Chemistry Past Questions And Answers
Which of the following is required in an experiment to determine the enthalpy of solution of anhydrous CuSO? l. Mass of the anhydrous CuSO 4 II. Volume of water in which the CuSO4 is dissolved lll. lnitial temperature of water lV. Final temperature of the solution
- A. l and ll only
- B. lll and IV only
- C. ll, lll, and IV only
- D. l, ll, lll, and IV only
Which of the following arrangements is in order of increasing metallic property?
- A. Li< Na< k
- B. Na< Li< K
- C. K
- D. K< Li< Na
In the chemical reaction of A + B = C + D, more of D is formed
- A) if the concentration of A is reduced
- B) if the concentration of B is reduced
- C) if the concentration of C is reduced
- D) if it is continuously removed from the reaction mixture
For a reaction in equilibrium, the species involved in the equilibrium constant expression are
- A. gaseous and solid species
- B. liquid and solid species
- C. solid and dissolved species
- D. gaseous and dissolved species
Which of the following ions is a pollutant in drinking water even in trace amount?
- A) Ca2+
- B) Hg2+
- C) Mg2+
- D) Fe2+
What is the amount (in mole) of sodium trioxocarbonate (IV) in 5.3 g of the compound? (Na2CO3 = 106)
- A. 0.05
- B. 0.10
- C. 0.20
- D. 0.50
Which of the following compounds will undergo additional reaction?
- A) Ethyne
- B) Butane
- C) Pentane
- D) Ethanol
Which of the following is the best starting material for the preparation of oxygen? Heating of trioxonitrate (v) with
- A) Pb
- B) Zn
- C) Ca
- D) Na
Which of the following is the most reactive towards bromine?
- A. Methane
- B. Benzene
- C. Ethyne
- D. Hexane
Which of the following mixtures is an example of a colloid?
- A. Milk
- B. Orange juice
- C. Saltwater
- D. Sugar dissolved in water