Write the value of : (a) standard temperature in: (i) ∘C (ii) K (b) Standard pressure in:
(i) atm (ii) mm Hg (iii) cm Hg (iv) torr
(a)
(i) 0oC
(ii) K = 273K
(b)
(i) 1 atm
(ii) 760 mm Hg
(iii) 76 cm Hg.
(iv) 7600 torr
At standard temperature, atmospheric pressure is less than 76 cm of Hg.
1,4 - β - glycosidic linkages are present in:
I) Starch II) Cellulose III) Lactose IV) Maltose
The unit torr is related to the barometric height as
(a) 1 torr = 1 cm of Hg
(b) 1 torr = 0.76 m of Hg (c) 1 torr = 1 mm of Hg
(d) 1 torr = 1 m of Hg
A sample of O2 gas is collected over water at 23∘C at a barometric pressure of 751 mm Hg (vapour pressure of water at 23∘ C is 21 mm Hg). The partial pressure of O2 gas in the sample collected is____.