PT Flashcards
A:- Generally, ionization enthalpy increases from left to right in a period.
R:- When successive electrons are added to the orbitals in the same principle quantum level, the shielding effect of inner core of electrons does not increase very much to compensate for the increased attraction of the electron to the nucleus.
A:- आम तौर पर, आयनीकरण एन्थैल्पी एक आवर्त में बाएं से दाएं बढ़ती है।
R:- जब लगातार इलेक्ट्रॉनों को समान mukhiye क्वांटम स्तर में कक्षाओं में जोड़ा जाता है, तो इलेक्ट्रॉनों के आंतरिक कोर का परिरक्षण प्रभाव नाभिक के लिए इलेक्ट्रॉन के बढ़ते आकर्षण की भरपाई करने के लिए बहुत अधिक नहीं बढ़ता है।
(1)
Neet mail series 23, ep 3, 50:00
A:- Boron has a smaller first ionization enthalpy than beryllium.
R:- The penetration of a 2s e- to nucleus is more than the 2p e- hence 2p e- is more shielded by the inner core of e- than the 2s e-.
(1)
A:- e- gain enthalpy becomes less negative as we go down a group
R:- Size of the atom increase on going down the group and the added e- would be nearer to the nucleus.
(4)
A:- Ismay F and Cl may expecting hota hai hai isliye A glat hai
R:- jab size increase hoga to added e- nucleus se dur jayge naki pass
R:- A plot of v (where v [nyu] is frequency of x rays emitted) √z against gave a straight line.
R is wrong
Straight line graph √v (nyu) or z ke bich aata hai
A:- IUPAC symbol of element which Z=120 would be ubn.
R:- This element would be place in group 2 (i.e. alkali metals).
(3)
R:- Z=120 group 2 may hi aayga but group alkali earth metals ka hota hai
A:- 5th period of periodic table can accommodate max 18 e-.
R:- Correct energy order for subsequent can be explained by n+l rule
(2)
A:- period may e- nikalne ka formula
1st: agr odd no. ho period ka tab
( n+1)²/2 = (5+1)²/2 => 36/2 => 18
2nd: agr even no. ho tab
(n+2)²/2
R:- shi hai but explain nhi Kar rha hai
Explaination:- 5th period may 9 orbital hote hai
A:- Amongst O²- , F‐, Na+ , Mg²+ the smallest ion is Mg²+.
R:- Two or more species with same number of atoms, same number of valance e- and same structure, regardless of the nature of elements involved are known as isoelectronic species.
(2)
Explaination:- jika nuclear charge jyda tab net attraction jyda hoga, jisse radius kam
A:- As2O3 is an amphoteric oxide.
R:- As is a metalloid.
(2)
Matalloid hona par jaruri nhi hai ki us metal ka oxide amphoteric ho
A:- Correct order of chemical reactivity in terms of oxidizing property is F>O>Cl>N.
R:- Maximum oxidizing power of fluorine can be explain by its most electronegative nature.
(3)
Oxidizing power ko SRP decide karta hai
Non metal ka SRP tin chezo par depend karta hai
1st:- BDE bond dissociation energy
2nd:- e- gain enthalpy
3rd:- hydration energy
Acidic oxide eg
B2O3, SiO2, As2O5, Cl2O7, V2O5, CrO3, Mn2O7, MnO3 etc.
Basic oxide
Na2O
Amphibolic oxide
Al2O3, As2O3
Be, Al, Zn, Ga, In, Sn, Pb, Bi ke oxide bhi amphibolic hote hai
