20 Questions
What is oxidation state?
Imaginary charge left on the atom when all other atoms of the compound have been removed in their usual oxidation states.
In the reaction 4 Fe + 3O2 → 2 Fe2O3, which element gets oxidized?
Iron
In the reaction H2S + Cl2 → 2 HCl + S, which species gets reduced?
Hydrogen
What is the oxidation state of a free element?
Zero
What is the oxidation state of a monatomic ion?
Equal to the net charge on the ion
In the reaction S + H2 → H2S, what type of reaction is it?
Reduction reaction
What is Heisenberg's uncertainty principle, and how does it impact the measurement of position and momentum of a microscopic particle?
Heisenberg's uncertainty principle states that the more accurately we know the position of a particle, the less accurately we can know its momentum, and vice versa. This uncertainty in measurement is significant for microscopic particles like electrons.
Explain why classical mechanics fails to explain the motion of microscopic particles like electrons.
Classical mechanics does not consider the dual nature of matter, which is significant for microscopic particles. Additionally, classical mechanics relies on precise measurements of position and momentum, which is limited by Heisenberg's uncertainty principle for microscopic particles.
What is the significance of the time-independent Schrödinger wave equation in quantum mechanics?
The time-independent Schrödinger wave equation can be solved for certain values of total energy (E), leading to quantized energy levels in the system. The permitted total energy values are called eigenvalues, and the corresponding wave functions represent atomic orbitals.
What are some career options available for chemical scientists?
Posts in central government, teaching related jobs, all industries related jobs, technicians in imaging labs, patent law jobs, industrial safety and hazards management
Name some of the Indian Institutes offering engineering and technical programs.
Indian Institutes of Information Technology (IIITs), Indian Institute of Engineering Science and Technology (IIEST), National Institutes of Technology (NITs), Indian Institute of Technology (IITs), Government Funded Technical Institutes (GFTIs), Birla Institute of Technology and Science (BITS)
What are the two papers in JEE-Main and JEE-Advanced exams?
Paper I and Paper II
What is the duration of Paper I in JEE-Main and JEE-Advanced exams?
3 hours
What is the qualification required to appear for JEE-Advanced exam?
Qualify JEE Main (Paper-I)
What is the reduction half-reaction in acid medium for the given compound?
Cr2O72- + 14H+ +6e- → 2 Cr3+ +7H2O
If an organic compound present in vinegar has 40% carbon, 6.6% hydrogen, and 53.4% oxygen, what is the empirical formula of the compound?
CH2O
How do you find the relative number of moles of various elements in a compound?
Divide the mass of each element by its atomic mass.
What is the simplest ratio in whole numbers for an organic compound with percentage composition C=54.55%, H=9.09%, O=36.36%?
CH2O
In the analysis of a compound, if it gives C=40%, H=6.6%, O=53.4%, what is the empirical formula of the compound?
CH2O
What is the process to convert non-whole number ratios into whole numbers in determining the empirical formula?
Multiply by a suitable smallest number.
Learn how to balance a reduction half-reaction in acid medium using the example of Cr2O72- + 14H+ +6e- → 2 Cr3+ +7H2O. Practice determining the simplest ratio of elements when the composition is expressed in percentage. This quiz is suitable for 11th-grade Chemistry students.
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