POST UTME MOCK

A sample of orange juice has a P of 3.80. What is the molar concentration of hydrogen ion in the juice?

(d)1.58x 105

• (a) 1.58 x l04

• (b) 1-58 x l02

• (c)1.58x103

• (d)1.58x 105

Which of the following is not acidic?

(d) Silver chloride

• (a) Aluminum chloride

• (b) Zinc chloride

• (c) Copper (II) tetraoxosulphate(VI)

• (d) Silver chloride

Calculate the current in amperes required

to produce 1 8.Og of Aluminum in 1.50

hours

• (a) 33.65A

• (b) 35.74A

• (c) 37.83A

• (d) 39.35A

The two nuclei of the hydrogen molecule are held together by

• (a) mutual attraction

• (b) mutual sharing of elections

• (c) a dative covalent bond

• (d) the two electrons having the same spin,

Which of the following statements about catalysis is correct?

(i) A small amount of catalyst often affect the rate of

chemical reactions for a long time (ii) A catalyst is always chemically unchanged at the end of the reaction (iii) The

effect of a catalyst is often enhanced by adding promoters (iv) A catalyst is always physically unchanged at the end of

the reaction (v) A catalyst speeds up the rate of chemical reactions

• (a) ii, iii, iv, v

• (b) I, ii, iii only

• (c) ii, iii, iv only

• (d) ii and iv only

Which of the following statements is not line for Hydrogen Sulphide?

• (a) It is a liquid at room temperature

• (b)it is a covalent compound

• (C) It is a much stronger reducing agent than water

• (D) It is a much stronger reducing agent than water.

• (E) It is a gas at room temperature

When illuminated by a light beam, a smoke particle in oxygen can be seen moving in different direction all the time

when viewed in a microscope. This is because

• (a) the light beam intensity is not constant

• (b) the smoke particle is affected by gravity

• (c) oxygen molecules hit the smoke particles at different directions

• (d) the smoke particle has a high speed in oxygen.

A siren having a ring of 200 holes make 132 revolutions per minutes, a jet of air is directed on to the set of holes;

calculate the frequency of the note produced. (Speed of sound in air – 350m/s)

• (a) 26.011

• (b)1.5211

• (c) <100M/

• (d) 8.66Hz

A pool of Water is 1 2m deep, what is the apparent depth? (Refractive index of water-4/3)

• (a) 1.60

• (b) 48.0m

• (c) 9.0m

• (d) 36.Om

Which one of the following is not a contact force?

• (a) Gravity .

• b) Viscosity.

• (c) Tension .

• (d) Reaction.