Download App

3. Classification of elements and periodicity in properties — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry3. Classification of elements and periodicity in properties1 Mark
MCQ
Electron affinity is the
  • A
    Energy absorbed when an electron is added to an isolated atom in the gaseous state
  • ✓
    Energy released when an electron is added to an isolated atom in the gaseous state
  • C
    Energy required to take out an electron from an isolated gaseous atom
  • D
    Power of an atom to attract an electron to itself
✓

Answer

Correct option: B.
Energy released when an electron is added to an isolated atom in the gaseous state
b
Electron affinity is the energy released when an electron is added to an isolated atom in the gaseous state.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from 3. Classification of elements and periodicity in properties→3. Classification of elements and periodicity in properties — all question types→Chemistry STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

The direct conversion of $\mathrm{A}$ to $\mathrm{B}$ is difficult, hence it is carried out by the following shown path: where $e.u.$ is entropy unit then $\Delta \mathrm{S}_{(A \rightarrow B)}$ is
→
The species which has bond angle $120^\circ $
→
All the elements in a group in the periodic table have the same
→
When tin is treated with concentrated nitric acid
→
If compound $MX_4$ has $\mu\, = 0$ then most probable geometry will be
→
How many stereoisomers possible for
→
Borax is actually made of two tetrahedra and two triangular units joined together and should be written as : $Na_2[B_4O_5(OH)_4]·8H_2O$

Consider the following statements about borax :

$a.$  Each boron atom has four $B-O$ bonds

$b.$  Each boron atom has three $B-O$ bonds

$c.$  Two boron atoms have four $B-O$ bonds while other two have three $B-O$ bonds

$d.$  Each boron atom has one $-OH$ groups

Select correct statement(s) :

→
Consider the reversible isothermal expansion of an ideal gas in a closed system at two different temperatures $T_1$ and $T_2$ $(T_1 < T_2)$. The correct graphical depiction of the dependence of work done$(w)$ on the final volume $(v)$.
→
A reaction is $A + B \to C + D$. Initially we start with equal concentration of $A$ and $B$. At equilibrium we find the moles of $C$ is two times of $A$. What is the equilibrium constant of the reaction
→
A homogeneous ideal gaseous reaction $AB _{2( g )} \rightleftharpoons A _{( g )}+2 B _{( g )}$ is carried out in a $25\, litre$ flask at $27^{\circ} C$. The initial amount of $AB _{2}$ was $1\, mole$ and the equilibrium pressure was $1.9 \,atm.$ The value of $K _{ P }$ is $x \times 10^{-2}$. The value of $x$ is $....\,.$ (Integer answer)
→