CBSE 12TH CHEMISTRY - Online Test
Q1. Macromolecules are one of the following
Answer : Option A
Explaination / Solution:
Polymers are higher molecular weight macromolecules.
Q2. Elements having +5 oxidation state is
Answer : Option D
Explaination / Solution:
The maximum oxidation state shown by a p-block element is equal to
the total number of valence electrons (i.e., the sum of the s and
p-electrons).
Q3. Metals which occur in native state in nature
Answer : Option B
Explaination / Solution:
Least reactive metals are found in native state.
Q4. The f – block elements are known as
Answer : Option D
Explaination / Solution:
F block elements are known as inner transition elements.
Q5. IUPAC name of CH3CHO is
Answer : Option B
Explaination / Solution:
CH3CHO is ethanal
Q6. Which among the following is an ambidentate ligand?
Answer : Option D
Explaination / Solution:
ONO− and NO2−
Q7. The neurotransmitter that plays a role in mood swings is
Answer : Option C
Explaination / Solution:
Noraderaline is neutrotransmitter which play role in mood swings.
Q8. Electrochemistry is the study of production of electricity from
Answer : Option B
Explaination / Solution:
Electrochemistry is branch of chemistry that deals with production of electricity from a chemical reaction or carrying out a non spontaneous reaction using electricity.
Q9. The IUPAC name for tertiary butyl iodide is
Answer : Option D
Explaination / Solution:
IUPAC name of
actually
here firstly we select longest chain and it is of 3 carbon.and at
number 2 position there is iodo as well as methyl ,so its name is 2-iodo
2-methyl propane.
is 2 – Iodo 2·methyl propane
actually
here firstly we select longest chain and it is of 3 carbon.and at
number 2 position there is iodo as well as methyl ,so its name is 2-iodo
2-methyl propane.is 2 – Iodo 2·methyl propane
Q10. Carbohydrates Which taste sweet are called
Answer : Option D
Explaination / Solution:
carbohydrates like monosaccharides (one sugar molecule, example: Glucose) and disaccharides (two sugar molecule,example Sucrose I.e Table sugar) always tastes sweet.
