EAMCET Practice Session – Page 2

1. Which of the following vertebrates can’t receive air borne sounds?
A) Flightless birds
B) Blind worms
C) Monotremes
D) Newts
1) Both B and C
2) Both C and D
3) Both A and C
4) Both B and D

2. The taxa of systematics hierarchy given by Linnaeus are-
1) Kingdom, Class, Order, Genus, Species
2) Kingdom, Phylum, Class, Order, Species
3) Kingdom, Phylum, Class, Order, Family, Genus
4) Class, Order, Family, Genus, Subspecies

3. Urochordate ancestry of vertebrates was elaborated byß
1) Garstang and Romer
2) Hyman and Haeckel
3) Berril and Romer
4) Garstang and Hyman

4. Multicellular epidermal mucus glands appeared first in-
1) Ostracoderms 2) Cyclostomes 3) Osteichthyes 4) Amphibians

5. Leopard, Wolf, Bears are described under the same taxonomic category called
1) Ursidae 2) Canidae 3) Felidae 4) Carnivora

6. Assertion(A): Physiologically Hemichordates act as bridge between non-chordates and chordates
Reason (R): In Hemichordates muscle phosphogens are both phospho creatine and phospho argenine
1) Both ‘A’ and ‘R’ are correct. ‘R’ is correct explanation for ‘A’.
2) Both ‘A’ and ‘R’ are correct but ‘R’ is not correct explanation for ‘A’.
3) ‘A’ is true but ‘R’ is false.
4) Both ‘A’ and ‘R’ are false.

7. The concept of species is NOT applicable to
1) Sexually reproducing organisms
2) Organisms which have a common ecological niche
3) Organisms which have similar structural and functional characteristics
4) Asexually reproducing organisms

8. Read the following.
I) Endostyle of chordates is evolved from adoral band clia of Auricularia.
II) Circumoral ciliary bands of Auricularia are modified into dorsal nerve cord of chordates.
III) Auricularia undergone neoteny to form early chordate Some of the above are related to the Origin of Chordates explained by Garstang.
Choose the correct
1) I & II 2) II & III 3) I & III 4) I, II, III

9. Taxonomic categories of human are given below
A) Gnathostomata
B) Eutheria
C) Deuterostomia
D) Enterocoelomata
E) Hominoidea
F) Anthropoidea
Choose the correct descending sequence.
1) CDBAFE 2) EFBADC 3) BADCFE 4) CDABFE

10. Assertion (A): Urochordate ancestry of chordates states that sessile adult stage of tunicates is evolved into free swimming
adult
Reason (R): Larvae of tunicates underwent neoteny and produced free swimming paedomorphic adult
1) Both ‘A’ and ‘R’ are correct but ‘R’ is not correct explanation
for ‘A’
2) A is true but R is false
3) Both ‘A’ and ‘R’ are correct. R is correct explanation for A
4) Both ‘A’ and ‘R’ are false

11. Read the following
KINGDOM INTRODUCED BY CHARACTERISTICS
A) Monera Copeland Unicellular, Prokaryotes
B) Protista Huxley Unicellular, Eukaryotes
C) Fungi Whittaker Haploid multicellular saprobes
D) Animalia Linnaeus Only multicellular heterotrophs
Choose the correct combinations
1) A & C 2) B & D
3) C & D 4) A & D

12. In chordates, which of the following show the origin from two primary germ layers?
1) Nerve cord 2) Notochord 3) Gill slits 4) Endostyle

13. Read the following statements
1) Middle ear osscicle of amphibians is columella auris
II) Columella auris is modified hyomandibula of hyoid arch of fishes
III) Tympanum is present in all living amphibians
Which of the above is Incorrect?
1) II 2) III 3) both I & II 4) both II & III

14. Urochordates without atrium and atrial aperture
1) Ascidians 2) Lancelets 3) Thaliaceans 4) Appendicularians

15. Match the following
LIST – I LIST – II
A) Herbert Spencer I) Origin of Species
B) Darwin II) Inheritance laws
C) Mendal III) Evolution
D) Bateson IV) Historia Generalis
Plantarum
E) Jonh Ray V) Genetics
Correct match is
1) A-III, B-I, C-V, D-II, E-IV
2) A-V, B-III, C-II, D-I, E-IV
3) A-IV, B-III, C-II, D-I, E-V
4) A-III, B-I, C-II, D-V, E-IV

16. The first vertebrates are
1) bony fishes
2) lobe-finned fishes
3) jawless fishes
4) elasmobranchs

17. Following are some stages that appeared in the evolution of Acorn worms.
A) Sessile arm-feeder
B) Pterobranchs
C) Hemichordates
D) Modern tunicates
E) Gill filter feeding
F) Primitive echinoderms
Arrange them in correct sequence
1) A, E, C 2) A, B, E, C
3) A, F, D, C 4) A, D, B, C

18. The jaws of vertebrates are evolved from
1) Hyoid arch 2) Mandibular arch
3) Last visceral arch 4) Hyomandibula

19. In which of the following body cavity is present between mesoderm and gut?
1) Chordata 2) Platyhelminthes 3) Nematoda 4) Annelida

ANSWERS : 1-4, 2-1, 3-3, 4-4, 5-4, 6-1, 7-4, 8-3, 9-4, 10-3, 11-1, 12-3, 13-2, 14-4, 15-4, 16-3, 17-1, 18-2, 19-3.

1) Aqueous solution of NH4X is acidic in nature, ‘X’ would not be
1) OH 2) Cl 3)Br 4) I

2) The molarity of 20% (W/W) NaOH solution is 5M. The density of the solution is —— g/ml.
1) 0.5 2) 0.25 3) 1.0 4) 2.0

3) The freezing point of equimolal aqueous solutions will be highest for
1) C6H12O6 2) NaCl 3) MgCl2 4) Al2(SO4)3

4) Which of the following when added to ammonia buffer brings about greater change in its pH
1) HCl 2) NaOH 3) Water 4) NH4OH

5) At 300 K the solute in 0.1M K4 [fe(CN)6] solution is 100% ionised. The osmotic pressure of the solution is
1) 12.3 atm 2) 14.778 atm 3) 21.01 atm 4) 0.7389 atm

6) The value of hydrolysis constant of Sodium acetate is (Ka of acetic acid is 2 × 10-5)
1) 5 × 10-9 2) 5 × 10-10 3) 2 × 10-9 4) 2 × 10-10

7) The pH of a buffer solution changes by 0.1 unit on the addition of 4 grams of NaOH. The buffer capacity is
1) 2 2) 4 3) 3 4) 5

8) Both the cation and the anion interact with water in the aqueous solution of the following salt
1) HCOOK 2) NH4Cl 3) CH3COONH4 4) CSI

9) 100 ml of solution contains 34.2 gm of Aluminium sulphate. The molarity of the solution is
1) 6M 2) 8M 3) 1 M 4) 0.6M

10) When HCl gas is passed through NaCl saturated solution, NaCl is precipitated. This is due to
1) Common ion effect 2) Solution process
11) ‘x’ g Na2CO3 is present in 100 ml ‘y’ M Na2CO3 solution. The ratio of x and y is
1) 10.6 2) 1.06 3) 5.3 4) 0.53

12) The molality and molarity of an agueous solution are 1.0 m and
0.75 M respectively. The weight of solvent present in 10ml of that solution is
1) 7.5 g 2) 0.75 g 3) 75 g 4) 750 g

13) For an aqueous solution density is less than 1g/ ml. The relation between its molarity (M) and molality (m) is
1) M = m 2) m > M 3) m < M 4) m < < M 14) At certain high temperature TK, pH of 0.05 M Ba(OH)2 is 11.6990. At TK, ionic product of water is 1) 10-14 M2 2) 10-13 M2 3) 2 × 10-14 M2 4) 4 × 10-14 M2 15) Read the following statements I) For the Salt Ag2 S3Ksp = 108S5 II) Among IIA Group hydroxides Be(OH)2 has lowest Ksp at 25oC III) The Molar solubility of PbI2 in 0.2 M Pb(NO3)2 solution interms of ‘Ksp’ is (Ksp/0.8)1/2 1) All 2) I, II 3) III only 4) II, III 16) When equal volumes of following solutions are mixed, then precipitation of AgCl will occur only with (Ksp of Agcl = 1.8 × 10-10) 1) 10-4M Ag+1 and 10-4 MCl- 2) 10-5M Ag+1 and 10-5MCl- 3) 10-6M Ag+1 and 10-6MCl- 4) 10-10M Ag+1 and 10-10MCl- 17) A small amount of HCl, is added to a butter containing acitic acid and sodium acetate. Which of the following reaction is responsible for constant pH of the solution? 1) CH3COOH ←→ CH3COO- + H+ 2) CH3COONa → CH3COO- + Na+ 3) CH3COO- + H+ → CH3COOH 4) H+ + OH- ←→ H2O 18) Which of the following 0.1 M solutions will have lowest pH? 1) CH3COOH 2) HCl 3) NH4OH 4) KOH 19) ‘X’ L of 10N HCl and ‘Y’ L of 2M HCl are mixed. Molarity of resultant solution is ‘Z’. X, Y and Z are respectively. 1) 1.5, 2.5, 3.5 2) 5, 10, 5 3) 6, 6, 6 4) 2.5, 1.5, 5 20) Which of the following are not correct A) Cl- is a Lewis acid B) pH of 10-3M HCl is 3 C) In acid solution pH < POH D) Bronsted - Lowry theory fails to explain basic nature of NH3 1) A, B 2) B, C 3) A, D 4) B, D. KEY : 1.1 2.3 3.1 4.4 5.1 6.2 7.2 8.3 9.3 10.1 11.1 12.1 13.2 14.3 15.1 16.1 17.3 18.2 19.3 20.3.

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