Electronegativity generally increases across a period from left to right and decreases down a group.
1. Silicon (Si): Silicon is in Group 14 and is below carbon. It has the lowest electronegativity among the given elements because it is further down the group.
2. Carbon (C): Carbon is in Group 14 and has a higher electronegativity than silicon because it is higher up in the group.
3. Nitrogen (N): Nitrogen is in Group 15 and has a higher electronegativity than carbon due to its position to the right of carbon in the same period.
4. Oxygen (O): Oxygen is in Group 16 and has a higher electronegativity than nitrogen because it is further to the right in the same period.
5. Fluorine (F): Fluorine is in Group 17 and has the highest electronegativity among the given elements because it is the furthest to the right in the period.
Therefore, the increasing order of electronegativity is:
Si < C < N < O < F
Conclusion:
The correct order is Si < C < N < O < F
Which of the following statements are true?
A. Unlike Ga that has a very high melting point, Cs has a very low melting point.
B. On Pauling scale, the electronegativity values of N and C are not the same.
C. $Ar, K^{+}, Cl^{–}, Ca^{2+} and S^{2–}$ are all isoelectronic species.
D. The correct order of the first ionization enthalpies of Na, Mg, Al, and Si is Si $>$ Al $>$ Mg $>$ Na.
E. The atomic radius of Cs is greater than that of Li and Rb.
Choose the correct answer from the options given below:
For the reaction A(g) $\rightleftharpoons$ 2B(g), the backward reaction rate constant is higher than the forward reaction rate constant by a factor of 2500, at 1000 K.
[Given: R = 0.0831 atm $mol^{–1} K^{–1}$]
$K_p$ for the reaction at 1000 K is:
Match List I with List II:
Choose the correct answer from the options given below:
Identify the suitable reagent for the following conversion: $Ph-C(=O)-OCH_3$ $\longrightarrow$ $Ph-CHO$
List-I | List-II | ||
| (A) | mI | (I) | Shape of orbital |
| (B) | ms | (II) | Size of orbital |
| (C) | I | (III) | Orientation of orbital |
| (D) | n | (IV) | Orientation of spin of electron |
Gadolinium has a low value of third ionisation enthalpy because of
The element expected to form largest in achieve the nearest noble gas configuration.
Noble gases are named because of their inertness towards reactivity. Identify an incorrect statement about them
A constant voltage of 50 V is maintained between the points A and B of the circuit shown in the figure. The current through the branch CD of the circuit is :
Which of the following statements are true?
A. Unlike Ga that has a very high melting point, Cs has a very low melting point.
B. On Pauling scale, the electronegativity values of N and C are not the same.
C. $Ar, K^{+}, Cl^{–}, Ca^{2+} and S^{2–}$ are all isoelectronic species.
D. The correct order of the first ionization enthalpies of Na, Mg, Al, and Si is Si $>$ Al $>$ Mg $>$ Na.
E. The atomic radius of Cs is greater than that of Li and Rb.
Choose the correct answer from the options given below:
AB is a part of an electrical circuit (see figure). The potential difference \(V_A - V_B\), at the instant when current \(i = 2\) A and is increasing at a rate of 1 amp/second is: