Ask questions which are clear, concise and easy to understand.
Ask QuestionPosted by Vansh Rana 5 years, 11 months ago
- 3 answers
Posted by Sandesh Patil 5 years, 11 months ago
- 1 answers
Yogita Ingle 5 years, 11 months ago
The three limitations of Mendeleev’s Classification are:
(i) The position of hydrogen was a big issue, he put hydrogen in the group of alkali metals.
(ii) He did not explain the wrong order of atomic masses of some elements.
(iii) The position of the isotopes of some elements could not be explained by him.
Posted by Kajal Phougat 5 years, 11 months ago
- 2 answers
Ayush Lohani 5 years, 11 months ago
Posted by Dorish Kadam 5 years, 11 months ago
- 0 answers
Posted by Dorish Kadam 5 years, 11 months ago
- 0 answers
Posted by Nitika Chaudhary 5 years, 11 months ago
- 2 answers
Yogita Ingle 5 years, 11 months ago
The process of igniting Aluminium and Ferric oxide is called thermite reaction. This is an exothermic reaction. Iron obtained in this process is in molten state.
Fe₂O₃ (s) + Al (s) →Al₂O₃ + 2 Fe(l) + Heat
Thermite reaction used for the welding of rails (joining metals) called as thermite welding.
Shreya ... 5 years, 11 months ago
Posted by Santhosh Shivan 5 years, 11 months ago
- 0 answers
Posted by Jaskaran Singh 5 years, 11 months ago
- 8 answers
Rupam Tyagi 5 years, 11 months ago
Posted by Shreya ... 5 years, 11 months ago
- 6 answers
Dr. Shreyas Samarth 5 years, 11 months ago
Posted by Usha Goswami 5 years, 11 months ago
- 7 answers
Shreya ... 5 years, 11 months ago
Posted by Agrasen Patel 5 years, 11 months ago
- 2 answers
Yogita Ingle 5 years, 11 months ago
Vande Mataram is a Bengali poem written by Bankim Chandra Chattopadhyay in 1870s and composed by Rabindranath Tagore. It was included in the 1881 novel Anandamath by BC Chattopadhyay. It became a popular marching song for political activism and the Swadeshi movement in 1905.
Posted by ___ Alone _____ 5 years, 11 months ago
- 20 answers
Aseem Mahajan 5 years, 11 months ago
Posted by Manthan Thakur 5 years, 11 months ago
- 1 answers
Posted by Aryaman Ranjan 5 years, 11 months ago
- 3 answers
Aadya Singh ? 5 years, 11 months ago
Posted by Aadya Singh ? 5 years, 11 months ago
- 11 answers
Posted by Aman Kumar 5 years, 11 months ago
- 1 answers
Yogita Ingle 5 years, 11 months ago
Let a be the first term and d be c.d. of the A P .Then
Sm=n
n= m/2{2a+ (m-1) d}
2n= 2am+ m ( m-1)d. ........(1)
And
S n= m
m= n / 2{2a+ (n-1) d}
2m = 2an+ n (n-1) d. ...........(2)
Subtracting eq.(2)- (1), we get
2a (m -1) + { m ( m - 1)- n ( n-1)}d = 2 n - 2 m
2a (m-n) + {(m ^ 2-n ^ 2) - ( m-n ) }d = -2(m-n)
2a + (m+n-1) d = -2. [On dividing both sides by ( m - n)]………(3)
Now,
Sm + n = m + n / 2{2a + (m + n - 1) d}
Sm + n = m + n / 2 (-2) ………[using (3)]
Sm + n= - ( m + n)
Hence Proved.
Posted by Aadya Singh ? 5 years, 11 months ago
- 16 answers
Aseem Mahajan 5 years, 11 months ago
Posted by Tejas V Kashyap 5 years, 11 months ago
- 1 answers
Aryaman Ranjan 5 years, 11 months ago
Posted by Sanket Arjun 5 years, 11 months ago
- 1 answers
Teena Chawla 5 years, 11 months ago
Posted by ___ Alone _____ 5 years, 11 months ago
- 20 answers
Aseem Mahajan 5 years, 11 months ago
Aseem Mahajan 5 years, 11 months ago
Posted by Avinab Chettri 5 years, 11 months ago
- 2 answers
Kaushiki Singh 5 years, 11 months ago
Aseem Mahajan 5 years, 11 months ago
Posted by Aadya Singh ? 5 years, 11 months ago
- 4 answers
Aseem Mahajan 5 years, 11 months ago
Posted by Ayush Trivedi 5 years, 11 months ago
- 1 answers
Posted by Nik . 5 years, 11 months ago
- 1 answers
Aseem Mahajan 5 years, 11 months ago
Posted by Sanket Arjun 5 years, 11 months ago
- 1 answers
Posted by Kuldeep Yadav 5 years, 11 months ago
- 0 answers
Posted by Nik . 5 years, 11 months ago
- 6 answers
Vidushi Saraw 5 years, 11 months ago
Aseem Mahajan 5 years, 11 months ago
Posted by Nik . 5 years, 11 months ago
- 1 answers
Aseem Mahajan 5 years, 11 months ago
Posted by Nik . 5 years, 11 months ago
- 3 answers
Posted by ..☦..?..Pang2..?..☦ ... 5 years, 11 months ago
- 1 answers
Aseem Mahajan 5 years, 11 months ago
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
Ajay ???? 5 years, 11 months ago
0Thank You