List of practice Questions

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

Edaphic factor refers to

Eddy currents do not cause :

Ecological niche is

Ecological equivalents (like two different predators feeding on same preys) occupy

Each of the following solids show, the Frenkel defect except

Earthworm respires through

Each diagonal element of a skew-symmetric matrix is