What is the correct burette reading in mL?
Which of the following would be a possible industrial source of sulfur dioxide?
The concentration of chloride ion in river water was determined by titration with AgNO3 solution using a suitable indicator. 25.00 mL samples of river water were titrated with 1.034 x 10–2 mol L–1 AgNO3. The average titre was 22.60 mL. What is the concentration of the chloride ion in the river water?
A sample was tested for its approximate pH using several indicators. The results are given in the table.
What products would result from the catalytic cracking of a 15-carbon alkane?
How many structural isomers can the compound with the molecular formula, C2H3Cl2F have?
In order to determine the relative activity of four metals, each metal was placed in the salt solutions of the other metals and observed for signs of a reaction. The results are displayed in
What are the volumes in litres of 1 mole of helium gas and 1 mole of nitrogen gas respectively at 25 oC and 100 kPa ?
In which of the following alternatives are the compounds listed in order of increasing boiling point ?
Which of the following chemicals would decolourise bromine water the quickest in the presence of UV light?
The half-equations for the vanadium redox cell are given below.
Ozone exhibits greater reactivity than the oxygen molecule. Which statement best explains this?
Which of the following is a Bronsted- Lowry acid – base reaction?
The molar heat of combustion of ethanol is 1367 kJ mol-1. A 2.510 g sample of ethanol was combusted in heating a certain mass of water from 25oC to 45oC. 80% of the heat released was absorbed by the water. What was the quantity of water heated?
Which of the following changes will always shift equilibrium to the left ?