FUTO Chemistry 2017/2018 - Model 1 Past Questions

Practice each question, then open it to see the full details.

When water boilers are used for a long period of time, the solid substances left behind as scale are

A.magne-sium trioxosilicate (IV) and trust
B.magnesium trioxosilicate (IV) and calcium tetraoxosulphate (VI)
C.clay and magnesium trioxosilicate (IV)
D.clay and rust

How many lone pair(s) of electrons is present in HF?

A.0
B.1
C.2
D.3

Which of the following metals is the strongest reducing agent?

A.sodium
B.silver
C.potassium
D.copper

A solution of sodium trioxocarbonate(IV)contains 10.6g in 250cm³ of soluttion. Calculate the concentration of the solution.[$${Na_2CO_3 = 106.0}$$]

A.0.4moldm^-3
B.1.0moldm^-3
C.10.6moldm^-3
D.25.0moldm^-3

Which of the following metals exists as liquid at ordinary temperature?

A.Copper
B.Gold
C.Mercury
D.Silver

Which of the following equinolar solutions will have the highest pH?

A.CH₃COONa
B.NaOH
C.HCI
D.NH₄OH

Which of the following are structural isomers?

A.Propanoic acid and propan-1,2-diol
B.Propanal and propanone,
C.Ethanoic acid and propanoic acid
D.Ethan-1,2-diol and ethanoic acid

25cm³ of a mixture oof noble gases was obtained from air after the removal of other constituents. What was the original volume of air?

A.2500cm³
B.1250cm³
C.125cm³
D.80cm³

How many moles of limestone will be required to produce 5.6g of CaO? [ Ca=40, C=12, 0 =16].

A.0.20 mol
B.0.10 mol
C.1.12 mol
D.0.56 mol.

An element will readily form an electrovalent compound if its electron configuration is

A.2, 8, 1
B.2, 8, 4
C.2,8, 8
D.2, 8, 5