If 0.75 mole of cyclopropane and 0.66 mole of oxygen are mixed in vessel with a total pressure of 0.7 atmosphere, what is the partial pressure of oxygen in the mixture
- A. 0.44 atmosphere
- B. 0.22 atmosphere
- C. 0.55 atmosphere
- D. 0.33 atmosphere
\(^{14}\) \(_6\)C β X + Ξ²
X in the equation above represents
- A. 126C
- B. 125B
- C. 147N
- D. 136C
The postulate of Dalton’s atomic theory which still holds is that
- A. atoms can neither be created nor destroyed
- B. the particles of the same element are exactly alike
- C. particles of different elements combine in simple whole number ratio
- D. all elemets are made of small indivisible particles
The processes which return carbon (IV) oxide to the atmosphere include
- A. respiration, decay and combustion
- B. photosynthesis, respiration and transpiration
- C. ozone depletion, combustion and decay
- D. photosynthesis, decay and respiration
A fixed mass of gas has a volume of 92\(cm^3\) at 3ΒΊC. What will be its volume at 18ΒΊC if the pressure remains constant?
- A. 15.3cm3
- B. 87.3cm3
- C. 552.0cm3
- D. 97.0cm3
Which of the following chloride would exhibit the least ionic character?
- A. MgCl2
- B. CaCl2
- C. LiCl
- D. AlCl3
Which of the following statement is true of a proton?
- A. The mass of a proton is 1840 times the mass of electron
- B. the total mass of the protons in a particular nucleus is always half the nuclear size
- C. The mass of a proton is one - twelfth the molar mass of carbon
- D. The mass of a proton is 1.0008g
A rock sample was added to cold dilute HNO3. The gas evolved was passed into a solution of acidified K2Cr2O7 and the solution turned green. The sample contains
- A. Cl-
- B. NO3-
- C. SO32-
- D. SO42-
The intermediate product formed when ethanol is progressively oxidized to ethanoic acid with potassium heptaoxodichromate (IV) is
- A. butanal
- B. ethanal
- C. methanal
- D. propanal
Hydrogen is readily released when dilute hydrochloric acid reacts with
- A. Cu
- B. Na
- C. Au
- D. Ag
which of the following polymers is suitable for packaging and electrical insulation?
- A. polyamide
- B. polyethene
- C. polycarbonate
- D. polystyrene
The most important use of hydrogen is in the
- A. manufacture of ammonia
- B. manufacture of methyl alcohol
- C. manufacture of ethyl alcohol
- D. hydrogenation of oils
The boiling of fat and aqueous caustic soda is referred to as
- A. hydrolysis
- B. esterification
- C. acidification
- D. saponification
A red precipitate of copper (I) carbide is formed when ammonium solution of copper (I) chloride is introduced into
- A. CH3CH2CH2CH3
- B. CH2 = CH - CH2CH3
- C. HCβ‘CH
- D. CH3 - C = C - CH3
Ordinary glass is manufactured from silica, CaCO3 and
- A. Na2CO3
- B. K2CO3
- C. K2SO4
- D. NaHCO3
Which of these pairs are synthetic and natural macromolecules respectively?
- A. Haemoglobin and nylon, creatine and polyethylene
- B. Nylon and polyethlene, creatine and Haemoglobin
- C. Nylon and creatine, polyethylene and haemoglobin
- D. Creatine and Polyethylene, nylon and haemoglobin
The number of isomers formed by C\(_6\)H\(_{14}\) is
- A. 4
- B. 5
- C. 2
- D. 3
The reaction of an alkene with hydrogen in the presence of catalyst is
- A. a substitution reaction
- B. an oxidation reaction
- C. a nucleophilic reaction
- D. an addition reaction
An example of element that can catenate is
- A. bromine
- B. nitrogen
- C. chlorine
- D. carbon
Which of the following gives a precipitate when treated with NaOH solution?
- A. AlCl3
- B. NH4CL
- C. CH3COONa
- D. Na2CO3
Ethanol can easily be produced by
- A. fermentation of starch
- B. distillation of starch solution
- C. catalytic oxidation of methane
- D. destructive distillation of wood