Indian army has published the notification for SSC Tech 56 men and SSC Tech 27 women for the course commencing at OTA Chennai from April 2021
The chemical used as a fixer/developer in photography is –
Sodium sulphate
Sodium sulphide
Sodium thiosulphate
Sodium sulphite
Which metal gives the name hemoglobin due to being its key component?
Nickel
Magnesium
Iron
Cobalt
Which chemical is mainly used in etching glass?
Hydrochloric acid
Sulphuric acid
Carbonic acid
Hydrofluoric acid
Water-gas is produced by:
Passing steam over red hot cake.
Passing steam and air over redhot cake
Burning coke in excess of air
Burning coke in the limited supply of air.
Which one of the halogen acids has a higher boiling point?
HF
HCl
HBr
HI
