Download App

The d- and f-Block Elements — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistryThe d- and f-Block Elements1 Mark
MCQ
Which of the following elements exhibits +8 oxidation state?
  • A
    Pt
  • B
    Mn
  • ✓
    Os
  • D
    Cu
✓

Answer

Correct option: C.
Os
c

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 The d- and f-Block Elements→The d- and f-Block Elements — all question types→Chemistry STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

Which of the following order is not correct
→
A protein ' $X$ ' with molecular weight of $70,000\,u$, on hydrolysis gives amino acids. One of these amino acid is
→
Which acid on heating produces phosphine ?
→
The product obtained by heating ${(N{H_4})_2}S{O_4}$ and $KCNO$ is
→
$\left[ {Co{{\left( {N{H_3}} \right)}_4}C{l_2}} \right]N{O_2}$ and $\left[ {Co{{\left( {N{H_3}} \right)}_4}Cl.N{O_2}} \right]Cl$ are ........ isomers
→
Catalyst $A$ reduces the activation energy for a reaction by $10\, k\,J\, mol ^{-1}$ at $300\, K$. The ratio of rate $\frac{ k _{ T }, \text { Catalysed }}{ k _{ T }, \text { Uncatalysed }}$ is $e ^{ x }$ [nearest integer $]$

[Assume theat the pre-exponential factor is same in both the cases.

Given $R =8.31 \,J\, K ^{-1} \,mol ^{-1}$ ]

→
The $IUPAC$ name for $[PtCl(NH_2CH_3)(NH_3)_2]Cl$ is
→
Which of following ion has the maximum theoretical magnetic moment?
→
An organic compound $A$ upon reacting with $NH_3$ gives $B.$ On heating $B$ gives $C.$ $C$ in presence of $KOH$ reacts with $Br_2$ to given $CH_3CH_2NH_2. A$ is :
→
Which of the following compounds is most reactive with $NaHCO_3$ ?
→