Chemistry - Online Test
Q1. Electrolytic cell is a device for using electrical energy to carry
Answer : Option C
Explaination / Solution:
Electrolytic cell converts non spontaneous chemical reaction to electrical energy using electricity.
Q2. Stable outer octet of electrons is achieved in chlorine atom during the formation of NaCl by:
Answer : Option D
Explaination / Solution:
Na lose its one electron forming Na+ while Cl gains the electron formimg Cl-
Q3. Which of the following is the correct IUPAC name?
Answer : Option A
Explaination / Solution:
While writing IUPAC name, alkyl groups are written in alphabetical order. thus lower locant 3 is assigned to ethyl. prefix di, tri or tetra are not included in alphabetical order
Q4.
Oxidation and reduction always occur simultaneously, hence, the word “redox” was coined for this class of chemical reactions. In the following redox reaction, identify the species undergoing oxidation and reduction:
Answer : Option C
Explaination / Solution:
In the above reaction oxygen is transferred from Fe3O4 to Al, so Fe3O4 is reduced while Al is oxidised.
As per definition of oxidation and reduction , loss of oxygen i.e reduction occurs in Fe3O4 and gain of oxygen i.e Oxidation occurs in Al.
Q5. Group IlA of the periodic table consists of the six elements are collectively known as
Answer : Option A
Explaination / Solution:
because their oxide and hydroxide are alkaline in nature and these metal oxide are found in earth's crust
Q6. In a homogeneous mixture,the components are
Answer : Option D
Explaination / Solution:
In a homogeneous mixture ,
(i) the components are mixed together completely ,
(ii) has a uniform composition throughout.
Q7. The reaction RX + 2Na + RX _______________? R – R + 2NaX is called.
Answer : Option A
Explaination / Solution:
This name reaction wurtz reaction.when 2 moles alkyl halide reacts with sodium then it is called wurtz reaction.
Q8. The following compound can be called as
Answer : Option B
Explaination / Solution:
It is dextrotatory , as second last hydroxy group is in right position.
Q9. The rate of reaction can be measured as
Answer : Option B
Explaination / Solution:
Rate of reaction can be measured in terms of Rate of disappearance of reactant or rate of apperance of product.
Q10. The activity of the iron catalyst used in Haber’s process is adversely affected due to presence of
Answer : Option D
Explaination / Solution:
CO act as a poison for Fe.
