The rate of a chemical reaction is NOT affected by one of these factors
colour
concentration
presence of light
surface area
temperature
Correct answer is A
No explanation has been provided for this answer.
The molecular formula of ethylbutanoate is?
CH5COOC26
C3HCOOC2H7
C3H7COOC3H7
C3H7COOC4H9
C3H7COOC2H5
Correct answer is E
No explanation has been provided for this answer.
Which of the following is a component of the car exhaust?
Aluminium
Calcium
Iron
Zinc
Lead
Correct answer is E
No explanation has been provided for this answer.
Adding some distilled water
Decreasing the temperature
Diluting the hydrochloric acid
Grinding the metal into powder
Increasing the pressure
Correct answer is D
No explanation has been provided for this answer.
What is the colour of phenolphthalein indicator in a basic medium?
Blue
Colourless
Orange
Pink
Yellow
Correct answer is D
No explanation has been provided for this answer.