Chemistry - Online Test
Q1. The correct sequence of steps involved in the mechanism of Cannizzaro's reaction is
Answer : Option D
Explaination / Solution:
In cannizaro reaction 1st nucleophile OH− attacks on carbonyl carbon. Then hydride shifting take place. Followed by proton transfer.
Q2. How many hydrogen-bonded water molecule(s) are associated in
Answer : Option A
Explaination / Solution:
In crystal structure of Copper sulphate pentahydrate there only 4 water molecule of hydration and one water molecule is associated with hydrogen bonding interaction.
Q3. Drugs, which inhibit the enzymes that catalyze the degradation of noradrenaline, are
Answer : Option A
Explaination / Solution:
They are antidepressants.
Q4. Which of the following is a negative ligand?
Answer : Option B
Explaination / Solution:
C5H5− a negative ligand.
Q5. Calculate the standard cell potentials of galvanic cell, and equilibrium constant of the reactions if the reaction is
Answer : Option D
Explaination / Solution:
Q6. The shape of the below molecule is
Answer : Option C
Explaination / Solution:
Bent shape is the shape of a molecule with 3 atoms that have a bond angle less than 180°.
Q7. The following compound is ,as per the IUPAC system
Answer : Option C
Explaination / Solution:
Longest chain contains double bond.
Q8. Choose the correct trend of the melting and boiling points in the alkali metal halides, MF, MCl, MI, MBr.
Answer : Option B
Explaination / Solution:
Smaller is the size of anion less is the polarizing power of anion so greater is the ionic character hence greater will be melting point.
Q9. A covalent bond when cleaved heterolytically yields:
Answer : Option D
Explaination / Solution:
heterolytic cleavage produces carbonium ion and carbanion.
Q10. The role of catalyst in a chemical reaction is to change the
Answer : Option D
Explaination / Solution:
Role of catalyst is to decrease the activation energy of reaction.
