List of practice Questions

Energy required to move a body of mass $m$ from an orbital radius $2R$ to $3R$ is

Embryo sac is to ovule as _____ is to an anther.

Emergency contraceptives are effective if used within

EMP path is another name of

Eli Lily prepared insulin genes A and B

Elephantiasis, a chronic inflammation that results in gross deformities is caused by

Elements $X$, $Y$ and $Z$ have atomic numbers $19$, $37$ and $55$ respectively. Which of the following statements is true about them?

Element X forms a chloride with the formula $XCl_2$, which is a solid with a high melting point. X would most likely be in the same group of the Periodic Table as -

Elements of group-$15$ form compounds in $+5$ oxidation state. However, bismuth forms only one well characterised compound in $+5$ oxidation state. The compound is

Element of group 16 (except polonium) are called chalcogens because

Element having maximum electron affinity is

Element found in the sediments in the ocean floor is

Electronic configuration (outermost) of $Mn^{2+}$ ion(At. No. of Mn = 25) in its ground state is

Electropositive character for the elements of group $13$ follows the order

Electronic configuration of Germanium is $2, 8, 18$ and $4$ . To make it extrinsic semi-conductor small quantity of antimony is added

Electrolytic reduction method is used in the extraction of

Electromagnetic separation is used in the concentration of

Electrical conductance through metals is called metallic or electronic conductance and is due to the movement of electrons. The electronic conductance depends on

Eka-aluminium and Eka-silicon are known as

Eight coins are thrown simultaneously. Find the probability of getting atleast $6$ heads.

Eight coins are thrown simultaneously. What is the probability of getting atleast $3$ heads?

Effective atomic number of Fe in the complex $K_4[Fe(CN)_6]$ is

Edge length of a cube is 400 pm. Its body diagonal would be

Edible roots are found in

Ecotone is