Group lll, period 3
Group lll, period 5
Group V, period 3
Group V, period 5
Correct answer is C
the element belongs to group 5, since we have two coefficients that are the same we simply add the powers that give 5. while the highest coefficient gives the period that is 3.
therefore, the element is found in group 5 period 3.
Which of the following statements about soapless detergents is correct? They
lather readily with hard water
increase the surface tension of water
cause hydrolysis of salts in water
from a curdy precipitate with soft water
Correct answer is A
No explanation has been provided for this answer.
The following compounds are hydrocarbons except
methylpropanoate
2-methylbutane
benzene
cyclohexane
Correct answer is A
No explanation has been provided for this answer.
When alkynes are hydrogenated completely, they produce compounds with the general molecular formula
C nH n
C nH 2n+2
CnH 2n
CnH2n-2
Correct answer is B
when alkyne(\(C_nH_{2n - 2}\)) are hydrogenated completely, alkanes( \(C_nH_{2n + 2}\)) are produced.
Which of the following compounds can be represented by the molecular formula C2H6O?
Propanel
Ethanol
Methanoic acid
Glucose
Correct answer is B
No explanation has been provided for this answer.