You are given two nuclides `"_3X^7` and `"_3X^4`:
Which one of the two is likely to be more stable?

You are given two nuclides "_3X^7 and "_3X^4 : Are they isotope of the same element? Why?

Which of the two NH_3 and PH_3 is more basic and why ?

Which pigment do you think is more stable?

Write two terms which are like : 7xy

Write two terms which are like 7xy

You are given two solution A and B having pH 1 and 6. which of these has more hydrogen ion concentration?

You are given two convex lenses of short aperture having focal lengths 4 cm and 8 cm respectively.Which one of these will you use as an objective and which one as an eye piece for constructing a compound microscope?

Which of the two NH_3 and PH_3 is more boiling point and why?