CBSE 12TH CHEMISTRY - Online Test
Q1. Which of the following methods is based on distribution law?
Answer : Option B
Explaination / Solution:
Parkes process is a process for removing silver from Pb. It is an example of Liquid liquid extraction.s
Q2.
Identify the product in the reaction
Answer : Option A
Explaination / Solution:
Q3. Nutritive value is imparted to the food by
Answer : Option C
Explaination / Solution:
None of above impart nutritive value to food.
Q4. Which of the following species is expected to be colourless?
Answer : Option C
Explaination / Solution:
Ti is in d0 state so no d - d transition.
Q5. Emf of the cell
at 298 K is
at 298 K is
Answer : Option B
Explaination / Solution:
Q6. For alkanes containing odd number of carbon atoms, Wurtz reaction is not preferred. Because
Answer : Option C
Explaination / Solution:
In wurtz reaction many side products are formens whwn two different alkyl halides are used.
Q7. Rate of reaction does not remain constant throughout because
Answer : Option C
Explaination / Solution:
Rate of reaction is dependent on concentration of reactant
Q8. Which catalyst is used in Haber’s process?
Q9. The enzyme which dissolved blook clot is.
Answer : Option C
Explaination / Solution:
Streptokinase enzyme help in dissolving blood clot.
Q10. Alcoholic compounds react
Answer : Option D
Explaination / Solution:
The functional group of the alcohols is the hydroxyl group, –OH. Unlike the alkyl halides, this group has two reactive covalent bonds, the C–O bond and the O–H bond. The electronegativity of oxygen is substantially greater than that of carbon and hydrogen. Consequently, the covalent bonds of this functional group are polarized so that oxygen is electron rich and both carbon and hydrogen are electrophilic.
