Chem quiz

Q.1 The water exchange rates for the complex ions follow the order

         (A) [V(H2O)6]2+ > [Co(H2O)6]2+ > [Cr(H2O)6]3+

         (B) [Cr(H2O)6]3+ > [Co(H2O)6]2+ > [V(H2O)6]2+

         (C) [Co(H2O)6]2+ > [Cr(H2O)6]3+  > [V(H2O)6]2+

         (D) [Co(H2O)6]2+ > [V(H2O)6]2+ > [Cr(H2O)6]3+

Ansewr:-D 

Q.2 Based on Wade’s rule, the structure-type of [B₅H₈]⁻ is
        (A) closo
        (B) nido
        (C)  arachno
        (D)  hypho

Ansewr:-B

Q.3  The coordination geometries around the copper ion of plastocyanin (a blue-copper protein) in              oxidized and reduced form, respectively, are
         (A) tetrahedral and square-planar
         (B) square-planar and tetrahedral
         (C) distorted tetrahedral for both
         (D) ideal tetrahedral for both

Answer:-C

Chem quiz

Q.1 Mention the formula to calculate pH of a solution?

 Answer:- In order to calculate the pH of a solution you have to use the formula pH= -log [H+] or pH                    = -log [H3O+]

Q.2 Mention how many millilitre is equal to 1 litre and how many microliter is equal to litre?
Answer:-  1 millilitre = 0.0001 litre
                 1 microliter = 0.0000001 litre

Q.3 Explain what is titration?

Answer:- Titration is a process to determine the molarity of a base or an acid. In this process a reaction is carried out between the known volumes of a solution with a known concentration, against the known volume of a solution with an unknown concentration.

Acid Base question

1.Soap is

   A.acidic

   B.alkaline
  C.neutral
  D.basic

Answer:B

2.Amphoteric oxides include
   A.SO2
   B.ZnO
   C.P2O5
   D.P4O10

Answer:B

3.When an acid (H+) is added to alkali (OH-), the product is
   A.hydroxides
   B.water
   C.salts
   D.hydrogen gas

Answer;C

4.Acids are
   A.corrosive
   B.turn litmus from blue to red
   C.sour in taste
   D.all of these

Answer;D

5.Distinction between a weak acid or strong acid can be made through

   A.litmus indicator

   B.universal indicator
   C..methyl orange indicator
   D.Phenolphthalein indicators

Answer;B