Options:
- A. Roasting
- B. Forth flotation
- C. Electrolysis
- D. Distillation
View Answer
B. Forth flotation
Chemistry
In borax bead test which compound is formed_________?
Options:
- A. Ortho burate
- B. Meta borate
- C. Double oxide
- D. Tetra borate
View Answer
B. Meta borate
The amount of Zinc (at. Wt=65) necessary to produce 224 ml of H2 by the reaction with an acid will be______?
Options:
- A. 0.065gm
- B. 0.65gm
- C. 6.5gm
- D. 7.5gm
View Answer
D. 7.5gm
Column of manometer which faces liquid is __________ ?
Options:
- A. Raised
- B. Depressed
- C. Compressed
- D. Remains same
View Answer
B. Depressed
Methyl alcohol is not used__________________?
Options:
- A. As a solvent
- B. As an antifreezing agent
- C. As a substitute for petrol
- D. For denaturing of ethyl alcohol
View Answer
C. As a substitute for petrol
Carbon in wrought iron is present as_________?
Options:
- A. Silicon carbide
- B. Iron carbide
- C. Graphite
- D. Partly as iron carbide and partly as graphite
View Answer
B. Iron carbide
Chlorine Cl when attached to benzene has________?
Options:
- A. +I and +R effect
- B. -1 and +R effect
- C. +1 and -R effect
- D. -I and -R effect
View Answer
B. -1 and +R effect
When 0.01 moles of NaOH are added to a buffer solution, its PH changes from 4.745 to 4.832. What is its?
Options:
- A. 0.115
- B. 0.900
- C. 0.015
- D. 0.215
View Answer
A. 0.115
The concept of telluric helix was developed by___________?
Options:
- A. Lother Meyer
- B. A.E de Chancourtois
- C. Newland
- D. Dobereiner
View Answer
B. A.E de Chancourtois
The Latin word formica means ant. The name formic acid is derived from this Latin word because__________?
Options:
- A. this acid, in ancient times, was used to eliminate ant-hills
- B.
- C.
- D.
View Answer
C.