The atomic number of an element whose cation, X2+, has the ground state electronic configuration 1s22s22p63s22p6 is?

The boiling point of water, ethanol, toluene and butan-2-ol are 373.0k, 351.3k, 383.6k and 372.5k respectively. Which liquid has the highest vapour pressure ...

In what respect will two dry samples of nitrogen gas differ from each other if sample 1 is prepared by completely removing CO2 and O2 from air, and sample 2 ...

In the experiment, which of the following observations would suggest that a solid sample is a mixture? The

0.499g 0f CuSO4.xH2O when heated to constant weight gave a residue of 0.346g. the value of x is? (Cu = 63.5, S = 32.0, O = 16, H = 1)

Hydrogen is not liberated when trioxonitrate(v)acid reacts with zinc because

A certain volume of gas at 298k is heated such that its volume and pressure are now four times the original values. What is the new temperature?

Some properties of chemical substances are mentioned below... i. sour taste ii. slippery touch iii. yields alkaline gas with ammonium salt iv. has pH less th...

Copper sulphate solution is electolysed using platinum electrodes A. current of 0.193 amperes is passed for 2hrs. How many grams of copper are deposited? (cu...