Chemistry - Online Test
Q1. The process of converting alkyl halides into alcohols involves_____________.
Answer : Option D
Explaination / Solution:
Alkyl halides are converted into alcohols by substitution reaction. When alkyl halides are treated with aqueous KOH, alcohols are formed. This is a nucleophilic substitution reaction.
Q2. An aqueous solution of methanol and water has vapour pressure
Answer : Option A
Explaination / Solution:
They show positive deviation.
Q3.
E0 values of some redox couples are given below. On the basis of these values choose the correct option.
E0 values: Br2/Br- = +1.90; Ag+/Ag = +0.80; Cu2+/Cu = +0.34; I2/I-(s) = +0.54
Answer : Option C
Explaination / Solution:
Because in electrochemical series Cu is above all in sequence I2, Ag and Br2, therefore, Cu will reduce Br2.
Q4. Pyridine typically undergoes________ electrophilic aromatic substitution as compared to benzene,
Answer : Option D
Explaination / Solution:
Pyridine is less reactive than benzene towards electrophilic aromatic substitution, because nitrogen is more electronegative than carbon and acts like an electron withdrawing group.
Q5. What is the mass of 1 molecule of ?
Answer : Option B
Explaination / Solution:
Since ,as per Avogadro's law ,
the mass of 6.02 x molecules of
= 32 g
mass of 1 molecule of O2
=
= 5.32 x g
Q6. At 500 K, equilibrium constant, , for the following reaction is 5.2. HI (g) What would be the equilibrium constant Kc for the reaction 2HI (g)
Answer : Option B
Explaination / Solution:
The second equation can be obtained by reversing the 1st reaction and multiplying by 2. So Here ,=5.2
Q7. Ozonolysis of an organic compound gives formaldehyde as one of the products. This confirms the presence of
Answer : Option D
Explaination / Solution:
The presence of double bond on terminal carbon will give formaldehyde as one of the products.
Q8. The distillation process is used for the purification of
Answer : Option B
Explaination / Solution:
Hg is purified by distillation.
Q9. In XeO3 and XeF6 the oxidation state of Xe is
Answer : Option C
Explaination / Solution:
Xe is oxidation state of +6.
Q10. The property of a substance to offer no resistance to the flow of electricity at a particular temperature is known as
Answer : Option D
Explaination / Solution:
Superconductors offers no resistance to flow electricity.
