What is the partial pressure of oxygen at s.t.p. in a gaseous mixture containing 100 cm3 of oxygen and 900 cm3 of nitrogen gas?
- A. 1.0 atm
- B. 0.1 atm
- C. 9.0 atm
- D. 0.9 atm
Which of the following acids would form normal salt only?
- A. Tetraoxosulphate(VI) acid
- B. Trioxonitrate(V) acid
- C. Tetraoxophosphate(V) acid
- D. Trioxosulphate(IV) acid
Consider the following reaction equation:
CaO + SiO\(_{2}\) ——> CaSiO\(_{3}\)
Silicon(IV) oxide is acting as
- A. a basic oxide
- B. a reducing agent
- C. an acidic oxide
- D. an oxidizing agent
Before a reaction could take place, there should be
- A. ionization of reactant particles
- B. breakage of bonds of products
- C. breakage of bonds of reactants
- D. ionization of product particles
A white precipitate was formed when BaCl\(_{2(aq)}\) was added to an aqueous solution
of a salt X. The precipitate dissolved in dilute HCl with rapid effervescence. Salt X is likely to contain
- A. SO\(_{4}\) \(^{2-}\) ions
- B. SO\(_{3}\) \(^{2-}\) ions
- C. NO\(_{3}\)- ions
- D. SO\(_{3}\) \(^{2-}\)- ions
Increasing the temperature generally
- A. decreases the solubility of a solid in a liquid but increases the solubility of a gas in a liquid.
- B. increases the solubility of a solid in a liquid but decreases the solubility of a gas in a liquid.
- C. increases the solubility of both a solid and a gas in a liquid
- D. decreases the solubility of both a solid and a gas in a liquid
If 5.0 g of marble reacts with 25.0 cm3 hydrochloric acid, which of the following combinations has the fastest reaction rate?
- A. Marble chips and 2.0 mol dm\(^{-3}\) HCl\(_{(aq)}\)
- B. Marble chips and 2.5 mol dm\(^{-3}\) HCl\(_{(aq)}\)
- C. Powdered marble and 2.5 mol dm\(^{-3}\) HCl\(_{(aq)}\)
- D. Powdered marble and 2.0 mol dm\(^{-3}\) HCl\(_{(aq)}\)
A colourless gas with a pungent smell is evolved when dilute hydrochloric acid is added to a sample of a salt. The gas evolved could turn
- A. acidified K\(_{2}\)Cr\(_{2}\)O\(_{7}\) solution colourless
- B. acidified KMnO\(_{4}\) solution colourless
- C. Fe(NO\(_{3}\))\(_{2}\) solution green
- D. Pb(NO\(_{3}\))\(_{2}\) paper black
The IUPAC name for CH\(_{3}\)CHCH\(_{3}\)CHCLCHCH\(_{3}\)CH\(_{2}\)CH\(_{3}\) is
- A. 2, 4 - dimethyl - 3 - chlorohexane
- B. 3, 5 - dimethyl - 4 - chlorohexane
- C. 4 - chloro - 3, 5 - dirnethylhexane
- D. 3 - chloro - 2, 4 - dimethylhexane
Oxochlorate(I) acid is used as a bleaching agent because it is
- A. a weak acid
- B. a reducing agent.
- C. an oxidizing agent
- D. a strong acid.
Determine the quantity of electricity used when a current of 0.20 amperes is passed through an electrolytic cell for 60 minutes.
- A. 12C
- B. 120C
- C. 360C
- D. 720C
The products of the electrolysis of dilute sodium chloride using carbon electrodes are
Anode Cathode
- A. chlorine and sodium.
- B. oxygen and hydrogen.
- C. chlorine and hydrogen.
- D. hydrogen and oxygen.
If 60 g of M combines with 24 g of oxygen, what would the empirical formula of the oxide be?
( molar mass of M = 120, O = 16)
- A. MO
- B. MO\(_{2}\)
- C. MO\(_{3}\)
- D. MO\(_{4}\)
Which of the following statements about the standard hydrogen electrode is not correct?
- A. The hydrogen gas is at a pressure of 1 atmosphere
- B. A solution containing 1 mol dm-3 of H+ (aq) ions is used
- C. A platinum electrode is used
- D. The temperature is kept at 20 °C
Alkanols can be manufactured from alkenes by the initial reaction of alkenes with
- A. bromine in tetrachloromethane
- B. concentrated tetraoxosulphate(VI) acid
- C. aqueous potassium tetraoxomanganate(VII).
- D. sodium hydroxide solution.
Which of the following compounds would react rapidly with bromine?
- A. Benzene
- B. Hexane
- C. Hexene
- D. Hexanol
What amount of electricity is required to deposit one mole of aluminium from a solution of AlCl3?
- A. One Faraday
- B. One ampere
- C. Three Faradays
- D. Three amperes
The following compounds are condensation polymers except
- A. nylon
- B. protein
- C. starch
- D. polyethene
The cleansing effect of soap is low in acidic water because of
- A. the formation of unionized fatty acid.
- B. increase in the pH of the soap molecules.
- C. anti-biodegradable effect of hydrogen ions
- D. the hardness of the acidic water.
Which of the following sugars is a product of the condensation of monosaccharides?
- A. galactose
- B. maltose
- C. glucose
- D. fructose
The by-product of fermentation of sugar is
- A. carbon(IV) oxide.
- B. ethanoic acid.
- C. propanol
- D. propan-1, 2, 3- triol.