Recently Active Class Vii X Chemistry Questions

Which of the following statements is true? ...

Which follows octet rule? ...

Consider the first ionization energies of the elements whose electronic configurations corresponds to the following.Which of these is the highest ? (i) [He]2s22p3 (ii) [He]2s22p4 (iii) [Ne]3s23p1 (iv)[Ar]3d104s1 ...

1) What is Dielectric Constant? 2) How is solubility of a substance measured? 3) What is lattice energy? ...

which of the following is the correct order of ionization energy 1. Be+>Be 2. Be>Be+ 3. C>Be 4. B>Be ...

An atom of one element A has four elements in its outermost shell, and that of B has six electrons in the outermost shell. The formula of the compound formed by these two will be ...

The first ionization potential of Na, Mg, Al, Si are in the order: ...

please give an example of rearrange reaction. ...

Arrange in order of Elecctronegativity .Oxygen(A), Chlorine(B), Sulphur(C). ...

In a certain alternate Universe the Aufbau principle is known to not work.The order of shell filling is according to the ascending order of azimuthal quantum numbers. What kind of element then will Calcium Be ? ...

Which of these gases have a triple bond? ...

In a material science laboratory certain salts were melted in order to find the ideal decorative crystal for interstellar travel. Salt A melted at 399 degrees, Salt B melted at 814 Salt C melted at 414 And salt D melted ...

You are given four boxes; containing four different types of substances. It is seen that the substance in the first one conducts electricity in its aqueous solution, the second conducts it in its native form/solid and the thi ...

Which of these salts is least ionic ? ...

Arrange the following hydroxides in order of their solubility. Magnesium hydroxide(1),Calcium Hydroxide (2),Barium Hydroxide (3),Strontium Hydroxide (4) ...

this is only for ix - x which of the following salts are soluble: a) Hg2Cl2 b) CaSO4 c) (NH4)2S d)AL2(SO4)3 finding the chemistry section empty... posted the thread.. ...

I didn't understand the s,p,d,f configuration dat was mentioned in d "blue" booklet 4 class IX (Preparatory Course For batch 2010-2011) in d Periodic Table Chapter. Anyone plz xplain me dat! ...

hi all! I am not able to understand what's a Lewis acid and a Lewis base. tell me if these are Lewis acids or Lewis bases and tell me the reason. HCl, H2SO4, H3PO4, CO2, HCN. my approach: first 3 I'm not able to decide. 4th o ...