First Ionization enthalpy of two elements X and Y are 500 kJ/mol-1 and 375 kJ /mol -1 respectively. Comment about their relative position in a group as well in a period.

Home » First Ionization enthalpy of two elements X and Y are 500 kJ/mol-1 and 375 kJ /mol -1 respectively. Comment about their relative position in a group as well in a period.

First Ionization enthalpy of two elements X and Y are 500 kJ/mol^-1 and 375 kJ /mol ^-1 respectively. Comment about their relative position in a group as well in a period.

Chemistry | Class 10 | ICSE | Periodic Table, Periodic Properties and Variations of Properties | Selina

First Ionization enthalpy of two elements X and Y are 500 kJ/mol^-1 and 375 kJ /mol ^-1 respectively. Comment about their relative position in a group as well in a period.

The ionization enthalpy of an element is the minimum amount of energy needed to remove the outermost electron from a gaseous neutral atom.

Given,

The relative position in a group: X is above the Y when the ionization energy decreases in the group downwards.

The relative position in a period: X is to the right side of Y when the ionization energy increases from left to right in a period.

i

A …… lens is used to correct myopia and a ….. lens is used to correct hypermetropia.
A Concave, concave
B Convex, convex
C Convex, concave
D Concave, convex

Rate of reaction of any substance depends on
(A) active mass
(B) molecular weight
(C) atomic weight
(D) equivalent weight

Formula of oleum is
(A) $\mathrm{H}_{2} \mathrm{~S}_{2} \mathrm{O}_{7}$
(B) $\mathrm{H}_{2} \mathrm{SO}_{4}$
(C) $\mathrm{H}_{2} \mathrm{SO}_{3}$
(D) $\mathrm{H}_{2} \mathrm{SO}_{5}$

Give two differences between double salt and complex salt.

Give two differences between DNA and RNA.

Find the shortest distance between the given lines.
$\begin{array}{l} \square \vec{r}=(\hat{i}+\hat{j})+\lambda(2 \hat{i}-\hat{j}+\hat{k}) \\ \vec{r}=(2 \hat{i}+\hat{j}-\hat{k})+\mu(3 \hat{i}-5 \hat{j}+2 \hat{k}) \end{array}$

Which of the following compounds has tetrahedral geometry? (a) $\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{-2}$ (b) $\left[\mathrm{Pd}(\mathrm{CN})_{4}\right]^{2-}$ (c) $\left[\mathrm{PdCl}_{4}\right]^{2-}$ (d) $\left[\mathrm{NiCl}_{4}\right]^{2}$

Oxidation number of gold metal is (a)+1 (b) 0 (c) $-1$ (d) all of these

← Previous Next →

More Material

Write chromyl chloride test with equation

What do you understand by lanthanide contraction

What are lanthanide elements?

Explain oxidization properties of potassium permanganate in acidic medium.

A …… lens is used to correct myopia and a ….. lens is used to correct hypermetropia.
A Concave, concave
B Convex, convex
C Convex, concave
D Concave, convex

Rate of reaction of any substance depends on
(A) active mass
(B) molecular weight
(C) atomic weight
(D) equivalent weight

Formula of oleum is
(A) $\mathrm{H}_{2} \mathrm{~S}_{2} \mathrm{O}_{7}$
(B) $\mathrm{H}_{2} \mathrm{SO}_{4}$
(C) $\mathrm{H}_{2} \mathrm{SO}_{3}$
(D) $\mathrm{H}_{2} \mathrm{SO}_{5}$

Give two differences between double salt and complex salt.

Give two differences between DNA and RNA.

Find the shortest distance between the given lines.
$\begin{array}{l} \square \vec{r}=(\hat{i}+\hat{j})+\lambda(2 \hat{i}-\hat{j}+\hat{k}) \\ \vec{r}=(2 \hat{i}+\hat{j}-\hat{k})+\mu(3 \hat{i}-5 \hat{j}+2 \hat{k}) \end{array}$

Which of the following compounds has tetrahedral geometry? (a) $\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{-2}$ (b) $\left[\mathrm{Pd}(\mathrm{CN})_{4}\right]^{2-}$ (c) $\left[\mathrm{PdCl}_{4}\right]^{2-}$ (d) $\left[\mathrm{NiCl}_{4}\right]^{2}$

Oxidation number of gold metal is (a)+1 (b) 0 (c) $-1$ (d) all of these

Sign up now and study all subjects for free

Class

Syllabus

Question Papers

Social Media

Apps