Shielding Effect

Q.

The first ionization potential in electron volts of nitrogen and oxygen atoms respectively are given by

1. 14.6, 14.6

2. 14.6, 13.6

3. 13.6, 14.6

4. 13.6, 13.6

Q.

A sub shell with l = 2 can take up a maximum of:

1. 5 electrons

2. 3 electrons

3. 8 electrons

4. 10 electrons

Q.

The screening effect of d-electrons is:

1. Equal to the p-electrons

2. More than p-electrons

3. Same as f-electrons

4. Less than p-electrons

Q. The screening effect of $d-$electrons is:

1. Equal to $p-$ electrons
2. Much more than $p-$ electrons
3. Same as $f-$ electrons
4. Less than $p-$ electrons

Q.

Paragraph for below question

नीचे दिये गये प्रश्न के लिए अनुच्छेद

As per the Lewis description of covalent bond, bond order is the number of chemical bonds between a pair of atoms in a molecule. For example, the bond order, in diatomic molecule such as H₂, O₂ and N₂ are 1, 2, 3 respectively. Bond order need not to be an integer; e.g. bond order between carbon atoms in benzene is 1.5.

सहसंयोजक बंध की लूईस व्याख्या के अनुसार, एक अणु में परमाणुओं के युग्म के मध्य रासायनिक बंधों की संख्या बंध क्रम कहलाती है। उदाहरण के लिए, द्विपरमाणुक अणुओं जैसे H₂, O₂ तथा N₂ में बंध क्रम क्रमशः 1, 2, 3 हैं। बंध क्रम का पूर्णांक होना आवश्यक नहीं है, उदाहरण के लिए बेन्जीन में कार्बन परमाणुओं के मध्य बंध क्रम 1.5 होता है।

Q. Consider the following species:

प्रश्न - निम्नलिखित स्पीशीज पर विचार कीजिएः

CO₂, NH₃, CN^–, SO₃

Which one of these will have the highest bond order?

निम्नलिखित में से किसका बंध क्रम अधिकतम होगा?

1. CO₂
2. NH₃
3. SO₃
4. CN^–

Q. 62. How many electrons are there in 3rd shell of a atom with atomic number 23

Q. $\text{Statement-I:}$ Shielding is effective when the orbitals in the inner shells are completely filled.
$\text{Statement-II}$ Across $3^{\text{rd}}$ period, nuclear charge outweighs the shielding.
In the light of the above statements, choose the correct answer from the options given below.

1. Statement-I is true but statement-ll is false
2. Both the statement-I and statement-ll are false
3. Both the statement-I and statement-ll are true
4. Statement-l is false but statement-Il is true

Q. 46 Sum of number of protons , electron, and Neutron in12 g ofC is

Q. why are 2p electrons attracted more towarsds nucleus than 3s electrons if shielding effect takes plac

Q. An atom is having 2k, 8l, 14m, 2n electrons. (a)-Calculate number of unpaired electrons. (b)- How many electrons are having value of m=o

Q.

The ionic species having largest size is

1. $L{i}_{\left(aq\right)}$

2. $N{a}_{\left(aq\right)}$

3. $R{b}_{\left(aq\right)}$

4. $L{i}_{\left(aq\right)}$

Q. 10. Number of electrons in 1) p orbitals 2) px orbital 3)dx*2-y*2 orbital With explination.

Q.

The atomic sizes of $Ga$ and $Al$ are almost the same because:

1. Poor shielding effect of the electrons in $d$ orbitals
2. More shielding effect of $d$ electrons

3. Poor shielding effect of $f$ orbitals in gallium

4. High screening effect of $3s,3pand3d$ electrons.

Q. In Photoelectric effect when the electrons are realesed on striking the beam of light how scientists know that electrons are release

Q. An atom is having 2k, 8l, 14m, 2n electrons. (a)-Calculate number of unpaired electrons. (b)- How many electrons are having value of m=o

Q. Find out the ratio of number of atoms in 1 gram NH3 and 1gram nitrogen

Q. what is the maximum number of orbital that}can be identified with the following quantum numbers n=3, =1, Ml =0

Q. The pair of elements that has almost same atomic radius among the following is

1. Zr, Hf
2. Y, La
3. Al, Ga
4. None of the above

Q. Calculate the $Z_{\text{eff}}$ on the electron present in $5d-$ orbital of $Gd$ (Atomic number $=64$).

Q.

Does "shielding effect" effect the size of element radius

Q.

explain shielding effect across d period and along d group .

Q. In an atom with 2K 8L 13M 2N electrons maximum possible electrons with m=0 s=1/2 is

Q. for h atoms degenerate orbitals option are 1s and 2p, 3s and 3d, 5s and 3d, 2p and 3p

Q. 127. The total spin resulting from d⁹ configuration is
i) 9/2
ii) 2
iii) 5/2
iv) 1/2