Question

Unit I SOME BASIC CONCEPTS OF CHEMISTRY

1 mark question

1. What is the number of significant figures in 0.001620"
2. Calculate the percentage of nitrogen in NH,

3. Calculate molecular mass of C6H12O6 molecule.

4. State the law of multiple proportion.

5. How many atoms of Calcium are there in 2g of Ca?

2 marks Question:

6. Define element, compound and mixture.

7. Define Gay Lussac's law of gaseous volumes. Explain with one suitable example.

8. An organo metallic compound on analysis was found to contain C=64.4\% , H-5.5%
Fe=29.9\% Determine its empirical formula. (At mass of Fe=564)

9. What volume of 6M Hel and 2MHel should be mixed to get two litres of 3M Hel?

3 or more marks

10. If 20.0 g of CaCO, is treated with 20.0 g of HCl, how many grams of CO₂ can be

generated according to the following equation:

CaCO + 2HCl(a) CaCl2 + H₂O + CO2(g)

11. Concentrated H₂SO4 is 98% weight and has density 1.84 g cm³. What volume of
concentrated acid is required to make 5.0 L of 0.50 M H₂SO4 solution?

Unit 2 Structure of Atom
I mark question.

1. What is the physical significance of si and si²

2. Write electronic configuration of Cu" and Cr³.
3. What is the shape of s-orbital and p-orbital

4. An atomic orbital has n=3 , what are the possible values of 1?

5. State Hund,s rule of maximum multiplicity. Illustrate with an example.

6. State Pauli Exclusion Principle.

7. How many unpaired electrons are present in N? Name the principle which explains the

presence of these unpaired electrons

2 or more marks Question:

8. Write a short note on Plank's Quantum theory.

9. Calculate the wavelength of an electron that has been accelerated in a particle accelerator

through a potential difference of 100 million volts.
10. How does Heisenburg's uncertainty principle support concept of orbital?

11. Calculate the uncertainty in position of dust particle with mass equal to 1 mg if the
uncertainty in velocity is 5.5 x 100 ms (h= 6.626¹10³JS)

12. Establish a relation between wavelength of a moving particle and its kinetic energy. The
wave length of a moving particle of mass 1.0 x 10 Kg is 3.312 x 10 m. calculate its
kinetic energy.(h= 6.625*10JS)

and

Answer 1

Fertilization can be defined as the union of two haploid gametes, the spermatozoa and the oocyte, hereto referred to as egg, to restore the diploid state, form a zygote through the process of egg activation, and commence a series of mitotic divisions that results in cell differentiation and embryo development.