Questions
L,A,Z,D and J are 15th group elements belonging to Modern periodic table. The correct trend of dissociation constant(ka) of hydrides is LH3 > AH3 > ZH3 > DH3 > JH3. The element ‘A’ in the sequence is
detailed solution
Correct option is A
Down the group as the size of the atom increases affinity of hydrogen towards central atom decreases. Thereforea) X-H bond enthalpy decreases….N-H>P-H>As-H>Sb-H>Bi-H ;b) Thermal stability decreases….NH3>PH3>AsH3>SbH3>BiH3 ;NH3 is exothermic product,remaining four hydrides are endothermic products.c) Reducing power increases….NH3Similar Questions
Bond dissociation enthalpy of E - H (E = element) bonds is given below, which of the compounds will act as strongest reducing agent?
Compound | NH3 | PH3 | AsH3 | SbH3 |
389 | 322 | 297 | 255 |
Get your all doubts cleared from
Sri Chaitanya experts
799 666 8865
support@infinitylearn.com
6th Floor, NCC Building, Durgamma Cheruvu Road, Vittal Rao Nagar, HITEC City, Hyderabad, Telangana 500081.
JEE Mock Tests
JEE study guide
JEE Revision Notes
JEE Important Questions
JEE Sample Papers
JEE Previous Year's Papers
NEET previous year’s papers
NEET important questions
NEET sample papers
NEET revision notes
NEET study guide
NEET mock tests