What is the correct burette reading in mL?
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 ?
Which of the following chemicals would decolourise bromine water the quickest in the presence of UV light?
A sample was tested for its approximate pH using several indicators. The results are given in the table.
Ozone exhibits greater reactivity than the oxygen molecule. Which statement best explains this?
Why is radon-226 a radioactive isotope?
What is the IUPAC name of the following compound ?
Which of the following would be a possible industrial source of sulfur dioxide?
The half-equations for the vanadium redox cell are given below.
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?
What is the systematic name of the following compound?
20 mL of 0.08 mol L–1 HCl is mixed with 30 mL of a 0.05 mol L–1 NaOH. What is the pH of the resultant solution ?
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 products would result from the catalytic cracking of a 15-carbon alkane?
Which of the following is a Bronsted- Lowry acid – base reaction?