O level north west regional mock gce 2022 chemistry 1
O level north west regional mock gce 2022 chemistry 1
If fertilizers ore chosen according to the percentage
of Nitrogen In them, which of the following fertilizers
|8the richest in Nitrogen?
N=14,O=10,5=32/P=:31,Ca-40)
weakly acidic- Gas X turns lime water milky and does
not support combustion. Gas X is most likely to be:
A Chlorine ,
It Carbon dioxide
C Carbon monoxide
I) Sulphur
Tll low many moles of electrons are needed to
deposit 6.4g of copper during the electrolysis of
copper (11) sulphate? (R.A.M of Cu:-64)
A 0.2moles
B 2moles
C 0.1mole
D 0.02moles
in water to form a solution which is
electrolyte both when molten and when dissolved In
water?
A Iron
0 sugar
C common salt
I) Sulphur
a
. The metal that liberates hydrogen from cold water
and bursts into flames Is:
5. What anhydrous Is thesodium concentration carbonate in moldrrTrof (NajCCh) dissolved l0^6g ofin
7. Which of the following ehange(s) occurs when a
candle burns;
A Chemical
It Chemical and physical
C Physical
I) Melting
13. The conversion of Fe2 k(aq) to Fe3 (aq) can be
carried out by bubbling
A Hydrogen sulphide into an aqueous solution of
FC3+.
B Hydrogen sulphide into an aqueous solution of
C Chlorine into an aqueous solution of Fe
I) Chlorine into an aqueous solution of Fe3+
14. The equilibrium reaction below is used in the
manufacture of ammonia.
N2(fO + 3H2(g) z==~z
Hie yield ol NM
A: the pressure ^will decreases increase if:
B: the temperature decreases
C: the temperature increases
0: a catalyst is used.
15. Which process is used to obtain kerosene,
and diesel in an oil company?
A: Fermentation
B: Electrolysis
C: Fractional distillation
U: Cracking
8. Choose an isomer of butane (ClhCH2CIl2CH3)
A C4H10,
B ClbqDh) CH3
C CHjCil(CHi) CH3
P C I I3CH(CHI) C) I3CII3 _
9. The attractive force that Is responsible for the
existence of halogens In various physical states at
n. f.P. Is called:
A Covalent bond
