When red hot steel is rapidly cooled in water, then the process is known as ____.
- Tampering
- Roasting
- Annealing
- Quenching
Submitted by :- Muhammad Nawaz
mnsoomro
Soda lime is a mixture of____________________?
A. CaO and KOH
B. CaO and NaOH
C. NaOH and Na2O
D. Na2O and KOH
Submitted by :- Jamil Ahmed
Which materials is a slag?
- BaO
- Cao
- SiO2
- CaSiO2
Submitted by :- Muhammad Nawaz
Which of the following is the compound formed by combination of impurities in the ores and foreign substance added?
- Gangue
- Slag
- Matrix
- Flux
Submitted by :- Muhammad Nawaz
Clemmensens reduction infolves the reduction of___________________?
A. ketone
B. alkane
C. aldehyde
D. all of the above
Submitted by :- Jamil Ahmed
Which is/are the ores of Mg?
- Karnalite
- Magnesite
- Dolomite
- All of these
Submitted by :- Muhammad Nawaz
When one hydrogen atom of alkane is removed then it is called________________?
A. alkene
B. alkyl
C. aldehyde
D. saturated hydrocarbon
Submitted by :- Jamil Ahmed
Which of the following is a chemical substance which is used to remove gangue from ore
- Slag
- Matrix
- Flux
- Gangue
Submitted by :- Muhammad Nawaz
Which is methyl cyanide_________________?
A. CH3NH2
B. CH3NO2
C. CH3CN
D. CH2 = CH – CN
Submitted by :- Jamil Ahmed
Which is/are the impurities which are present in ores?
- Gangue
- Slag
- Minerals
- Flux
Submitted by :- Muhammad Nawaz