Chemistry - Online Test
Q1. Nature of binding forces present in carbondioxide molecules in solid state are
Answer : Option D
Explaination / Solution:
O=C=O<−>−O−C+=O
Q2. Some of the polynuclear hydrocarbons having fused benzene ring system have the property of being
Answer : Option D
Explaination / Solution:
Polynuclear hydrocarbons are carcinogenic,i.e. cancer producing
Q3. Which among the following ores are not found on earth’s crust?
Answer : Option C
Explaination / Solution:
Nitrides are not found in Earth crust.
Q4. A thermodynamic state function is a physical quantity
Answer : Option B
Explaination / Solution:
State function is one which is only dependent on initial and final state of the system and is independent of the path by which that change has occurred.
Q5. Select the species which are iso-electronic (same number of electron) with each other.
Answer : Option A
Explaination / Solution:
Neutral Cl ( Z=17) has 17 electrons and with the addition of one more electron it becomes Cl- anion which has 18 electrons.
Neutral Ca (Z=20) has 20 electron and with the removal of 2 electrons it becomes Ca2+ cation which has 18 electrons.
Since Cl- and Ca2+ both has 18 electrons , so they are isoelectronic.
Q6. PHBV is developed because :
Answer : Option D
Explaination / Solution:
PHBV is used to reduce accumulation of the synthetic solid polymer waste.
Q7. Oil drop experiment is for determining the
Answer : Option B
Explaination / Solution:
The oil drop experiment was performed by Robert A. Millikan and Harvey Fletcher in 1909 to measure the elementary electric charge (the charge of the electron). The experiment entailed observing tiny electrically charged droplets of oil located between two parallel metal surfaces, forming the plates of a capacitor.
Q8. Metathesis is developed by :
Answer : Option C
Explaination / Solution:
Yves Chauvin, Robert H. Grubbs and Richard R Schrock won the noble prize in 2005 for designing the method of metathesis.
Q9. Silver is refined by cupellation process. The process removes the impurity of
Answer : Option D
Explaination / Solution:
Cupellation removes the impurity of Pb.
Q10. An ice cube floats on water because
Answer : Option D
Explaination / Solution:
Due to cage like structure of ice , for same mass of water and ice. Volume of ice is greater than that of water therefore density of ice is less than that of water.
