EAMCET Model Questions

EAMCET Botany Model Questions and Answers

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1) In dicotyledonous plants tap root develops from which of the following part
1. Endosperm 2. Perisperm 3. Radicle 4. Plumule

2) The stored food material in tuberous roots of Betavulgaris is
1. Starch 2. Glycogen 3. Inulin 4. Sugars

3) Which of the following type of roots show negatively geotropismà
1. Tuberous roots 2. Respiratory roots
3. Velamen roots 4. Nodular roots

4) Which of the following type of roots absorb moisture from the atmosphere?
1) Velamen roots 2) Nodular roots
3) Tuberous roots 4) Balancing roots

5) The type of roots which can absorb the food and required nutrients from vascular bundles of the host areà
1. Clinging roots 2. Haustoria
3. Assimilatory roots 4. Pnematophores

6) Assertion (A) : Respiratory roots are found in Rhizophora.
Reason (R): Rhizophora is an epiphyte
1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true and R is not the correct explanation of A.
3. A is true but R is false.
4. A is false but R is true

7) Leg-haemoglobin pigment is associated with
1. Nodular roots 2. Epiphytic roots
3. Photosynthetic roots 4. Parasitic roots

8) Study the following Lists:
List – 1 List – 2
[Root modifications] [Examples]
A. Complete stem parasite I. Avicennia
B. Incomplete root parasite II. Arachis
C. Respiratory roots III. Cuscuta
D. Nodular roots IV. Striga
V. Vanda
The correct match is:
A B C D
1. IV, V, III, II
2. III, IV, I, II
3. V, II, III, IV
4. II, IV, V, I

9) Which of the following pair is characterised by the presence of Velamen roots and Incomplete stem parasite
1. Vanda, Dolichos 2. Cuscuta, Arachis
3. Vanda, Viscum 4. Cuscuta, Dolichos.

10) Assertion (A): Epiphytes show many xerophytic adaptations
Reason (R): They do not have a direct contact with soil and do not get continuous water supply
1. Both A and R are true and R is the correct explanation of A
2. Both A and R are true but R is not the correct explanation of A
3. A is true but R is false
4. A is false but R is true

11) Identify the assimilatory roots from the following.
I. Rhizophora II. Taeniophyllum III. Trapa IV. Arachis.
1. I and II only
2. II and III only
3. I and III only
4. II and IV only

12) Identify the Parasitic Plants from the following
I. Hydrilla II. Tobacco III. Orobanche IV. Balanophora
1. I and IV only
2. II and III only
3. I and II only
4. III and IV only

13) Assertion (A): Root hairs are Unicellular and Originate exogenously.
Reason (R): They are formed from Pericycle.
1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true and R is not the correct explanation of A.
3. A is true but R is false
4. A is false but R is true.

14) Assertion (A): Roots are not well developed in Hydrilla
Reason (R): It can absorb water directly through the
epidermis
1. A and R are true. R is the correct explanation of A
2. A and R are true. R is the not correct explanation of A
3. A is true but R is false
4. A is false but R is true

15) Rootless hydrophytes among the following are
1. Raphanus and Dacus
2. Vanda and Rhizophora
3. Rhizophora and Jussiae
4. Wolffia and Utricularia

16) Assertion (A): Jussiae is an free floating hydrophyte which bears aerial spongy and porous roots.
Reason (R): They act as breathing roots apart from helping the plant to float on the water.
1. A and R are true. R is the correct explanation of A.
2. A and R are true. R is the not correct explanation of A.
3. A is true but R is false.
4. A is false but R is true.

17) A single tuberous root is found at each node seen inv°
1. Vanda 2. Asparagus 3. Ipomea botatus 4. Taeniophyllum

18) Plants takes shelter on the branches of big trees to obtain more sunlight are calledáèπ
1. Epiphytes 2. Mangroves 3. Hydrophytes 4. Xerophytes

19) Assertion (A): Root Crops are harvested at the end of first year.
Reason (R): They store the food materials in the roots during first year of their growth and in the second year they utilise the food materials for producing flowers, fruits and seeds.
1. A and R are true. R is the correct explanation of A.
2. A and R are true. R is not the correct explanation of A.
3. A is true but R is false.
4. A is false but R is true.

20) Rafflesia bears the biggest flower in the plant kingdom, which is a
1. Complete stem parasite
2. Incomplete stem parasite
3. Complete root parasite
4. Incomplete root parasite

KEY : 1.3 2.4 3.2 4.1 5.2 6.3 7.1 8.2 9.3 10.1 11.2 12.4 13.3 14.1
15.4 16.1 17.3 18.1 19.1 20.3

EAMCET Chemistry Important Questions with Answers

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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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