List of top Science Questions

Which of the following is an example of regeneration?
Bile juice is secreted by
Bauxite is an ore of which of the following metals?
The correct order of reactivity of metals is
$\mathrm{Fe_2O_3 + 2Al \rightarrow Al_2O_3 + 2Fe$ is which of the following types reaction?}
Boron and aluminium belong to which group of elements in periodic table?
Carbon combines with hydrogen to form
Which pigment makes the colour of urine yellow?
A solution turns red litmus into blue. The pH value of this solution would be:
The atomic number of potassium is 19. What is the valency?
What is the atomic number of fluorine?
What is the general formula of an alkane?
A prism is bounded by how many surfaces?
What is the atomic weight of oxygen?
What is the refractive index of diamond?
The magnification (m) in a concave lens is equal to:
Which of the following organic compounds is an alkyne?
The focal length of which mirror is taken as negative according to the convention of signs?
Where is the object placed to form a magnified virtual image in a concave mirror?
How many laws of refraction of light are there?
What is the value of refractive index of a medium?
What is the S.I. unit of power of lens?
What is Philosopher’s wool?
How many bonds are there between two atoms of one molecule of oxygen gas?
Iodized salt is: