To what temperature must a gas at 273k be heated in order to double both its volume and pressure?
298K
546K
819K
1092K
Correct answer is D
No explanation has been provided for this answer.
Which of the following is an example of a chemical change?
dissolution of salt in water
rusting of iron
melting of ice
separating a mixture by distillation
Correct answer is B
No explanation has been provided for this answer.
The type of bonding in [Cu(NH\(_3\))\(^4\)]\(^{2+}\) is
coordinate
electrovalent
metallic
covalent
Correct answer is A
No explanation has been provided for this answer.
What is the PH of 0.00 1 moldm\(^3\) solution of the sodium hydroxide
14
13
12
11
Correct answer is D
No explanation has been provided for this answer.
A substance that is used as a ripening agent for fruits is
ethene
propane
methane
butane
Correct answer is A
No explanation has been provided for this answer.