Advanced level 2025 North West regional mock Chemistry 1

Advanced level 2025 North West regional mock Chemistry 1

Advanced level 2025 North West regional mock Chemistry 1

past questions and solutions download kawlo kawlo app or visit http://www.gcerevision.com

37 (Thirty-seven questions). Directions: Each of the questions or incomplete statements in this section is followed by four suggested answers. Select the best answer in each case.  

1. Which of the following compounds will form

hydrogen bonds? A, HF  

B.

CHCl3

C. PH

D. SiH

:

2. Which element when burnt in oxygen produces an

oxide which is a reducing agent? A. Na  

B. Mg

C. S

D. AI

11. In which of the following species are the bond angles

approximately the same? A. H₂O and H_3O+  

B. NH3 and $H\_2O$

NH3and H_3O+

D. CHa and H_3O+

12. Which of the following changes will result in an

increase in the rate of a chemical reaction? A. Decrease in temperature  

B. Decrease in pressure

C. Decrease in activation energy

D. Decrease in concentration of reactants

13. The coordination number of cobalt in the complex ion

$[Co(en)\ast 2Cl\ast 2]$ is:

A. 2

3. Alkenes undergo:

A. Nucleophilic substitution reactions

B. Electrophilic substitution reactions

C. Electrophilic addition reactions

D. Nucleophilic addition reactions

4. The formula of the most stable chlorides of each of the

elements is:

A. $CCl\_2$,

$PbCl\_2$

B.

$CCl\_3,$ $PbCl\_3$

C.

$CCl\_2,$ PbCl4

D.

$CCl\_2$ PbCl2

5. Select the specie which has a dative covalent

A.

$NH\_3$

B.

SO_32−

C. CO_32−

D. mathcalNH_4+

6. When ethanol is warmed with aqueous acidified

dichromate, H1/Cr_2O_72−

A. Orange to green

B. purple to green

C. yellow to green

D. pink to green

7. 0.13g of a volatile liquid on evaporation gave a vapour

that occupied a volume of 240cm3 at 20circand

760mmlig, the relative molecular mass of the liquid

A. 32

B. 46

C. 13

D. 44

8. The general outer electronic configuration of the group

V elements is:

А. np5

B. ns2np5

C. ns2np4

D. ns2np3

9. Which of the following pairs of particles are

isoelectronic? A. Na+ Na  

B. $CbackslashS$

C. Na, Mg

D. Na. Mg  

10. The four main operations of the mass spectrometer in order of execution include:

A. Vapourization, ionization, acceleration, deflection

B. Vapourization, acceleration, ionization, deflection

C. Acceleration, vapourization, ionization, deflection

D. Ionization, acceleration, deflection, vapourization

B. 4

C. 5

D. 6

14. Which of the following tetrachlorides of group IV will

not react with water? A. $CCl\_4$  

B. $SiCl\_4$

C. $SnCl\_4$

D. PbC14

com

15. Bromine can be produced from the following

reaction;5Br r_(aq)pmBrOcirc∗(aq)+6H−∗(aq)rightarrow3Br_2(l)+3H_2O Which two methods could be used to monitor the

rate of the reaction? A. Conduetivityand dilatometry  

B. Colorimetry and dilatometry

C. Conductimetry and Colourimetry

D. Titrimetry and dilatometry

16. What is the hydration energy of cesium chloride given

that the lattice energy is $-6574kj/mol$ and its heat of

solution is $+19kj/mol$

A. $-655kj/mol$

B. $+655ki/mol$

C. $-6593ki/mol$

D. $+6593ki/mol$

17. Identify the particle X in the nuclear reaction

_24He+beginmatrix147endmatrixfrac11dotH+X by giving its mass number and atomic number. A. 17 and 8 respectively  

B. 19 and 2 respectively

C. 19 and 8 respectively

D. 17 and 10 respectively

18. On addition of 20cm3 of distilled water to S0cm3 of a

0.05moldm of hydrochloric acid solution, the

concentration of the acid will change to

B. 0.2moldm−3

A. 0.02moldm−3

C.

0.4moldm−3

D.

0.04moldm−3

19. Which of the following will change the value of Kc? A. Concentration changes  

B. Pressure changes

C. Temperature change

D. Employing a catalyst

20. Which of the following reagents are the most suitable

to distinguish between ethanal (CH3CHO) and

propana! $(CH\_3CH\_2CHO)$  

A. Ammoniacal $AgNO\_3$

B. 2,4-Dinitrophenylhydrazine

C. $PCl\_5$

OTRU/RPI NWCTA/0715/P1/MOCK 2025

D.

D.12/NaOH

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