or
EU 5 Series
Recent Writer
Swarup Khatiwada
Recent Writer
Ishan
Recent Writer
Rabin Kalikote
Recent Writer
Prashiddha Bista
Recent Writer
Post Question Create Note Let's MCQ
NANDANI KUMARI • asked a question

Answer the following:

 (i) Transition elements form interstitial compounds.

(ii) Mns+(3d4) is strongly oxidising, whereas Cr2+(3d4) is strongly reducing.

(iii) Transition metals have high melting...

II)Cr2+ is reducing agent as its configuration changes from d4 to d3, when it is oxidized to Cr3+ .The d3 configuration have a half-filled t2g level which is very stable. On the other hand, the reduction of Mn3+ to Mn2+ results in the half-filled (d5) configuration which has extra stability hence Mn3+ acts as oxidizing agent.
0 Thanks
3 Answers
Answer Thread
Brijesh Chaudhary • about 3 years ago

What is the picture about?


4 Claps
0 Comments
Comment Read
Rabin Kalikote • asked a question

What is Riemann's green?

Riemann's green is a green pigment ZnO.CoO, which is obtained by heating a mixture of zinc oxide and cobalt nitrate or by the reaction of cobalt nitrate with either  or zinc sulphate.

21 Thanks
2 Answers
Answer Thread
Rakesh Yadav • over 2 years ago

Minds unite in Mattrab's domain,

Questions asked, wisdom to gain.

A community's bond, knowledge's reign,

Inquiry sparks, enlightenment's terrain.

4 Claps
0 Comments
Comment Read
Rabin Kalikote • 11 months ago

If we follow each other at Ask Mattrab, you will read this at some point. How are you?

2 Claps
1 Comments
Comment Read
Surakshya Pandey

very fine!

Reply 7mo
Rabin Kalikote

Glad to hear, miss!

7mo
Mousham khatiwada • over 2 years ago


5 Claps
1 Comments
Comment Read
Rabin Kalikote

Happy Mother's Day, sir.

Reply over 2y
Sachin Shrestha • over 2 years ago

F1 Visa Experience


Status: Approved

Date: July 19, 2023

Consulate: Kathmandu, Nepal

Major: Computer Science

Scholarship: 31k

COA after scholarship: 23k

VO: Straight hair

Time: 08:15


I reached the US embassy about an hour earlier than the appointment time. Hundreds of applicants were waiting for the gate to open and about 75% of them were for tourist visas. My turn was after about 50-60 applicants. I was very nervous in the beginning, so I...

7 Claps
1 Comments
Comment Read
Surakshya Pandey

Congratulations Sachin!!

Reply 7mo

Mattrab Community

Create, share and learn from the unlimited notes, photos and videos and ask your questions, answer your friends all over Nepal and grow. Create, share and learn.

Watch about Mattrab

Ask Mattrab is changing soon

We are excited for you to try new features. What are you excited about?

Close Open App