Transition Element Quiz-13

Transition Element Quiz-13

Dear Readers,

The one subject in NEET which is candidates who can easily attain good marks is Chemistry. That's the reason, often, one doesn’t pay notice and choose to compromise it. But if one wants to rank above others, the tip is to be thorough with NEET chemistry concepts. The understanding of reactions and definite basic understanding is what requires major attention in Chemistry but once done it only gets simpler from there. The main focus on the to-do list should be on getting a hang of the NCERT syllabus of NEET chemistry. .

Q1.  Which metal cation forms stronger complex salt?

•   Zn²⁺
•   Cd²⁺
•   Hg²⁺
•   All of same strength

Solution
Hg²⁺ complex salts are more stable.

Q2.  Which oxide of Mn is acidic in nature?

•   MnO
•   Mn₂ O₇
•   Mn₂ O₃
•   MnO₂

Solution
In water it gives HMnO₄ (an acid).

Q3.  Copper nitrate on strongly heating gives:

•   Cu
•   Cupric oxide
•   Cuprous oxide
•   Cupric nitrate

Solution

Q4.  The element which exhibit both vertical and horizontal similarities are:

•   Inert gas elements
•   Representative elements
•   Rare elements
•   Transition elements

Solution
Transition elements

Q5. In the manufacture of iron from an iron oxide ore, limestone is added because it acts as:

•   An oxidizing agent
•   A reducing agent
•   A flux
•   A precipitating agent

Solution
  Haematite contains SiO₂ (acidic) non-fusible impurity and this basic flux CaCO₃ is used. 

   

Q6.  The pair of metals which dissolve in NaOH(aq.) is:

•   Al, Cu
•   Zn, Cd
• Pb, Sn
•   Zn, Al

Solution
Zn+2NaOH⟶Na₂ ZnO₂+H₂;
2Al+2NaOH+2H₂ O⟶2NaAlO₂+3H₂

Q7. Cerium (Z=58) is an important member of the lanthanides. Which of the following statement about cerium is incorrect?

•   The common oxidation states of cerium are +3 and +4
•   Cerium (IV) acts as an oxidizing agent
•   The +4 oxidation state of cerium is not known in solutions
•   The +3 oxidation state of cerium is more stable than the +4 oxidation state

Solution

Q8. For the four successive transition elements (Cr, Mn, Fe and Co), the stability of +2 oxidation state will be there in which of the following order?
(At. Nos. Cr = 24, Mn = 25, Fe = 26, Co = 27)

•   Cr > Mn > Co > Fe
•   Mn > Fe > Cr > Co
•   Fe > Mn > Co > Cr
•   Co > Mn > Fe > Cr

Solution
Mn²⁺ is most stable as it has half-filled d-orbitals.

Q9. Amalgams are:

•   Always solid
•   Highly coloured alloys
•   Alloys which contain mercury as one of the contents
•   Compounds of mercury

Solution
Hg-alloys with other metals are called amalgams.

Q10.  Stainless steel has iron and

•   Cr
•   Cu
•   Co
•   Zn

Solution
Stainless steel is an alloy of iron with chromium and nickel. Its composition is 82% Fe and 18% Cr +Ni. It resists corrosion and used for making automobile parts and utensils.