Question
Select incorrect order$(s)$ of electronegativity of element is/are
✓
Answer
c
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Given below are two statements: one is labelled as Assertion $(A)$ and the other is labelled as Reason $(R).$
→Assertion $(A) :$ Metallic character decreases and non-metallic character increases on moving from left to right in a period.
Reason $(R)$ $:$ It is due to increase in ionisation enthalpy and decrease in electron gain enthalpy, when one moves from left to right in a period.
In the light of the above statements, choose the most appropriate answer from the options given below :
$IUPAC$ name of ferro ferricyanide is
→The enthalpy change $\left( {\Delta H} \right)$ for the reaction,
→$N_2(g) + 3H_2(g) \to 2NH_3(g$) is
$-92.38\, KJ$ at $298\, K$. The internal energy change $\left( {\Delta U} \right)$ at $298\, K$ is ........$KJ$
From the given sets of quantum numbers the one that is inconsistent with the theory is
The required amount of $KBr$ (molar mass $= 119$) in gram to start the precipitation of $AgBr$ in $500\, mL$ solution of $0.05\, M\, AgNO_3$ will be ($K_{SP}$ of $AgBr = 5 \times 10^{-13}$)
→Which of the following substances has giant covalent structure
The correct sequence of ligands in the order of decreasing field strength is:
In the given molecule $(NC)_3 CCCCHCHBr$ number of $\sigma $ and $\pi -$ bonds respectively are
→Pick the CORRECT match for the molecule in column A with the number of $C - C \sigma$, $C - H \sigma$ and $C - C \pi$ bonds in column B.
→| Column A | Column B |
| i. $HC \equiv C - CH = CH - CH _3$ | a. 2,3 and 0 |
| ii. $CH _2= C = CH - CH _3$ | b. 4,6 and 2 |
| iii. $CH _2- CH - C \equiv N$ | c. 4,6 and 3 |
iv.  | d. 3, 6 and 2 |
| e. 3, 6 and 2 |
In which of the following reaction, the hybridisation of the central atom changes from $sp^2$ to $sp^3$ ?
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