Download App

-p-Block elements - I — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry-p-Block elements - I1 Mark
MCQ
Assertion : Atomic radius of gallium is higher than that of aluminium

Reason : The presence of additional $d-$ electron offer poor screening effect for the outer electrons from increased nuclear charge.

  • A
    If the Assertion is correct but Reason is incorrect.
  • B
    If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
  • ✓
    If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
  • D
    If both the Assertion and Reason are incorrect.
✓

Answer

Correct option: C.
If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
c
Atomic radius of gallium is less than that of aluminium.

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 -p-Block elements - I→-p-Block elements - I — all question types→Chemistry STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

Which of the following are state functions?
→
The group having isoelectronic species is :
→
Consider the following reaction

${R_2}SiC{l_2} + {H_2}O \to (1)\xrightarrow{{polymerisation}}(2)$ 

Compound $(2)$ in above reaction is

→
The one which has the highest value of $pH$ is
→
On a given condition, the equilibrium concentration of $HI,\,{H_2}$ and ${I_2}$ are $0.80, \,0.10$ and $0.10$ mole/litre. The equilibrium constant for the reaction ${H_2} + {I_2}$ $\rightleftharpoons$ $2HI$ will be
→
Property of all the alkaline earth metals that increases with their atomic number is:
→
The density of a solution containing $13\%$ by mass of $H_2SO_4$ is $1.09\,gm/ml$. The molarity and normality of the solution are respectively :-
→
“The resultant heat change in a reaction is the same whether it takes place in one or several stages.” This statement is called
→
The electronic configuration of four elements $L, P, Q$ and $R$ are given in brackets $L\,\left( {1{s^2},\,\,2{s^2}\,2{p^4}} \right);\,\,Q\,\left( {1{s^2},\,\,2{s^2}\,2{p^6},\,\,3{s^2}\,\,3{p^5}} \right)$;$P$

$\,\left( {1{s^2},\,\,2{s^2}\,2{p^6},\,\,3{s^1}} \right);\,\,R\,\left( {1{s^2},\,\,2{s^2}\,2{p^6},\,\,3{s^2}} \right)$The formula of ionic compounds that can be formed between these elements are

→
What is the mass of the solvent present in $200g$ of $25\%\ (w/ W) $ calcium hydroxide solution?
→