Periodic Table and Periodicity · Chemistry · AP EAPCET
MCQ (Single Correct Answer)
Among the ions $\mathrm{Mg}^{2+}, \mathrm{O}^{2-}, \mathrm{Al}^{3+}, \mathrm{F}^{-}, \mathrm{Na}^{+}$and $\mathrm{N}^{3-}$, the ion with largest size and ion with smallest size are respectively
$$ \text { Observe the following data : } $$
$$ \begin{array}{lllll} \hline \text { Ion } & Q^{a+} & X^{b+} & Y^{c+} & Z^{\alpha+} \\ \hline \text { Radius (pm) } & 53 & 66 & 40 & 100 \\ \hline \end{array} $$
$Q^{a+}, X^{b+}, Y^{c+}, Z^{d+}$ are respectively
Which of the following orders is not correct for the given property?
The order of negative electron gain enthalpy of $\mathrm{Li}, \mathrm{Na}$, $\mathrm{S}, \mathrm{Cl}$ is
The period and group numbers of the element having maximum electronegativity in the long form of periodic table respectively, are
Electronic configurations of four elements $A, B, C, D$ are given below
(A) $1 s^2 2 s^2 2 p^6 3 s^1$
(B) $1 s^2 2 s^2 2 p^6 3 s^2 3 p^1$
(C) $1 s^2 2 s^2 2 p^6 3 s^2$
(D) $1 s^2 2 s^2 2 p^6 3 s^2 3 p^2$
The correct order of first ionisation enthalpy of these elements is
The correct order of the non-metallic character among the elements $\mathrm{B}, \mathrm{C}, \mathrm{N}, \mathrm{F}$ and Si is
The correct order of atomic radii of $\mathrm{C}, \mathrm{Al}$ and S is
Which of the following orders is not correct about the property shown against it?
$$ \text { Match the following } $$
$$ \begin{array}{lllc} \hline & \text { List-I (Atomic number; Z) } & & \text { List-II (Block) } \\ \hline \text { A } & 112 & \text { I } & \text { s } \\ \hline \text { B } & 116 & \text { II } & \text { p } \\ \hline \text { C } & 88 & \text { III } & \text { d } \\ \hline \text { D } & 100 & \text { IV } & f \\ \hline \end{array} $$
The correct answer is$$ \text { Match the following. } $$
| List I (Symbol of element) |
List II (Group number) |
||
|---|---|---|---|
| A. | Mc | I. | 16 |
| B. | Lv | II. | 17 |
| C. | Fl | III. | 15 |
| D. | Ts | IV. | 14 |
Two statements are given below.
Statement I : Nitrogen has more ionisation enthalpy and electronegativity than beryllium.
Statement II : $\mathrm{CrO}_3, \mathrm{~B}_2 \mathrm{O}_3$ are acidic oxide.
Correct answer is
| $$ \text { List-I } $$ |
$$ \text { List-II } $$ |
||
|---|---|---|---|
| A | $$ \text { Ionisation enthalpy } $$ |
I | $$ \mathrm{P}<\mathrm{Si}<\mathrm{Mg}<\mathrm{Na} $$ |
| B | $$ \text { Metallic character } $$ |
II | $$ \mathrm{I}<\mathrm{N}<\mathrm{O}<\mathrm{F} $$ |
| C | $$ \text { Electron gain enthalpy } $$ |
III | $$ \mathrm{B}<\mathrm{Be}<\mathrm{C}<\mathrm{O}<\mathrm{N} $$ |
| D | $$ \text { Electronegativity } $$ |
IV | $$ \mathrm{l}<\mathrm{Br}<\mathrm{F}<\mathrm{Cl} $$ |
| List I (Element) | List II (Electron gain enthalpy (in $\mathrm{kJ} \mathrm{mol}^{-1}$ ) |
| A F | I -141 |
| B Cl | II -328 |
| C O | III -200 |
| D S | IV -349 |
In which of the following oxides of three elements $$X, Y$$ and $$Z$$ are correctly arranged in the increasing order of acidic nature. The electronic configurations of $$X, Y$$ and $$Z$$ are $$[\mathrm{Ne}] 3 s^2 3 p^1, [\mathrm{Ne}] 3 s^2 3 p^5$$. [Ne] $$3 s^2$$ respectively
Assertion (A) 16 th group elements have higher ionisation enthalpy values than 15 th group elements in the corresponding periods.
Reason (R) 15 th group elements have half-filled stable electronic configurations.
Assertion (A) Fluorine has smaller negative electron gain enthalpy than chlorine.
Reason (R) The electron-electron repulsion is higher in chlorine than in fluorine.
In which of the following, elements are arranged in the correct order of their electron gain enthalpies?
In second period of the long form of the periodic table an element $$X$$ has second lowest first ionisation enthalpy and element $$Y$$ has second highest first ionisation enthalpy values. What are $$X$$ and $$Y$$ ?
Lithium shows diagonal relationship with element '$$X$$' and aluminium with $$Y . X$$ and $$Y$$ respectively are
The correct order of the metallic character of the elements $$\mathrm{Be}, \mathrm{Al}, \mathrm{Na}, \mathrm{K}$$ is
Which of the following tetrahalides does not exist?
The electronegativity of the given elements increases in the order.
The first ionisation enthalpies of $$\mathrm{Mg}$$ and $$\mathrm{Al}$$ can be expected to be ............ .
Which of the following statements is/are correct?
1. Mercury is the only metal that exists as liquid at room temperature.
2. Among non-metals, carbon has the highest melting point.
3. Hydrogen is the most abundant element in the universe.
4. Oxygen is the most abundant element in the Earth's crust.
The element with outer electronic configuration $$(n-1) d^2 n s^2$$, where $$n=4$$, would belong to
Choose the correct option regarding the following statements
Statement 1 Nitrogen has lesser electron gain enthalpy than oxygen.
Statement 2 Oxygen has lesser ionisation enthalpy than nitrogen.
Among the given configurations, identify the element which does not belong to the same family as the others?
Which statements among the following are correct about helium?
(i) Liquid helium is used to sustain powerful superconducting magnets.
(ii) Liquid helium is useful to carry low temperature experiments.
(iii) It is a heavy gas.
(iv) It is a flammable gas.
Which of the following represents the correct order of increasing electron gain enthalpy with negative sign for the elements?
1. Nitrogen (N) 2. Phosphorus (P) 3. Chlorine (Cl) 4. Fluorine (F)