Chemistry is the rank deciding factor in EAMCET Engineering and Medical streams. Here are model / practice questions useful for EAMCET candidates in Andhra Pradesh. Answers are also given at the end of the questions.
121. Which of the following is false
1) acetaldehyde is commercially prepared by one step oxidation of acetylene
2) pH value of acid rains will be less than 6
3) CO2, SO2 and NO2 are global warming gases
4) London smog has reducing character, due to the presence of carbon and sulphur dioxide
122. I) Both ethylene and acetylene decolourise Baeyer’s reagent.
II) Both ethylene and acetylene give same product on ozonolysis reaction
III) Both ethane and acetylene have acidic hydrogens
IV) Both ethylene and acetylene can be prepared from 1,2-Dibromoethane
Correct statements are
1) I and II 2)I and IV 3)II and III 4)III and IV
123. Which of the following is more reactive twowards SN1 reaction ?
1) CH2 = CHCl 2) CH3Cl 3)(CH3)2 CHCl 4)C6H5CH2Cl
124. The organic compound “Y” is also obtained in the following reaction
125. Correct order of strength of basic nature is
1) ClO-4 > CH- 3 > CH 3COO- > OH-
2) OH – > ClO4 > CH 3 COO – > CH 3-
3) CH 3COO – > CH 3 > OH – > ClO4 –
4) CH 3- > OH – > CH 3COO – > ClO4-
126. Among the following the paramagnetic compound is
1) Na2O2
2) O3
3) N2O
4) KO2
127. Maximum number of electrons with s = +1/2 in Cr+ ion in the ultimate shell are
1) 12 2) 7 3) 11 4) 9
128. When moist chlorine is made to react with hypo, the products formed are
1) Na2SO3 + S + HCl 2) Na2SO4 + S + HCl 3) Na2S + S + HCl 4) Na2SO4 + HCl
129. Match the following :
List – I List – II
A) Molecular crystal I) CsCl
B) Ionic crystal II) SiO 2
C) Covalent crystal III) Si
D) Metallic crystal IV) I 2
V) Sn
130. Which of the following reaction can be reversible
1) NaOH + CH 3COOH ? CH 3COONa + H 2O
2) NaOH + HCl ? NaCl + H 2O
3) 2 KClO3 ? 2 KCl + 3O2
4) NH 4 NO2 ? N 2 + 2 H 2O
131. In the sequence of reactions
If ‘A’ is formaldehyde, then ‘E’ is
1) CH3CH2OH 2) CH3CHO 3) CH3COCH3 4) CH3COOH
132. Which of the following is acidic in nature
1) B(OH)3 2) Be(OH)2 3) Mg(OH)2 4) Al(OH)3
133. S(s ) + O2( g ) ? SO3( g ) + 2 X K .Cal
2
1
SO ( g ) + O2( g ) ? SO3( g ) + Y K .Cal
2
2
Based on the above reactions heat of formation of SO2 is
1) Y – 2X
2) Y + 2X
3) 2X – Y
4) X – Y
134. One mole of an octahydral complex [Co ( NH 3 )x (Cl )y] Clz with excess silver nitrate solution gives two moles of silver chloride precipitate. Then the values of x, y, z are respectively.
1) 4, 2, 1 2) 5, 1, 2 3) 6, 0, 3 4) 5, 1, 3
135. Match the following
List – I List – II
DH DS Nature of reaction
– + a) Non spontaneous at high temperature
+ + b) Spontaneous at all temperatures
– – c) Sponteneous at high temperatures
+ – d) Non sponteneous at all temperatures
The correct answer is
A B C D A B C D A B C D A B C D
1) a b c d 2) c b a d 3) b c a d 4) a d c b
136. The number of P – O – P bridges in the structure of phosphorus trioxide and phosphorous pentoxide are respectively.
1) 5 , 5
2) 5 , 6
3) 6 , 5
4) 6 , 6
137. Wrong statement of the following :
1) Xe is sp3d hybridised in XeF2
2) Shape of XeO3 is planar trigonal
3) XeF6 is formed in third excited state of Xe
4) Central atom of XeO4 has no lone pairs
138. C2 H 4 ????? X ???? A ??????? B ????? C ?? D
In the above sequence of reactions which compounds can give haloform test
1) A, B, C 2) A, D, X 3) A, C, D 4) X, A, C
139. a P4 + b H2O + c OH – ? PH3 + H2P O-2
In the reaction the coefficients a, b and c are
1) 1, 3, 3 2) 4, 12, 4 3) 1, 12, 12 4) 4, 6, 6
140. Four C – H bonds of CH4 molecule according to valence bond theory are
1) Four different types
2) Three are one type and the remaining is different
3) Two are one type and the other two are different
4) All four same type
141. Assertin (A) : 2-methyl-1, 3-butadiene is the monomer for natural rubber.
Reason (R) : Natural rubber is formed through addition polymerisation.
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 and R is false A
4) A is false and R is true A
142. Assertion (A) : Chlorobenzene is less reactive than benzene towards electrophilic substitution reactions.
Reason (R) : Chlorine atom in chlorobenzene, deactivates the ring by negative inductive effect.
1) A and R are true and R is the correct explanation of A.
2) A and R are true and R is not the correct explanation of A.
3) A is true, R is false.
4) A is false, R is true.
143. Some Statements about carbohydrates are given below
(A) Glucose does not react with sodium bisulphite
(B) Invert sugar is an equimolar mixture of glucose and fructose
(C) Sucrose is a reducing sugar
(D) Cellulose contains D glucose units joined by a glycosidic linkages at 1, 4 positions
The correct statements are
1) A, B and C
2) B, C and D
3) A, C and D
4) A and B
144. The atomic weights of nitrogen, oxygen, fluorine and neon are 14, 16, 19 and 20 respectively.
The gas with the highest rate of diffusion is
1) Nitrogen
2) Oxygen
3) Fluorine
4) Neon
145. The dipolemoment of a compound ‘MCl3’ is zero. The group of the element ‘M’ in periodic table would be
1) VA
2) IVA
3) IIIA
4) VIIA
146. The volume of CO2 liberated at S.T.P by heating 60 gm of 70% pure magnesite is
1) 5.6 lit
2) 11.2 lit
3) 22.4 lit
4) 44.8 lit
147. A catalyst cannot alter
1) rate of a chemical reaction
2) rate constant of a chemical reaction
3) heat of reaction
4) activation energy of a chemical reaction
148. The basic nature of aliphatic amines is influenced by
A. Hydrogen bonding with the solvent molecules.
B. Inductive effect of alkyl group
C. Steric factors
Among them
1) A opposes B and C
2) B opposes C and A
3) C opposes A and B
4) One opposes another
149. Which of the following represents the correct graph for physical adsorption at constant pressure.
150. The IIA group carbonate which decomposes at 250C is
1) BaCO3
2) MgCO3
3) BeCO3
4) CaCO3
151. In the radial probability curve of 2s orbital, two peaks are present. The radial distance between them is
1) 53nm
2) 110nm
3) 210nm
4) 260nm
152. A galvanic cell is composed of two hydrogen electrodes, one of which is standard one. In which of the following solutions should be other electrode be immersed to get maximum emf
1) 0.1M HCl
2) 0.1M CH3COOH
3) 0.1M H3PO4
4) 0.1M H2SO4
153. Which of the following species has the highest ionisation potential ?
1) He
2) Li+
3) Al+
4) Ne
154. The IUPAC name of an isomer of C4H10O which exhibits optical isomerism is
1) 2-methyl-2-propanol
2) 2 – methyl – 1 – propanol
3) 2 – butanol
4) 1 – butanol
155. 1 kg of water containing the following mass of MgCl2 has the hardness of 1000 ppm
1) 9.5 g
2) 0.95 g
3) 95 g
4) 950 g
156. Among the following the colligative property is
1) Boiling point
2) Freezing point
3) Osmotic pressure
4) Density
157. Antiblood clotting drug which prevents heart attack is
1) Acetyl salicylic acid
2) 4 hydroxy acetanilide
3) p-nitrophenol
4) N-(4 ethyoxy phenyl) acetamide
158. SiO2 does not react with
1) CaCO3 at high temperature
2) Hot NaOH solution
3) Hydrofluoric acid
4) Hydrochloric acid
159. The mineral ‘Calamine’ is chemically
1) calcium carbonate
2) zinc carbonate
3) calcium sulphate
4) zinc sulphide
160. The reagent ‘Z’ in the above sequence is
1) H + , K 2 Cr2 O7
2) H 3 PO 2
3) OH ? , KMnO 4
4) LiAlH4
Answers: 120) 1 122) 2 123) 4 124) 125) 2 126) 4 127) 4 129) 2 130) 1 132) 1 133) 1 134) 2 142) 1 143) 4 152) 2 153) 2 2 144) 4 154) 3 135) 3 136) 4 145) 3 146) 2 155) 2 156) 3 137) 2 147) 3 157) 1 128) 2 138) 2 148) 4 158) 4 139) 1 149) 1 159) 2 140) 2 150) 3 160) 2