CBSE 12TH CHEMISTRY - Online Test
Q1. Drug inhibits the enzymatic action by attaching itself to allosteric site, which is
Answer : Option A
Explaination / Solution:
Allosteric site is site on enzyme apart from active site where inhibitors attach.
Q2. Which is used in cancer therapy?
Answer : Option A
Explaination / Solution:
Cis Platin ( cis – [Pt(NH3)2(Cl)2] ) is a anti cancer drug.
Q3.
Emf of the cell
at 298 K is
at 298 K is
Answer : Option D
Explaination / Solution:
Q4. Isomers of the compoundC4H9Br are
Answer : Option A
Explaination / Solution:
Q5. The metabolism of hormones in human body is an example of
Answer : Option C
Explaination / Solution:
It is pseudo first order reaction.
Q6. When 50 mL of 1M oxalic acid is mixed with 0.5 g of wood charcoal, the final concentration of the solution after adsorption is 0.5 M. The amount of the oxalic acid adsorbed per gram of charcoal is
Answer : Option A
Explaination / Solution:
Amount of oxalic acid adsorbed = (0.5x50)/1000 Mass of oxalic acid adsorbed per gram of charcoal = (0.0025x126)/0.5
Q7. Amylase is secreted by
Answer : Option C
Explaination / Solution:
Amylase is given by salivary amylase enzyme in saliva.
Q8. An organic compound containing oxygen, upon oxidation forms a carboxylic acid as the only organic product with its molecular mass higher by 14 units. The organic compound is ______.
Answer : Option A
Explaination / Solution:
When –CH2OH group is replaced by –COOH group then only molecular wt will increase by 14units.
Q9. The type of intermolecular interaction present in n-Hexane and n-Octane is
Answer : Option C
Explaination / Solution:
Both are Non Polar.
Q10. The nitrogen atom of trimethylamine is __________ hybridized which is reflected in the CNC bond angle of __________.
Answer : Option B
Explaination / Solution:
has Td geometry
