Question Library — KalmiPrep by Kalmitech

Physics UTME / JAMB 1987 Current Electricity & Electric Circuits

In the fig above, M and N are insulated metal spheres in contact. A negatively charged ebonite rod P is I brought near M. When M and N are Separated and the rod is taken away, which of the following statements is correct

A

both M and N have acquired negative charges

B

both M and N have acquired positive charges

C

M has acquired negative charge and N positive charge

D

N has acquired negative charge and M positive charge

medium Difficulty

Physics UTME / JAMB 1987 Linear Motion, Projectiles & Kinematics

The velocity time graph above describes the motion of a particle between two points P and Q. What is the distance between P and Q?

Attached Figure / Diagram

A

17.0m

B

18.0m

C

22.5m

D

30.0m

medium Difficulty

Physics UTME / JAMB 1987 Elasticity, Density, Pressure & Fluids

A 50kg block is dropped from a point 10m above, as shown in the figure above. if the force constant of the spring is 4.0 x 10\(^4\)Nm-1, find the maximum compression of the spring. [g = 10ms\(^{-2}\)]

Attached Figure / Diagram

A

1.25m

B

0.50m

C

0.25m

D

0.05m

medium Difficulty

Physics UTME / JAMB 1987 Work, Energy, Power & Simple Machines

fig above represents the main sequence of energy conversion at kainji dam. what is the efficiency of the system?

Attached Figure / Diagram

A

\(\frac{Q_1}{Q_2}\)

B

\(\frac{E}{Q_1}\)

C

\(\frac{E}{Q_1 - Q_2}\)

D

\(\frac{E}{Q_1 + Q_2}\)

medium Difficulty

Physics UTME / JAMB 1987 Current Electricity & Electric Circuits

In the above, a voltage V is applied across the terminals P and Q. The voltage across the 1 ohm resistor is

Attached Figure / Diagram

A

V/8

B

V/4

C

V/3

D

V/2

medium Difficulty

Physics UTME / JAMB 1987 Current Electricity & Electric Circuits

In the fig above, M and N are insulated metal spheres in contact. A negatively charged ebonite rod P is I brought near M. When M and N are Separated and the rod is taken away, which of the following statements is correct

Attached Figure / Diagram

A

both M and N have acquired negative charges

B

both M and N have acquired positive charges

C

M has acquired negative charge and N positive charge

D

N has acquired negative charge and M positive charge

medium Difficulty

Chemistry UTME / JAMB 1987 Stoichiometry, Mole Concept & Volumetric Analysis

The reaction between sulphur (IV) oxide and oxygen is represented by the equilibrium reaction 2SO2(g) + O2(g) ↔ 2SO3(g), ∆H = -196 kJ. What factor would influence increased production of SO3(g)?

A

Addition of a suitable catalyst

B

Increase in the temperature of the reaction

C

Decrease in the temperature of the reaction

D

Decrease in the concentration of SO2(g)

medium Difficulty

Chemistry UTME / JAMB 1987 Nature of Matter & Separation Techniques

Magnesium ribbon was allowed to burn inside a given gas P leaving a white solid residue Q. Addition of water to Q liberated a gas which produced dense white fumes with a drop of hydrochloric acid. The gas P was?

A

nitrogen

B

chlorine

C

oxygen

D

sulphur (IV) oxide

medium Difficulty

Chemistry UTME / JAMB 1987 Stoichiometry, Mole Concept & Volumetric Analysis

The best treatment for a student who accidentally poured concentrated tetraoxosulphate (VI) acid on his skin in the laboratory is to wash the skin with?

A

cold water

B

sodium hydroxide solution

C

iodine solution

D

sodium trioxocarbonate (IV) solution

medium Difficulty

Chemistry UTME / JAMB 1987 Non-Metals & Their Compounds

In which of the following pairs of element is allotropy exhibited by each element?

A

Phosphorus and hydrogen

B

Oxygen and chlorine

C

Sulphur and nitrogen

D

Oxygen and sulphur

medium Difficulty

Chemistry UTME / JAMB 1987 Non-Metals & Their Compounds

Which of the following gases can best be used for demonstrating the fountain experiment? i) Nitrogen (ii) Ammonia (iii) Nitrogen (I) oxide (iv) Hydrogen chloride.

A

ii and iii

B

i and iii

C

ii and iv

D

ii only

medium Difficulty

Chemistry UTME / JAMB 1987 Stoichiometry, Mole Concept & Volumetric Analysis

When sodium hydroxide is heated with ammonium tetraoxosulphate (IV), the gas given off may be collected by?

A

bubbling it through concentrated H2SO2

B

bubbling it through water and then passing it through calcium oxide

C

passing it directly through calcium oxide

D

passing it directly through calcium chloride

medium Difficulty

Chemistry UTME / JAMB 1987 Stoichiometry, Mole Concept & Volumetric Analysis

Which of the following elements will form oxide which will dissolve both in dilute HNO3 and NaOH solutions to form salts?

A

Al

B

Mg

C

Ag

D

Mn

medium Difficulty

Chemistry UTME / JAMB 1987 Metals, Transition Elements & Extraction

Stainless steel is an alloy of?

A

Iron, carbon and silver

B

iron, carbon and lead

C

iron, carbon and chromium

D

iron and carbon only

medium Difficulty

Chemistry UTME / JAMB 1987 Electrolysis & Electrochemical Cells

Alloys are best prepared by?

A

high temperature weilding of the metals

B

electrolysis using the major metallic component as cathode

C

reducing a mixture of the oxies of the elements

D

cooling a molten mixture of the necessary elements

medium Difficulty