|
1) The PH of the 1.3 × 10-4 NH4Cl is__________? a. 1.3 b. 4.0 c. 2.886 d. 3.886
|
||||
|
2) The PH of milk is __________? a. 6.0 b. 6.5 c. 7.0 d. 7.5
|
||||
|
3) The PH of Tears is __________? a. 7.0 b. 7.4 c. 7.8 d. 8.2
|
||||
|
4) The PH of pure water at 25°C, kw=1×10-4____________? a. 0 b. 7 c. 14 d. None of above
|
||||
|
5) When 0.01 moles of NaOH are added to a buffer solution, its PH changes from 4.745 to 4.832. What is its? a. 0.115 b. 0.900 c. 0.015 d. 0.215
|
||||
|
6) Alpha particles can be detected by using___________? a. Gold foils b. Barium sulphate c. Zinc sulphide screen d. Thin Aluminium sheet
|
||||
|
7) Which one of the following is the correct sequence according to atomic weights? a. Fe>Co> Ni b. Co > Ni > Fe c. Ni> Co> Fe d. Co >Fe>Ni
|
||||
|
8) Generally the limit of visible spectrum is__________? a. 1000 to 300 A° b. 3800 to 7600 A° c. 8000 to 10,000 A° d. 12,000 to 15,000 A°
|
||||
|
9) If R is the Rydberg constant for hydrogen, then wave-number of the second line in the Lyman series is _________? a. 2 R b. R/2 c. 3R/4 d. R/4
|
||||
|
10) Magnetic quantum number specifies___________? a. Size of orbitals b. Shape of orbitals c. Orientation of orbitals d. All of the above
|
||||
|
11) Azimuthal quantum number defines___________? a. e/m ratio of an electron b. Spin of an electron c. Angular momentum of an electron d. Magnetic momentum of an electron
|
||||
|
12) The energy of one mole of photons of radiation, whose frequency is 4×10 14 Hz, is ___________? a. 159.6kJ b. 135.5 KJ c. 110.5 KJ d. 80.4 KJ
|
||||
|
13) Which of the following gases shows more ideal behaviour at 0°C___________? a. H2 b. CH4 c. He d. NH3
|
||||
|
14) In a closed vessel, a gas is heated from 300K to 600 K. The kinetic energy becomes__________? a. Double b. Same c. Half d. Four times
|
||||
|
15) Pressure remain constant, at which temperature the volume of gas becomes twice of what it is at 0°C? a. 546 °C b. 546 K c. 200°C d. 273 K
|
||||
|
16) The density of a gas is 1.964 g dm-3 at 273 K and 76 cm Hg. The gas is _________? a. CH4 b. CO2 c. C2H4 d. Xe
|
||||
|
17) Which of the following haloalkane is hydrolysed by SN1 mechanism? a. CH3Br b. CH3CH2Br c. CH3CH2CH2Br d. (CH3)3CBr
|
||||
|
18) Hydrocarbon is formed when Grignard reagent is treated with___________? a. H2O b. CH3OH c. Both a and b d. None of the above
|
||||
|
19) Grignard reagent gives carboxylic acid with____________? a. CO2 b. CH3CHO c. COC2 d. HCN
|
||||
|
20) The law of traids is applicable to__________? a. Li, Be, B b. F, Cl, Br c. Cl, Br, I d. Na, K, Rb
|
||||
|
21) The concept of telluric helix was developed by___________? a. Lother Meyer b. A.E de Chancourtois c. Newland d. Dobereiner
|
||||
|
22) Which group contains elements that exist as monoatomic molecule? a. 1 b. 2 c. 14 d. 18
|
||||
|
23) The element having electronic configuration [kr] 4d10, 4f14,5s2,5p6,5d1,6s2 belongs to __________? a. S-Block b. P-Block c. d-Block d. f-Block
|
||||
|
24) Which one of the following is a bridge element? a. Be b. Cl c. K d. P
|
||||
|
25) The common oxidation state of lanthanides is_________? a. +3 b. +2 c. +1 d. +4
|
||||
|
26) Which of the following is most soluble on water? a. BaSO4 b. SrSO4 c. CaSO4 d. MgSO4
|
||||
|
27) Which of the following orbitals has maximum penetration effect? a. S b. P c. d d. f
|
||||
|
28) Which of the following phenomenon is considered responsible for Global Warming? a. Greenhouse effect b. Fire in coal mines c. Dry farming d. Monsoon
|
||||
|
29) The number of d-electrons in Fe2+ (Z = 26) is not equal to that of____________? a. p-electrons in Ne(Z = 10) b. s-electrons in Mg(Z = 12) c. d-electrons in Fe(Z = 26) d. p-electrons in CI(Z = 17)
|
||||
|
30) The metallurgical process in which a metal is obtained in a fused state is called__________? a. smelting b. roasting c. calcinations d. froth floatation
|
||||
|
31) The molecules of which gas have highest speed? a. H₂ at -73°C b. CH₄ at 300K c. N₂ at 1,027°C d. O₂ at 0°C
|
||||
|
32) The law which states that the amount of gas dissolved in a liquid is proportional to its partial pressure is___________? a. Dalton’s law b. Gay Lussac’s law c. Henry’s law d. Raoult’s law
|
||||
|
33) The main buffer system of the human blood is____________? a. H₂CO₃ – HCO₃ b. H₂CO₃ – CO₃²⁻ c. CH₃COOH – CH₃COO⁻ d. NH₂CONH₂ – NH₂CONH⁺
|
||||
|
34) The most commonly used bleaching agent is_________? a. alcohol b. carbon dioxide c. chlorine d. sodium chlorine
|
||||
|
35) The heat required to raise the temperature of body by 1 K is called___________? a. specific heat b. thermal capacity c. water equivalent d. None of the above
|
||||
|
36) The mass of P4O10 that will be obtained from the reaction of 1.33 gram of P4 and 5.07 of oxygen is___________? a. 2.05 gram b. 3.05 gram c. 4.05 gram d. 5.05 gram
|
||||
|
37) The octane number of zero is assigned to____________? a. 2-methyl octane b. n-heptane c. iso-octane d. 3-methyl octane
|
||||
|
38) The Latin word formica means ant. The name formic acid is derived from this Latin word because__________? a. this acid, in ancient times, was used to eliminate ant-hills b. this corrosive acid is secreted by ants to drive away their enemies c. this acid was first obtained by the distillation of ants d. ants are attracted by the odour of this acid
|
||||
|
39) The heat energy produced when the human body metabolises 1 gram of fat is__________? a. 30 KJ b. 1 KJ c. 39 KJ d. 29 KJ
|
||||
|
40) A compound is determined to have an emperical formula of C2H6O and a molar mass of 138 g/mole. What is the molecular formula? a. C2H6O b. C6H18O3 c. C6H12O6 d. C2H5O
|
||||
|
41) A substance is analyzed and found to have an emperical formula of CH2 and a molar mass of 56g/mole. What is the molecular formula of the compound? a. C2H4 b. C3H6 c. C4H8 d. C5H10
|
||||
|
42) The number of atoms present in 21.6 gram of silver (atomic weight = 108) are same as the molecules in__________? a. 1.8 gram of H₂O b. 12 moles of KMnO₄ c. 0.6N H₂SO₄ d. 4.6 gram of C₂H₅OH
|
||||
|
43) The molecular formula for cholesterol is C27 H46 O. What are the degrees of unsaturation for this compound? a. 5 b. 6 c. 7 d. 8
|
||||
|
44) The most appropriate method for separating a large quantity of a mixture of nonvolatile, nonpolar organic compounds would be__________? a. Distillation b. Extraction c. Gas chromatography d. Column chromatography
|
||||
|
45) The relatively high energy of the gauche conformation of butane is primarily associated with_________? a. Angle strain b. Torsional strain c. Steric strain d. Orbital strain
|
||||
|
46) When an aldehyde is reacted with hydrogen cyanide a ” Cyanihydrin” is formed. This process is best termed as __________? a. Electrophilic addition b. Electrophilic substitution c. Nucleophilic addition d. Necleophilic substitution
|
||||
|
47) Which of the following solvents would best facilitate an SN2 substitution reaction? a. Water b. Hexane c. Dimethylflormamide d. Ethanol
|
||||
|
48) In a molecule of carbon monoxide, what are the formal charges on the two atoms? a. Carbon=0, Oxygen=0 b. Carbon= +1, Oxygen= -1 c. Carbon= -1, Oxygen= +1 d. Carbon=0, Oxygen= -1
|
||||
|
49) Which of the following aqueous solutions would have the highest boiling point? a. 0.20 m glucose b. 0.20 m NaCl c. 0.15 m CaCl2 d. 0.25 m sucrose
|
||||
|
50) The mass of 3.2 moles of ammonia (NH3) gas? a. 53.4 grams b. 54.4 grams c. 55.4 grams d. 56.4 grams
|
||||
