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
Which one of the following reactions will give NO (nitric oxide) gas as one of the products?
3Cu + 8HNO3 (dilute) →
Cu + 4HNO3 (Conc.) →
4Zn + 10HNO3 (dilute) →
Zn + 4HNO3 (Conc.) →
Which one of the following is a tribasic acid?
Hydrochloric acid
Nitric acid
Sulphuric acid
Phosphoric acid
Which one of the following statements is not correct?
All carbons in diamond are linked by carbon-carbon single bond.
Graphite is layered structure in which layers are held together by weak van der waals forces.
Graphite layers are formed by hexagonal rings of carbon atoms.
Graphite layers are held together by carbon-carbon single bond.
Which one of the following is called dry ice?
Solid carbon dioxide
Liquid carbon dioxide
Liquid nitrogen
Liquid ammonia
The acidic semi-digested food coming out of the stomach is neutralized by
pancreatic juice
duodenal secretion
large intestine secretion
bile juice
