It is a waste product and has no physiological function. It dissolves in blood and kidney excretes it in urine. This organic compound has two NH2 groups connected by a functional group carbonyl. Urea dissolves in water and is non-toxic. It is colourless and has no smell. It is widely used as an important raw material in industries and commonly used in fertilizers.
Posted by P Singh . 5 years, 3 months ago (9781621)
- 2 answers
P Singh . 5 years, 3 months ago (9781621)
Posted by Dgf Chd 5 years, 3 months ago (4635669)
- 0 answers
Posted by Dgf Chd 5 years, 3 months ago (4635669)
- 0 answers
Posted by Aadarsh Kumar 5 years, 3 months ago (9609531)
- 3 answers
Suchitra Sen 5 years, 3 months ago (5047424)
Archita Verma 5 years, 3 months ago (9490432)
Sanidhya Rathod 5 years, 3 months ago (9875963)
Posted by Sonam Tshring 5 years, 3 months ago (9499453)
- 5 answers
Posted by Aadarsh Kumar 5 years, 3 months ago (9609531)
- 1 answers
Posted by Aadarsh Kumar 5 years, 3 months ago (9609531)
- 0 answers
Posted by Aadarsh Kumar 5 years, 3 months ago (9609531)
- 2 answers
Tanisha Dahiya 5 years, 3 months ago (8852859)
Posted by Aadarsh Kumar 5 years, 3 months ago (9609531)
- 4 answers
Sania Khan 5 years, 3 months ago (5272837)
Pranav Patle 5 years, 3 months ago (9502884)
Silent King 5 years, 3 months ago (9281260)
Archita Verma 5 years, 3 months ago (9490432)
Posted by Abhishesh Paswan 5 years, 3 months ago (9586469)
- 0 answers
myCBSEguide
Trusted by 1 Crore+ Students
Test Generator
Create papers online. It's FREE.
CUET Mock Tests
75,000+ questions to practice only on myCBSEguide app
