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21/06/2020 CF-OYM

Regd. Office : Aakash Tower, 8, Pusa Road, New Delhi-110005, Ph.011-47623456

MM : 45 iTutor Fortnightly Test Series Time : 90 min. (for NEET-2021)

Subjective Test –1 (H.A.)

Topics covered : Physics : Electric Charges and Field, Electrostatic potential and Capacitance: Electrostatic potential

energy, Electric potential due to a point charge and a short dipole. Chemistry : Solid State, Solutions Biology : Reproduction in Organisms, Sexual Reproduction in Flowering Plants, Reproduction in

Organisms, Human Reproduction

PHYSICS Q1. The electric potential at a point P due to a point charge of 4 × 10–7 C located 9 cm away will be [1] (1) 9 × 103 V (2) 4 × 104 V (3) 9 × 104 V (4) 2 × 104 V Q2. Name the physical quantity whose S.I unit J/C. Is it a scalar or vector quantity? [1] Q3. Electrostatic field lines ___________ form any close loops. [1] Q4. Derive the expression for the electric potential at a point in the axial position of an electric dipole [2] Q5. Derive the relation of electric field, due to large thin sheet of charge having surface charge density σ,

by using Gauss’s law. [2]

Q6. (a) Write relation for torque acting on an electric dipole of dipole moment

P placed in uniform electric field .E

Express it in vector form and point out the direction along which it act. [2] (b) What will happen if the field is non-uniform? [1]

OR A hollow cylindrical box of length 1 m and area of cross-section 25 cm2 is placed in a three dimensional

co-ordinate system as shown in the figure. The electric field in the region is given by 50=

E xi where E is in N/C and x is in metres

(a) Find net flux through the cylinder [2] (b) Find charge enclosed by the cylinder [1]

OYMG1 Code-A

One Year Medical-2021 iTutor Subjective Test-01 (OYMG1) Code-A

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Q7. Derive the expression of potential due an electric dipole at any point P, at distance r, making an angle θ with dipole moment. Also deduce the expression for axial and equatorial point. [5]

OR

(a) Consider a system of n charges q1 q2 ………qn with position vectors 1 2 3, , , ..... nr r r r

relative to some origin.

Deduce the expression for net electric field E

at a point P with position vector

Pr due to the system of

charges [3]

(b) Two concentric metallic spherical shells of radius R and 2R are given charge Q1 and Q2 respectively. The surface charge density on the outer surfaces of shells are equal. Determine the ratio Q1 : Q2 [2]

CHEMISTRY

Q8. Give one example of each molecular solid and ionic solid. [1]

Q9. The mole fraction of glucose in its aqueous solution having 755 mm of Hg vapour pressure at 373K is [1]

(VP of H2O at 100°C = 760 mm of Hg)

(1) 1150

(2) 1151

(3) 1155

(4) 1152

Q10. Calculate the packing efficiency of a metal for a body centred cubic lattice. [2]

Q11. What is van’t Hoff factor? What types of values can it have if in forming the solution the solute molecules undergo? [2]

(i) Dissociation

(ii) Association

Q12. (a) An element with molar mass 27 g mol–1 forms a cubic unit cell with edge length 4.05 × 10–8 cm. If the density is 2.7 g cm–3, what is the nature of the cubic unit cell? [3]

(b) Define primitive unit cells [1]

OR

(a) Explain the following with suitable examples [3]

(i) Metal excess defect

(ii) Metal deficiency defect

(b) AgCl shows Frenkel defect while NaCl does not. Why? [1]

Q13. (a) The vapour pressure of pure liquids A and B are 450 and 700 mm of Hg respectively at 350 K. Find out the composition of the liquid mixture if total vapour pressure is 600 mm Hg. Also find the composition of vapour phase [3]

(b) Calculate the elevation of boiling point for a solution prepared by adding 10 g urea to 200 g of water. (Kb for water = 0.52 K kg mol–1, molar mass of urea = 60 g mol–1) [2]

OR

iTutor Subjective Test-01 (OYMG1) Code-A One Year Medical-2021

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(a) Define the terms osmosis and osmotic pressure. Is the osmotic pressure of a solution a colligative property? Explain. [3]

(b) Calculate the molality of 10% (w/w) aqueous solution of NaOH? (Molar mass of NaOH = 40 g mol–1) [2]

BIOLOGY

Q14. Which amongst the following is/are monocarpic plant(s)? [1]

(a) Apple

(b) Carrot

(c) Radish

(d) Bambusa tulda

(1) (a), (c) & (d) (2) (b), (c) & (d) (3) (b) & (c) only (4) (b) & (d) only

Q15. Select the animal which does not undergo oestrous cycle? [1] (1) Cow (2) Sheep (3) Deer (4) Monkey

Q16. (a) Name the innermost layer of anther wall and also mention its function. [1] (b) Of which material the exine of pollen grain is made up of? What is its characteristic? [1]

OR

(a) Write the location and function of Sertoli cells in humans. [1] (b) When does oogenesis begin? [1] Q17. (a) What are zygotes? Where are they formed? [1] (b) Give any four differences between zoospore and zygote. [1]

(c) Which is the most vital event of sexual reproduction? What does it result into? [1] Q18. (a) How is placenta formed in the human female? [1] (b) Name any two hormones which are secreted by placenta and are also present in a non-pregnant

woman? [1]

(c) Draw a diagram of Graafian follicle and label antrum and secondary oocyte. [1] Q19. (a) With the help of labelled diagram describe the structure of a typical dicot embryo. [2] (b) Describe different modes of development of endosperm in angiosperms with one example each. [2]

(c) What are albuminous seeds? Give two examples of such seeds. [1] OR

Explain the following phases with the help of suitable diagram of menstrual cycle in a human female.

(a) Menstrual phase

(b) Follicular phase

(c) Luteal phase [2+1+1+1]

Edition: 2020-21