CBSE 12TH CHEMISTRY - Online Test
Q1. Which of the following acids does not exhibit optical isomerism?
Answer : Option D
Explaination / Solution:
Maleic Acid shows Geometrical Isomerism but does not give optical isomerism.
Q2. The artificial sweetener stable at high temperature is
Answer : Option C
Explaination / Solution:
Sucralose is non nutritive artificial sweetner.
Q3. In the formation of complex entity, the central atom/ion acts as
Answer : Option A
Explaination / Solution:
Central Metal ion behave as a Lewis Acid while Ligand act as a lewis Base.
Q4. Correct arrangement of Al, Cu, Fe, Mg and Zn in the order in which they displace each other from the solution of their salts is
Answer : Option B
Explaination / Solution:
Reactivity series.
Q5. Grignard reagent should be prepared under anhydrous conditions because
Answer : Option C
Explaination / Solution:
R—MgX is very reactive.
Q6. Collision theory is applicable to
Answer : Option C
Explaination / Solution:
Collision theory is only applicable to bimolecular reaction.
Q7. Adsorbent used for drying of air and controlling humidity in rooms is
Answer : Option A
Explaination / Solution:
Aluminia gel adsorbs humidity in air.
Q8. Enzymes are used in the reaction as they are
Answer : Option A
Explaination / Solution:
Enzymes are bio catalyst
Q9. The reaction in Q No.26,phenols are
Answer : Option B
Explaination / Solution:
Phenols are bronsted acids (proton donor). –OH is polar.
Q10. Amalgam of mercury with sodium is an example of
Answer : Option B
Explaination / Solution:
Solute is mercury( liquid) and solvent is sodium.
