JAMB Past Questions and Answers - Page 1266

6,326.

2-methylprop-1-ene is an isomer of?

A.

3-methyl but-1-ene

B.

2-methyl but-1-ene

C.

but-2-ene

D.

pent-2-ene

Correct answer is C

somers of Butene: are But-1-ene, But-2-ene, 2-Methylpropene / 2-methylprop-1-ene

6,327.

A certain hydrocarbon on complete combustion at s.t.p produced 89.6dm\(^3\) of CO\(_2\) and 54g of water. The hydrocarbon should be?

A.

C\(_6\)H\(_6\)

B.

C\(_4\)H\(_{10}\)

C.

C\(_5\)H\(_{10}\)

D.

C\(_4\)H\(_6\)

Correct answer is D

C\(_x\)H\(_y\) + (x + y/4)O\(_2\) \(\to\) x CO\(_2\) + y/2 H\(_2\)O

89.6 dm\(^3\) \(\to\) x moles CO\(_2\)

22.4 dm\(^3\) \(\to\) 1 mole CO\(_2\)

x = \(\frac{89.6}{22.4}\)

= 4 moles CO\(_2\)

54g of H\(_2\)O \(\to\) k moles H\(_2\)O

18g H\(_2\)O \(\to\) 1 mole H\(_2\)O

k = \(\frac{54}{18}\)

= 3 moles H\(_2\)O

From the equation above,

x = 4 

k = y/2 = 3

y/2 = 3 \(\implies\) y = 6

\(\therefore\) The hydrocarbon C\(_x\)H\(_y\) = C\(_4\)H\(_6\)

6,328.

The IUPAC name for CH\(_3\)CH\(_2\)COOCH\(_2\)CH\(_3\) is

A.

methylpropanoate

B.

ethylethanoate

C.

ethylpropanoate

D.

methylethanoate

Correct answer is C

No explanation has been provided for this answer.

6,329.

i Operating machines
ii Furniture
iii Fixtures and fitting
iv Loan from friends
V Creditors

What are the current liabilities?

A.

i and ii

B.

iv and v

C.

iii and v

D.

ii and iv

Correct answer is B

Current Liabilities = Notes payable + Accounts payable + Accrued expenses + Unearned revenue + Current portion of long term debt + other short term debt.

From the question above, Loans from friends and creditors are liabilities the rest are assets

 

6,330.

If Odukoya takes money out of business bank account for his own private use, the effect of the transaction is?

A.

Increase in assets and increase in capital

B.

Increase in liabilities and decrease in capital

C.

Decrease in capital and increase in assets

D.

Decrease in capital and decrease in assets

Correct answer is C

Drawings is the withdrawals from a business by a business owner for his personal use. It represents a reduction of owners' equity (capital) in the business. 

 Drawings account have a debit balance which increases assets (remember in the balance sheet, assets are recorded on the debit side of the account while liabilities have a credit ballance). Hence drawings would reduce owners capital and increase the asset balance.