How many moles of carbon(iv)oxide contains 16.0g of oxygen? [ C = 12.0, O = 16.0 ]
0.20 mol
0.25 mol
0.40 mol
0.50 mol
Correct answer is D
1 Mole of carbon(iv)oxide contains 32g of Oxygen
: 0.5 Mole of carbon(iv)oxide contains 16g of Oxygen
Saturated
Unsaturated
Concentrated
Diluted
Correct answer is A
The term saturated solution is defined in chemistry as a solution in which no more solute can be dissolved in the solvent.
Ethene and Ethyne
Ethane and Ethene
Carbon (ii) Oxide and Ethene
Carbon (iv) Oxide and Ethyne
Correct answer is C
Ethene = 28
Ethyne = 26
Carbon(ii)Oxide = 28
Carbon(iv)Oxide = 44
Which of the substances is non-polar?
Bromine
Ammonia
Water
Hydrogen Bromide
Correct answer is A
Br2 (Bromine) is nonpolar because, in this molecule, both bromine atoms have the same electronegativity due to which both atoms have equal charge distribution and results in a net-zero dipole moment.
Calcium and magnesium belong to the group of the periodic table because both?
are metals
form cations
form colourless salts
have same number of valence electrons
Correct answer is D
No explanation has been provided for this answer.