Periodic Table 09 Ionization Enthalpy & Its periodicity For Class 11th Chap 03 Iit Jee Neet mp4

(a) Element of Gr. 16 generally show lower value of first ionization enthalpy compared to the corresponding periods of Br. 15 Why? (b) What happens with (i) concentrated H_(2)SO_(4) is added to CaF_(2) ? (ii) sulphur dioxide reacts with chlorine in the presence of charcoal? (iii) ammonium chloride is treated with Ca(OH)_(2) ?

The number of elements in the 4th period of periodic table is

In the modern periodic table, magnesium is surrounded by elements with atomic numbers 4, 11, 13 and 20. Identify the elements. Which of these have chemical properties resembling magnesium?

Assertion: Electron gain enthalpy value of the 3rd peirod p-block elements of the mordern periodic table are generally more negative than the 2nd period element of the same group. Reason: Due to smaller atomic size of the 2nd peirod element, its electron density is high which eases the addition of electron.

Q. Statement I Three pendulums are suspended from ceiling as shown in Fig. These three pendulums are set to oscillate as shon by arrows, and it is found that all three have same time period. Noe, all three are taken to a place where acceleration due to gravity changes to 4/9th of its value at the first place. If spring pendulum makes 60 cycles in a given time at this place, then torsion pendulum and simple pendulum will also make 60 oscillation in same (given) time interval. Statement II: Time period of torsion pendulum is independent of acceleration due to gravity.