Activity of an enzyme can be modulated by change of [a] pH
[b] Light [c] Humidity [d] Rainfall
Which of the following reagents gives a silver mirror test when added to aldehydes? 1 Fehling’s solution 2 Tollen’s Reagent 3 Ebaeyer’s Reagent 4 Nessler’s Reagent
1.what is a pasacline?who invented it? 2.who was the first man to go into space?
Old-written material, which cannot be read easily, can be read by 1 Cosmic rays 2 Ultraviolet rays 3 Infra red rays 4 None of these
first aid to person affected with electrical shock
Emerald is ----in colour 1 Violet 2 Yellow 3 Deep green 4 Prussian blue
Which scientist made detailed study on novae?
How does common salt help in separating soap from the solution after saponification ? 1 By decreasing solubility of soap 2 By increasing solubility of soap 3 By decreasing density of soap 4 By increasing density of soap
where the 3rd earthsummit held
In which year, atmospheric observations using balloons started?
Which is the largest refractor telescope?
Which scientists gave detailed information about nebula?
Which of the following metals can displace zinc from a solution of zinc sulphate? 1 Lead 2 Magnesium 3 Iron 4 Mercury