CHEMISTRY ONE LINER SET 09

CHEMISTRY ONE LINER SET 09

1. In which type of coal percentage of carbon is the highest? Anthracite
 
2. What is formed when white phosphorus is heated at 540 K in the absence of
air?
Red phosphorus
 
3. Which acid is used to remove ink and rust stains and cloth? Oxalic acid
 
4. Which metal is present in photo films? Silver
 
5. Which is the highest grade of coal whose surface is shining and has the highest calorific value?
Anthracite
 
6. Which is an element which never exhibits positive oxidation state in any of its compounds?
Fluorine
 
7. Blue litmus paper is converted into red in solution of which thing? acid
 
8. Which is another name of RDX? Cycionite
 
9. What is the negative logarithmic value of hydrogen on called? pH
 
10. A bee-sting leaves an acid which causes pain and irritation. which is that injected acid?
Methanoic acid