EAMCET

121.The order of first electron affinity of O, S and Se is
1) O > S > Se 2) S > O > Se 3) S > Se > O 4) Se > S > O
122. The presence of primary alcoholic group in glucose can be identified by
1) Oxidation to gluconic acid with Br2 water.
2) glucose reduces tollens reagent
3) glucose undergoes reversible isomerization
4) oxidation to saccharic acid with conc. HNO3

123. The correct order of carbon – carbon bond length in the following
1) C2 H6 > C2 H4 > C6 H6 > C2 H2 > 2) C2 H6 > C2 H4 > C2 H2 > C6 H6
3) C2 H6 > C6 H6 > C2 H4 > C2 H24) C6 H6 > C2 H6 > C2 H4 > C2 H2

124. Among the following, which one is the most effective protective colloid ? (Gold numbers are given in brackets)
1) Gelatin (0.005) 2) Haemoglobin (0.03)
3) Albumin (0.1) 4) Potato starch (25)

125. Matte is
1) 98 % pure copper 2) 95 % pure Zinc
3) Cu2S with little FeS 4) Iron containing 4 % carbon 4%

126. Correct statements in the following
a) Garlic odour of acetylene is due to PH3 and H2 S as impurities
b) Mustard gas is the addition product of acetylene with SCl2
c) Acetylene undergo nucleophilic addition reactions in the presence of heavier metal ions
d) On ozonolysis acetylene gives oxalic acid
1) All 2) b and d
3) b, c and d 4) a and c only

127.
In the above sequence ‘B’ is
1) Acetanilide 2) Acetophenone
3) Benzophenone 4) N- Phenyl acetamide

128. The volume of CO2 in litres liberated at STP when 3.18 gms of Na2 CO3 is treated with excess of dilute H2 SO4 is
1) 0.112 2) 0.672 3) 0.336 4) 0.448

129. The oxidation state of Nitrogen is lowest in
1) N3H 2) NH2OH 3) NH2NH2 4) NH3

130. The ratio of average kinetic energies of SO2 and O2 at 25ºC.
1) 1:1 2) 1: 2 3) 2 :1 4) 4 :1

131. 99% of a first order reaction was completed in 32 min. When will 99.9% of the reaction complete
1) 16 min 2) 32 min 3) 64 min 4) 48 min

132. A : In the hydrides of IVA group from CH4 to SnH4 reducing nature increases
R: CH4 to SnH4 thermal stability decreases as bond energy decreases
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, R is false A 4) A is false but R is true.

133. The number of three centered, 2 electron bonds in diborane is
1) 2 2) 4 3) 3 4) 6

134. In Ramsay – Rayleigh’s first method, nitrogen of air is removed in the form of
1) 2 CaCN 2) 3 2 Mg N 3) 2 3 NaNO NaNO + 4) 2 NO NO +

135. In Nalgonda technique for defluoridation of water, the chemical/s used are
1) Bleaching powder 2) Lime 3) Alum 4) All the above

136. In the conversion of aniline to acetanilide the correct order of reactivity of acetylating agents is
1) (CH3CO)2 O > CH3COOC2H5 > CH3COCl
2) CH3COOC2H5 > (CH3CO)2 O > CH3COCl
3) CH3COCl > (CH3CO)2 O > CH3COOC2H5
4) CH3COCl > CH3COOC2H5 > (CH3CO)2 O

137. The monomer of the polymer ‘Teflon’ is
1) Freon 2) Tetra fluoro ethane 3) tetra fluoro ethyne 4) Tetra fluoro ethene

138. Match the following
List . I List . II
1. MnO / 3000C A. Preparation of acetaldehyde from ethanoyl chloride
2. H2 / Pd . BaSO4 B. Hydration of alkynes
3. PdCl2/ CuCl2, H+ C. Catalyst used in the preparation of acetone from acetic acid
4. 1% HgSO4, H2SO4, 00C D. Hydroxylation of alkenes
E. Hydration of alkenes
The correct match is
1) 1 – C, 2 – E, 3 – A, 4 – D 2) 1 – C, 2 – A, 3 – E, 4 – B
3) 1 – A, 2 – C, 3 – B, 4 – E 4) 1 – B, 2 – E, 3 – C, 4 – A

139. The ion with highest magnetic moment is
1) V 3+ 2) Cr3 + 3) Fe 3+ 4) Co3 +

140. Assertion (A) : Standard enthalpy of compound is equal to its standard heat of formation
Reason (R) : Standard enthalpy of elements is assumed to be zero
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, R is false A
4) A is false but R is true. A

141. SO2 bleaches by
1) Reduction 2) Oxidation 3) Hydrolysis 4) Acidic nature

142. C2H5Cl + KNO2 DMF ¾¾¾® A(Major). The bond absent in ‘A’ is
1. C – N 2. C – O 3. C – H 4. C – C

143. The cell reaction of a cell is Mg(s) + Cu+2
(aq) lCu(s) +Mg+2
(aq). If the standard reduction potentials of magnesium and copper are -2.38V and +0.33V respectively, the emf of the cell is
1) + 2.03V 2) -2.03V 3) +2.71V 4) -2.71V

144. The % of ‘p’ character in hybrid orbital of the central atom of PCl5 molecule
1) 25% 2) 50% 3) 75% 4) 60%

145. Consider the statements
I) Maltose is also known as malt sugar
II) Sucrose is also known as cane sugar
III) Lactose is also known as milk sugar
IV) Starch is also known as Amylum
The correct statement is/are
1) I 2) I, II 3) I, II, III 4) I, II, III, IV

146. Which of the following has lowest thermal stability
(1) Li2CO3 (2) Na2CO3 (3) K2CO3 (4) Rb2CO3

147. Setting of plaster of paris involves
1) dehydration process 2) contraction of mass
3) hydration process 4) loss of water molecules

148. A compound formed by elements X and Y crystallizes in a cubic structure in which the X atoms are at the corners of the cube of Y atoms are at the face centres. The formula of the compounds is. X
1) X3 Y 2) XY 3) XY2 4) XY3

149. 0.16gm of an organic compound on combustion gave 0.44gm CO2 and 0.36gm H2O. The percentage weight of C and H in the compound respectively
1) 25 & 75 2) 40 & 60 3) 75 & 25 4) 60 & 40

150. Conditions for acceptable value of ‘Y ‘ (wave function) is
I) ‘Y ‘ must be continuous II) ‘Y ‘ must be infinite
III) ‘Y ‘ must be single valued
IV) The probability of finding the electron over all the space from ‘+’ infinity to ‘ – ‘ infinity must be equal to one
1) I only I 2) II only
3) I, III and IV IV 4) IV only

151. Vapour pressure of an aqueous solution is 2% less than that of the solvent. The molality of the solution is nearly.
1) 2m 2) 1.5m 3) 1.13m 4) 0.2m

152. Which of the following solutions will have the highest boiling point
1) 3 0.1M FeCl 2) 2 0.1M BaCl 3) 0.1M NaCl 4) 0.1MUrea

153. Anion exchange resin can be ‘revived’ by treating with
1) H3PO4 2) 10% HCl 3) Conc. H2SO4 4) Na2CO3.10H2O

154. 0.1M solution of the following has the highest pH.
(1) Na2CO3 (2) NaHCO3 (3) NaOH (4) CH3COOH

155. The pH of 10-8 M – HCl is.
1) 8 2) 6 3) 7 4) 6.98

156. Which of the following is most volatile.
1) HI 2) HBr 3) HCl 4) HF

157.
The incorrect statement regarding B is
1) It is more acidic than rectified spirit
2) Its boiling point is less than ether
3) It is fairly soluble in water 4) It is an aromatic compound

158. Which one of the following will influence both equilibrium state and equilibrium constant
1) Concentration of reactant 2) Presence of catalyst
3) Temperature 4) Pressure

159. SSS Bond angle, S . S bond length and no.of lone pairs present in S8 molecule are
1) 1050 ; 2.12 A0 , 8 2) 1050 , 2.12A0 , 16 3) 1050 ; 1.06A0 , 16 4) 1090.28`; 2.12A0 , 8

160. End product of HELL – VOLHARD – ZELENSKY reaction of actic acid is
1) Cl2HCCOOH 2) Cl 3CCOOH 3) 2 ClCH2COOH 4) (H3CCO)2O

1. The domain of the function is
2. If f(x) : R R _ satisfies the condition f(x + y) = f(x) + f(y) for all x, y R _ then f(x) is
3. If the sum of n terms of an A.P. is then nth term of the A.P. is____
4. If i 2j 3k,3i 2j k _ _ _ _ are sides of a parallelogram then a unit vector parallel to one of the diagonals of the parallelogram is
5. The vectors AB 3i 4k _ _ and AC 5i 2j 4k _ _ _ are the sides of a triangle ABC, then length of the median through A is
6. The length of the longer diagonal of the parallelogram constructed on 5a 2b and a 3b. _ If it is given that a 2 2 b 3 _ _ and (a, b) _ is ___
7. If a 3i 5j _ _ and b 6i 3j _ _ are two vectors and c is a vector such that c a b _ _ then a : b : c _
8. Let ai bj ck, bi c j ak _ _ _ _ _ _ _ _ and ci a j bk __ _ _ be three coplanar vectors with a b _ , and V i j k _ _ _ then V is perpendicular to
9. If the roots of the equation ax2 + ax + c = 0 are in the ratio p : q then
10. If the roots of the equation x2 – 2ax + a2 + a – 3 = 0 are real and less than 3, then
11. If , , _ _ _ are the roots of the equation x3 + 4x + 1 = 0 then =
12. If A and 3 A 125 _ , then the value of _ is
13. If A is a matrix such that trace (A) = 0 then values of x are
14. Inverse of a skew symmetric matrix of odd order is
15. If the system of equations x+2y+3z= x _ , 3x+y+2z= y _ , 2x+3y+z= z _ has non trivial solution then _=
16. The rank of is
17. A polygon has 44 diagonals, the number of its sides are
18. How many different nine digit numbers can be formed from the number 223355888 by rearranging its digits so that the odd digits occupy even positions
19. The number of rational terms in the expansion of _ _ is
20. The coefficient of x6 in is
24. If A is a square matrix such that A(adj A) = 4(I3). Then adj(adj A) = ____
25. If _ , then (J~ò#) 2 n1 cos cos 2 .cos 2 ……..cos 2 _ _ _ _ _ =
26. If , , , _ _ _ _ are solutions of the equation tan 3tan 3 _ , no two of which have equal tangents then the value of tan tan tan tan _ _ _ _ _ _ _ = tan 3tan 3
27. The most general value of _ satisfying 3 tan tan 2 4 is
28. In a ABC _ if A = tan–12, B = tan–13 then C =
29. If x is an acute angle and x y log tan then cosx.coshy =
30. A tree is broken by wind, its upper part touches the ground at a point 10 meters from the foot of the tree and makes an angle 450 with the ground the entire length of the tree is
31. If then triangle ABC is
32. If in ABC _ , the altitudes are in A.P then sides are in
33. If x2 + x + 1 = 0 then the value of
34. If _ and _ are roots of x2 – 2x + 4 = 0 then n n _ _ _ =
35. If 5 3 3 5 sin 6 a cos sin b cos sin c cos sin _ _ _ _ _ _ _ _ _ _ then a + b + c =
36. If the axes are shifted to the point (1, –2) with out rotation then transformed form of y2–4x+4y+8=0 is
37. The equation to the base of an equilateral triangle is 3x – 4y + 15 = 0 and one vertex is (1, 2) then the length of the side is
38. The vertices of a triangle are (0, 0), _ _ _ _ 3,3 , 3,3 _ then the incentre is
39. If (– 4, 5) is one vertex and 7x – y + 8 = 0 is one diagonal of a square then equation of the second diagonal is
40. The distance of the point (2, 3) from the line 2x – 3y + 9 = 0 measured along a line x – y + 1 = 0
41. The distance from a point _ _ , _ _ to a pair of lines passing through the origin is d then equation to the pair of lines is
42. The circum radius of the triangle ABC with vertices A(2, –1, 1), B(1, –3, –5), C(3, –4,–4) is
43. If the line joining the points (2, 3, 4), (0, 1, 2) is perpendicular to the line joining the points (x, 0, 4), (7, –4, 3) then x =
44. The equation of the perpendicular bisecting plane of the line segment joining (–3, 1, 2), (7, 5, 4) is
45. If the lengths of the tangents from two points A, B to a circle are 6,7 respectively. If A, B are conjugate points then AB =
46. If the circle x2 + y2 + 4x + 22y + c = 0 bisects the circumference of the circle x2 + y2 – 2x + 8y–d= 0 then c + d =
47. If (1, 2), (4, 3) are the limiting points of a coaxal system then the equation of the circle in its conjugate system having minimum area is
48. If (2, 3, 5) is the one end of a diameter of a sphere x2 + y2 + z2 – 6x – 12y – 2z + 20 = 0 then the other end of diameter is
49. If PSP| is a focal chord of a parabola y2 = 4ax and SL is its semi latusrectum then SP, SL, SP| are in
50. The condition that the line y = mx + C be the tangent to the parabola y2 = 4a(x + a) is
51. If the latus rectum LL| subtends a right angle at the centre of the ellipse then e =
52. Product of the perpendiculars from any point on hyperbola _ _ to its asymptotes is
53. The equation represents an ellipse if
54. The angle between the circles r a cos( ), f bsin( ) _ R _B _ R _B is
55. The quadratic equation whose roots are ,m _ where 3sin 4sin Lt and 2 tan m Lt 1 tan R is
56. The points of discontinuity of f(x) = log x are
57. I : If f(x) = _ , then (J~ò#) f | (a) = 0.
II : If f(x) = x – x2 + x3 – x4 + ……. _, x 1 _ , then (J~ò#) f | (x) = _ _2
58. If y = sin x sin x sin x ….. _ _ _ __ then (J~ò#)
59. The function f(x) 1 sin x _ is
60. If u sin x y then (J~ò#) xux + yuy =
61. The radius of a circular plate is increasing at the rate of 0.01 cm/sec when radius is 12 cm, then the rate of increase in its area is
sq. cm/sec
62. If there is an error of 0.05 cm while measuring the side of an equilateral triangle as ‘a’ cm. Then the percentage error in area is
63. The sub tangent, ordinate and sub normal to the parabola y2 = 4ax at a point different from origin are in
64. The perimeter of a sector is given the area is maximum when the angle of sector is
65. If y = xn–1 logx then (J~ò#) yn =
70. If _ _ then (J~ò#) _ _
71. The area enclosed between the curves y2 = x and y = x is
72. Solution of differential equation _ _ _ _ 2 2 2 2 y xy 2x y dx x xy x y dy 0 _ _ _ _ is
73. The solution of given y = 0, x = 1 is
74. A fair die is rolled, the probability that the 1st time 1 occurs at even throws is
75. A bag contains 4 balls, two balls are drawn and found to be white, the probability that all the balls are white is
76. If the range of the random variable X is {0, 1, 2, 3 ……..} with P(X = K) = , for K 0 _ then a =
77. Out of 10,000 families with 4 children each the probable number of families all of whose children are daughters is
78. _ for 0 x 1 _ _ and the interval (0, 1) is divided into 2 equal subintervals using trapezoidal rule, the value of _ _ is
80. Assertion (A) : The unknown coefficient of the equation x2 + bx + 3 = 0 is determined by throwing an ordinary six faced die, then the probability that the equation has real root is 1/2.
Reason (R) : For the quadratic equation ax2 + bx + c = 0 condition for real roots is b2 – 4ac _0.
The the correct answer is
Ans: A and R are true and R is the correct explanation of A.

Answers:

1) 4 2) 3 3) 2 4) 1 5) 3 6) 3 7) 2 8) 4 9) 1 10) 1
11) 3 12) 3 13) 1 14) 4 15) 1 16) 4 17) 3 18) 3 19) 3 20) 1
21) 2 22) 3 23) 3 24) 1 25) 1 26) 4 27) 1 28) 2 29) 3 30) 3
31) 1 32) 3 33) 4 34) 2 35) 4 36) 3 37) 1 38) 1 39) 1 40) 4
41) 3 42) 3 43) 2 44) 1 45) 2 46) 2 47) 3 48) 2 49) 3 50) 1
51) 4 52) 1 53) 3 54) 3 55) 2 56) 3 57) 3 58) 2 59) 3 60) 2
61) 1 62) 3 63) 2 64) 2 65) 3 66) 2 67) 1 68) 1 69) 4 70) 1
71) 3 72) 1 73) 1 74) 2 75) 2 76) 2 77) 1 78) 3 79) 2 80) 1