(A) Be a colourless and odourless liquid
(B) Freeze at 0 Degree centigrade and boil at 100 degree centigrade
(C) Be neutral
(D) Be a solution containing water
Tag: Chemistry mcqs
A reverse reaction is not that?
(A) Which takes place from left to right
(B) In which reactants react to from products
(C) Which slows down gradually
(D) Which speeds up gradually
In the lime kiln the reaction CaCO3—>CaO+CO2 goes to completion because of?
(A) High temperature
(B) CaO is more stable than CaCO3
(C) CO2 escapes out continuosly
(D) CaO is not dissociated
Neil Bohr presented the atomic model in?
(A) 1907
(B) 1909
(C) 1910
(D) 1913
The element which is present in liquid state at room temperature is?
(A) Bromine
(B) Nitrogen
(C) Chlorine
(D) Phosphorous
The percentage value of O2 by weight in atmosphere is?
(A) 47%
(B) 86%
(C) 78%
(D) 21%
Extremely used metal is?
(A) Iron
(B) Cesium
(C) Lead
(D) Silver
The density of O2 gas at 20 Degree Centigrade is?
(A) 1.4 gdm-3
(B) 1.5 gcm-3
(C) 1.8 gdm-3
(D) 1.0 gdm-3