Chemistry - Online Test
Q1. The geometry of amines is
Answer : Option D
Explaination / Solution:
An amine molecule has the shape of a somewhat flattened triangular pyramid, with the nitrogen atom at the apex. An unshared electron pair is localized above the nitrogen atom.
Q2. represents
Answer : Option B
Explaination / Solution:
This is redox couple.
Where following reaction take place :
Zn2+ + 2e- Zn
Q3. Point defect is also known as
Answer : Option D
Explaination / Solution:
Point defect is zero dimensional defect.
Q4. The copolymerisation of 1, 3 – butadiene and acrylonitrile
Answer : Option C
Explaination / Solution:
Copolymerisation of 1,3 butadiene and acrylonitrile gives Buna N.
Q5. Formula of oleum is
Answer : Option B
Explaination / Solution:
Oleum is pyrosulphuric acid (H2S2O7 )
Q6. The lattice enthalpy of an ionic compound is the
Answer : Option A
Explaination / Solution:
The lattice enthalpy of an ionic compound is the enthalpy change which occurs when one mole of an ionic compound dissociates into its ions in gaseous state.
Q7. What is the temperature of zone of slag formation?
Answer : Option D
Explaination / Solution:
Slag is formed in the temperature range 1000-1300 oC
Q8. d-Block Elements are characterized by the
Answer : Option B
Explaination / Solution:
d-Block elements also known as transition elements are characterized by the filling of inner d orbitals by electrons before the valence-shell s orbital.
Q9. spin quantum number with two spin states of the electron represented by two arrows, ↑ (spin up) and ↓ (spin down) was introduced to account for
Answer : Option C
Explaination / Solution:
In 1920, Otto Stern and Walter Gerlach designed an experiment, which unintentionally led to the discovery that electrons have their own individual, continuous spin even as they move along their orbital of an atom. The experiment mentioned above by Otto Stern and Walter Gerlach was done with silver which was put in an oven and vaporized. The result was that silver atoms formed a beam that passed through a magnetic field in which it split in two.
Q10. Ozone hole is :
Answer : Option A
Explaination / Solution:
Ozone hole is the depletion of ozone layer in the stratosphere caused by some pollutants that react with ozone to convert it into other form, decreasing the thickness of the ozone layer there which is called as the "hole".
