Download App

p -Block elements - ll — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistryp -Block elements - ll1 Mark
MCQ
Which of the following does not give oxygen on heating ?
  • A
    $K_2Cr_2O_7$
  • ✓
    $(NH_4)_2Cr_2O_7$
  • C
    $KClO_3$
  • D
    $Zn(ClO_3)_2$
✓

Answer

Correct option: B.
$(NH_4)_2Cr_2O_7$
b
$\left(\mathrm{NH}_{4}\right)_{2} \mathrm{Cr}_{2} \mathrm{O}_{7} \stackrel{\Delta}{\longrightarrow} \mathrm{N}_{2}+\mathrm{Cr}_{2} \mathrm{O}_{3}+4 \mathrm{H}_{2} \mathrm{O}$ do not produces $\mathrm{O}_{2}$

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 - ll→p -Block elements - ll — all question types→Chemistry STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

$Ph\, - \,NC\,\xrightarrow{{LiAl{H_4}}}A\,\xrightarrow{{NaN{O_3} + HCl}}B$ Identify product $B$
→
When phenol is treated with $PCl_5,$ the yield of chlorobenzene is generally poor because of the formation of
→
When vapour of ethanol are passed over platinised asbestos in excess of air, the compound formed is
→
Phenol dimerised to $60\%$ in a solvent. The observed molecular weight of phenol will be
→
The prosthetic group present in nucleoproteins is:
→
Mixture $X$ of $0.02\, mole$ of $[Co(NH_3)_5SO_4]Br$ and $0.02 \,mole$ of  $[Co(NH_3)_5Br]SO_4$ was prepared in $2$ litre of solution :

$1$ litre of mixture $X +$ excess of $AgNO_3 \to Y$

$1$ litre of mixture $X +$ excess of $Ba Cl_2 \to Z$

Number of moles of $Y$ and $Z$ respectively are

→
Starch is converted into maltose by the
→
Total number of isomers possible for the complex $[Co(en)_2Cl_2]$ is
→
Which one of the following is laevorotatory
→
Which of the following has maximum boiling point ?
→