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
Which of the following is the correct order of gradually decreasing basic nature of the oxides
  • A
    $A{l_2}{O_3}$, $MgO$, $C{l_2}{O_7}$, $S{O_3}$
  • ✓
    $MgO$, $A{l_2}{O_3}$, $S{O_3}$, $C{l_2}{O_7}$
  • C
    $C{l_2}{O_7}$, $S{O_3}$, $A{l_2}{O_3}$, $MgO$
  • D
    $S{O_3}$, $C{l_2}{O_7}$, $MgO$, $A{l_2}{O_3}$
✓

Answer

Correct option: B.
$MgO$, $A{l_2}{O_3}$, $S{O_3}$, $C{l_2}{O_7}$
b
(b) Across the period non-metallic character increases. Hence basic nature of oxide decreases.

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

Aluminium is usually found in $+3$ oxidation state. In contrast, thallium exists in $+1$ and $+3$ oxidation states. This is due to
→
Two solutions $A$ and $B$, each of $100\; L$ was made by dissolving $4 \;\mathrm{g}$ of $\mathrm{NaOH}$ and $9.8 \;\mathrm{g}$ of $\mathrm{H}_{2} \mathrm{SO}_{4}$ in water, respectively. The $\mathrm{pH}$ of the resultant solution obtained from mixing $40\; \mathrm{L}$ of solution $A$ and $10\; \mathrm{L}$ of solution $\mathrm{B}$ is
→
For the decomposition of the compound, represented as $N{H_2}COON{H_4}\left( s \right) \rightleftharpoons 2N{H_3}\left( g \right) + C{O_2}\left( g \right)$ the $K_p\, =2.9\times10^{- 5}\, atm^3$ . If the reaction is started with $1\, mol$ of the compound, the total pressure at equilibrium would be............$\times10^{-2}\, atm$
→
Which compound is formed when calcium carbide reacts with heavy water?
→
Which of the following elements will have the lowest first ionisation energy
→
For the reaction, $A(g) + 2B(g) \rightleftharpoons 2C(g)$ at $25\,^oC, 2 \,moles$ of $A, 1\, mole$ of $B$ and $1\, mole$ of $C$ are present in $1$ litre vessel if $K_c$ for the reaction is $2$, then reaction will proceed in
→
Which of the following is correct on the basis of hund's rule but not follow Pauli's principle
→
The $pH$ of blood is
→
In Duma's method for estimation of nitrogen, $0.25\,g$ of an organic compound gave $40\,mL$ of nitrogen collected at $300\,K$ temperature and $725\,mm$ pressure. If the aqueous tension at $300\,K$ is $25\,mm$ , the percentage of nitrogen in the compound is
→
Among the following, the weakest base is
→