List of practice Questions

Who demonstrated that green plants purify the foul air produced by breathing animals and burning candles?
White P is more reactive than $N_2$ because
White light is passed through a prism of angle 5.If the refractive indices of red and blue colours are 1.641 and 1.659 respectively, the angle of dispersion between them is
Who proposed a modification in the cell theory?
Who is the father of genetic engineering?
Who is regarded as Father of Zoology and Biology?
Who gave the lamellar or sandwich model of cell membrane?
Who provided the evidence that glucose is formed during photosynthesis and is then stored in the form of starch?
Who proposed the fluid mosaic model of plasma membrane?
Who proposed the "Cohesion Theory" of ascent of sap?
Who proposed binomial system of nomenclature?
Why do noble gases have positive electron gain enthalpy?
Why all $P - F$ bonds in $PF_5$ are not equivalent ?
Why 220 V ac is more dangerous than 220 V dc
Who was the first to introduce the concept of antiparticle theoretically?
Why is it necessary to remove sulphur from petroleum products?
Why is ferric hydroxide colloid positively charged when prepared by adding ferric chloride to hot water?
Why is alum added to water containing suspended impurities?
Why insulin not administered orally to diabetic patient?
Wildlife refers to
Why is the electron gain enthalpy of $O$ or $F$ less than that of $S$ or $Cl$?
Why is partial roasting of sulphide ore done in metallurgy of copper?
With increase in temperature the viscosity of
Wires A and B are made from the same material. A has twice the diameter and three times the length of B. If the elastic limits are not reached, when each is stretched by the same tension, the ratio of energy stored in A to that in B is
With respect to the fungal sexual cycle, choose the correct sequence of events.