Download App

Classification of Elements and Periodicity in Properties — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistryClassification of Elements and Periodicity in Properties2 Marks
Question
Assign the position of elements having outer electronic configuration:
  1. ns2 np4 for n = 3
  2. (n - 1)d2 ns2 for n = 4
✓

Answer

  1. ns2 np4 for n = 3

Since n = 3; the element belongs to the third period. Futher, the element belongs to the p-block and group number 16.

  1. (n - 1)d2 ns2 for n = 4, the element belongs to period number 4 and group number 4.

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 "2 Marks Questions" from Classification of Elements and Periodicity in Properties→Classification of Elements and Periodicity in Properties — all question types→Chemistry STD 11 Science question papers→Rajasthan Board STD 11 Science question papers→Rajasthan Board question paper generator→

Similar questions

If total volume of gas obtained from electrolysis of water at NTP is $1 6 . 8$ litres. Calculate weight of electrolysed $H _2 O$.
→
Calculate the bond enthalpy of Cl-Cl bond from the following data:
CH4(g) + Cl2(g) → CH3Cl(l) + HCl(l); $[\Delta\text{H}=-100.3\text{kJ mol}^{-1}]$
Given, bond enthalpies of C-H, C-Cl and H-Cl bonds are 413, 326 and 431kJ mol-1 respectively.
→
Write the oxidation and reduction half reactions from the following redox reaction.
2Fe + 2H2O + O2 → 2Fe(OH)2
→
Classify each of the following carbon intermediates:
  1. $(\text{CH}_3)\text{C}^\bullet$
  2. $\text{CH}_3-\stackrel{{\ominus}}{\hbox{C}}\text{H}-\text{CH}_3$
  3. $\text{CH}_2=\text{CH}-\stackrel{{\ominus}}{\hbox{C}}\text{H}_2$
  4. $:\text{CCl}_2$
→
What happens when Cl2 gas is passed through aqueous solution of KBr?  What type of redox reaction is it?
→
Lead chloride has a solubility product of $1.7 \times 10^{-5}$ at 298 K . Calculate its solubility at this temperature.
→
Explain the shapes of the following on the basis of VSEPR theory:
  1. $\text{BeCl}_2$
  2. $\text{PH}_4^+$
  3. $\text{PF}_5$
  4. $\text{SF}_6$
→
Compare the dipole moment of the compounds in each of the following sets:
  1. CHCl3, CCl4
  2. CF4, SF4
  3. BF3, BCl3
  4. CO2, SO2
→
30 gm KCl is dissolved in 300 gm water and a solution is obtained. Calculate mass $\%$ of solution.
→
1m3 of C2H4 at STP Is burnt in oxygen, according to the thermochemical reaction:

$\text{C}_2\text{H}_4(\text{g})+3\text{O}_2(\text{g})\overrightarrow{\ \ \ \ \ \ \ }\ 2\text{CO}_2(\text{g})+2\text{H}_2\text{O(l)};$ $\Delta\text{H}=-1410\text{kJ mol}^{-1}$

Assuming 70% efficiency, determine how much of useful heat is evolved in the reaction.

→