Incomplete oxidation of ethanol yields
- A. CH3COOH
- B. CH3COCH3
- C. CH3CH2OCH2CH3
- D. CH3CHO
A sample of orange juice is found to have a PH of 3.80. What is the concentration of the hydroxide ion in the juice?
- A. 1.6 \(\times\) 10-4
- B. 6.3 \(\times\) 10-11
- C. 6.3 \(\times\) 10-4
- D. 1.6 \(\times\) 10-11
When few drops of concentrated trioxonitrate(V) acid is added to an unknown sample and wanned an intense yellow colouration is observed. The likely functional group present in the sample is
- A. NH2RCHCOOH
- B. CHO
- C. CO
- D. CNH2
An isomer of C5H12 is
- A. 2–ethyl butane
- B. butane
- C. 2–methyl butane
- D. 2–methyl propane
A given mass of gas occupies 2dm3 at 300k. At what temperature will its volume be doubled, keeping the pressure constant?
- A. 400k
- B. 480k
- C. 550k
- D. 600k
For a general equation of the nature xP + yQ → mR + nS, the expression for the equilibrium constant is
- A. k [P]x [Q]y
- B. \(\frac{[P]^x [Q]^y}{[R]^m [S]^n}\)
- C. \(\frac{[R]^m [S]^n}{[P]^x [Q]^y}\)
- D. \(\frac{m[R] n[S]}{x[P] y[Q] }\)
The constituent of air necessary in the rusting process are
- A. O2 and H2O
- B. Ar and CO2
- C. CO2 and H2O
- D. O2 and CO2
In the laboratory preparation of ethyl ethanoate, the water present in the mixture is removed using ?
- A. Anhydrous CaCl2
- B. concentrated NaCO4
- C. dilute NaOH
- D. concentrated H2SO4
The process that occurs when two equivalent forms of a compound are in equilibrium is
- A. Isotopy
- B. Resonance
- C. Isomerism
- D. Reforming
The acid anhydride that will produce weak acid in water is
- A. SO3
- B. NO2
- C. SO2
- D. CO2
Temporary hard water is formed when rain water containing dissolved carbon(IV) oxide flows over deposits of
- A. CaCO3
- B. Na2CO3
- C. Na2SO4
- D. CaSO4
The tincture of iodine means iodine dissolved in
- A. ethanol
- B. bromine chloride
- C. chlorine water
- D. water
Aluminium hydroxide is used in the dyeing industry as a
- A. dye
- B. dispersant
- C. salt
- D. mordant
The shape of the S-orbital is
- A. elliptical
- B. spiral
- C. circular
- D. spherical
The constituent common to duralumin and alnico is
- A. Co
- B. Mn
- C. Al
- D. Mg
The general formula of alkanones is
- A. RCHO
- B. RCOR'
- C. RCOOH
- D. RCOOR
Consider the following equilibrium system:
2SO2(g) + O2(g) \(\rightleftharpoons\) 2SO3(g)
The addition of more O2(g) to the system will shift the equilibrium position to the
- A. Right leading to the production of more SO3(g)
- B. Right leading to the production of more SO2(g)
- C. Left leading to the production of more SO2(g)
- D. Left leading to the production of more SO3(g)
The correct balanced equation for the reaction between aluminium metal and hot concentrated tetraoxosulphate(VI)acid is ?
- A. 2AI(s) + 6H2SO4(1) \(\to\) AI2(SO4)3(aq) + 6H2O(1) + 3SO2(g)
- B. 2AI(s) + 3H2SO4(1) \(\to\) AI2(SO4)3(aq) + 6H2O(1) + 3SO2(g)
- C. 2AI(s) + 4H2SO4(1) \(\to\) AI2(SO4)3(aq) + 8H2O(1) + 3SO2(g)
- D. 2AI(s) + 5H2SO4(1) \(\to\) AI2(SO4)3(aq) + 8H2O(1) + 3SO2(g)
Which of the following gases is monoatomic?
- A. Argon
- B. Chlorine
- C. Nitrogen
- D. Oxygen
Which of the following polymers in thermosetting?
- A. Bakelite
- B. Nylon
- C. Polypropene
- D. Polystyrene