Chemistry - Online Test
Q1. What is the best description of the change that occurs when is dissolved in water?
Answer : Option C
Explaination / Solution:
Oxide ion donates a pair of electrons
Q2. When chlorine is passed through concentrated hot solution of KOH, the compound formed is
Q3. The electron releasing tendency of the metals, zinc, copper and silver is in the order:
Answer : Option A
Explaination / Solution:
The electron releasing tendency of the metals, zinc, copper and silver is in the order Zn>Cu>Ag
This is according to the metal activity series or electrochemical series.
Q4. One of the following is used in speciality packaging, orthopaedic devices and in controlled release of drugs
Answer : Option A
Explaination / Solution:
PHBV is used in speciality packaging.
Q5. A transition metal ion exists in its highest oxidation state. It is expected to behave as
Answer : Option B
Explaination / Solution:
If the metal is at its highest oxidation state, then it will have no desire to loose more electrons. It will have the tendency to gain electron, and go to a lower oxidation state, i. e. it behaves like an oxidizing agent.
Q6. Which of the following statements is not true about classical smog?
Answer : Option B
Explaination / Solution:
Classical smog main components are not produced by the action of sunlight on emissions of automobiles and factories. It is actually the photochemical smog.
Q7. The atom with the given atomic number Z=17, and the atomic mass A=35.5 is
Answer : Option B
Explaination / Solution:
Here l = 3 means the sub shell is f and
n = 4 means it is present in 4th orbit. Finally it is a 4f sub shell.
The no of orbital in f sub shell =2l+1=2×3+1=7
Each orbital can accommodate 2 electrons. 7×2=14 electrons.
Maximum number of electrons in a sub shell with l=3 and n=4 (4f) is 14 electrons.
Q8. The catalyst used in Deacon’s process is
Answer : Option A
Explaination / Solution:
CuCl2 is used as catalyst in Decon’s Process.
Q9. behaves as a bleaching agent because:
Answer : Option C
Explaination / Solution:
Because it can undergo bond dissociation randomly in presence of light. It dissociates and generates free radicals which is very reactive and acts like bleaching agent.
Q10. The IUPAC name of AlCl3.4(EtOH) is
Answer : Option D
Explaination / Solution:
This is double salt so name is written in sequential manner.
