English
Karnataka Board PUCPUC Science 2nd PUC Class 12

Match the properties given in Column I with the metals given in Column II. Column I (Property) Column II (Metal) (i) An element which can show +8 oxidation state (a) Mn (ii) 3d block element that - Chemistry

Advertisements
Advertisements

Question

Match the properties given in Column I with the metals given in Column II.

  Column I (Property) Column II (Metal)
(i)  An element which can show +8 oxidation state (a) \[\ce{Mn}\]
(ii)  3d block element that can show (b) \[\ce{Cr}\]
  upto +7 oxidation state (c) \[\ce{Os}\]
(iii)  3d block element with highest melting point (d) \[\ce{Fe}\]
Match the Columns
Advertisements

Solution

  Column I (Property) Column II (Metal)
(i)  An element which can show +8 oxidation state (c) \[\ce{Os}\]
(ii)  3d block element that can show
upto +7 oxidation state
(a) \[\ce{Mn}\]
(iii)  3d block element with highest melting point  (b) \[\ce{Cr}\]
shaalaa.com
  Is there an error in this question or solution?
Chapter 8: The d-and f-Block Elements - Multiple Choice Questions (Type - I) [Page 112]

APPEARS IN

NCERT Exemplar Chemistry [English] Class 12
Chapter 8 The d-and f-Block Elements
Multiple Choice Questions (Type - I) | Q 54 | Page 112

RELATED QUESTIONS

Which of the following cations are coloured in aqueous solutions and why ?

Sc3+, V3+, Ti4+, Mn2+ (At. Nos. Sc = 21, V = 23, Ti = 22, Mn = 25)


Calculate magnetic moment of  `Fe_((aq))^(2+) ion (Z=26).`


Account for the following:

Zn is not considered as a transition element.


To what extent do the electronic configurations decide the stability of oxidation states in the first series of the transition elements? Illustrate your answer with examples.


Describe the oxidising action of potassium dichromate and write the ionic equation for its reaction with iodide.


Dissociation of H2S is suppressed in acidic medium.


Give reasons for the following:

The transition metals generally form coloured compounds.


Reactivity of transition elements decreases almost regularly from Sc to Cu. Explain.


Read the passage given below and answer the following question.

Are there nuclear reactions going on in our bodies?

There are nuclear reactions constantly occurring in our bodies, but there are very few of them compared to the chemical reactions, and they do not affect our bodies much. All of the physical processes that take place to keep a human body running are chemical processes. Nuclear reactions can lead to chemical damage, which the body may notice and try to fix. The nuclear reaction occurring in our bodies is radioactive decay. This is the change of a less stable nucleus to a more stable nucleus. Every atom has either a stable nucleus or an unstable nucleus, depending on how big it is and on the ratio of protons to neutrons. The ratio of neutrons to protons in a stable nucleus is thus around 1 : 1 for small nuclei (Z < 20). Nuclei with too many neutrons, too few neutrons, or that are simply too big are unstable. They eventually transform to a stable form through radioactive decay. Wherever there are atoms with unstable nuclei (radioactive atoms), there are nuclear reactions occurring naturally. The interesting thing is that there are small amounts of radioactive atoms everywhere: in your chair, in the ground, in the food you eat, and yes, in your body.

The most common natural radioactive isotopes in humans are carbon-14 and potassium-40. Chemically, these isotopes behave exactly like stable carbon and potassium. For this reason, the body uses carbon-14 and potassium-40 just like it does normal carbon and potassium; building them into the different parts of the cells, without knowing that they are radioactive. In time, carbon-14 atoms decay to stable nitrogen atoms and potassium-40 atoms decay to stable calcium atoms. Chemicals in the body that relied on having a carbon-14 atom or potassium-40 atom in a certain spot will suddenly have a nitrogen or calcium atom. Such a change damages the chemical. Normally, such changes are so rare, that the body can repair the damage or filter away the damaged chemicals.

The natural occurrence of carbon-14 decay in the body is the core principle behind carbon dating. As long as a person is alive and still eating, every carbon-14 atom that decays into a nitrogen atom is replaced on average with a new carbon-14 atom. But once a person dies, he stops replacing the decaying carbon-14 atoms. Slowly the carbon-14 atoms decay to nitrogen without being replaced, so that there is less and less carbon-14 in a dead body. The rate at which carbon-14 decays is constant and follows first order kinetics. It has a half-life of nearly 6000 years, so by measuring the relative amount of carbon-14 in a bone, archeologists can calculate when the person died. All living organisms consume carbon, so carbon dating can be used to date any living organism, and any object made from a living organism. Bones, wood, leather, and even paper can be accurately dated, as long as they first existed within the last 60,000 years. This is all because of the fact that nuclear reactions naturally occur in living organisms.

Why is Carbon-14 radioactive while Carbon-12 not? (Atomic number of Carbon: 6)


A complex in which dsp2 hybridisation takes place is ______.


Which of the following transition metal is not coloured?


Why are all copper halides known except that copper iodide?


Give reason for the following statement:

[Ti(H2O)]3+ is coloured while [Sc(H2O)6]3+ is colourless.


Which of the following transition metals shows +1 and +2 oxidation states?


Account for the following:

Eu2+ with electronic configuration [Xe]4f76s2 is a strong reducing agent.


In order to protect iron from corrosion, which one will you prefer as a sacrificial electrode, Ni or Zn? Why? (Given standard electrode potentials of Ni, Fe and Zn are -0.25 V, -0.44 V and -0.76 V respectively.)


Explain the magnetic properties of d-block (or transition) elements.


Decide which of the following atomic numbers are the atomic numbers of the inner transition elements:

29, 59, 74, 95, 102, 104


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×