Ch 14

1

The raw material for urea manufacture includes:

A Ammonia and carbon dioxide B Nitrogen and oxygen C Sulphur dioxide D Methane only

2

Increasing pressure shifts equilibrium towards the side with:

A More moles of gas B Equal moles of gas C Less moles of gas D No gas molecules

3

A substance that accepts a proton is known as:

A Bronsted–Lowry base B Arrhenius acid C Lewis acid D Neutral compound

4

Acid rain is mainly caused by oxides of:

A Nitrogen and sulphur B Carbon and hydrogen C Oxygen and nitrogen D Chlorine and fluorine

5

An increase in temperature favors the:

A Endothermic reaction B Exothermic reaction C Neutral reaction D No reaction

6

At equilibrium, the concentration of reactants and products:

A Are always equal B Become zero C Remain constant with time D Increase continuously

7

Which industrial product is obtained from sulphuric acid?

A Soap B Fertilizers C Glass D Cement

8

Which substance is used to neutralize acidic soil?

A Sodium chloride B Calcium carbonate C Ammonium sulphate D Nitric acid

9

The pH of acid rain is usually:

A Above 7 B Equal to 7 C Below 7 D Equal to 14

10

Which gas is mainly responsible for global warming?

A Oxygen B Nitrogen C Carbon dioxide D Hydrogen

11

A strong acid is one that:

A Partially ionizes B Completely ionizes C Does not ionize D Forms salts only

12

For a reversible reaction, if Kc is very large, it indicates:

A Reaction favors reactants B Reaction favors products C Reaction is very slow D No reaction occurs

13

According to Arrhenius theory, an acid is a substance that produces:

A OH⁻ ions in water B H⁺ ions in water C Salt in water D Electrons

14

Natural gas mainly consists of:

A Ethane B Methane C Propane D Butane

15

Chemical equilibrium is called dynamic because:

A The reaction stops completely B Forward and reverse reactions continue at equal rates C Reactants are used up D Products decompose continuously

16

Le Chatelier’s principle states that when a system at equilibrium is disturbed:

A It stops reacting B It adjusts to counteract the change C It decomposes D Temperature remains unchanged

17

The major cause of air pollution in cities is:

A Forest fires B Volcanoes C Vehicle exhaust D Rainfall

18

Which salt is commonly used in food?

A Sodium carbonate B Sodium chloride C Calcium sulphate D Ammonium nitrate

19

A substance that can donate a proton is called:

A Lewis acid B Arrhenius base C Bronsted–Lowry acid D Bronsted–Lowry base

20

A solution with pH less than 7 is:

A Basic B Neutral C Acidic D Saline

21

The main function of fertilizers is to:

A Kill pests B Increase soil fertility C Control pollution D Increase rainfall

22

The equilibrium constant changes with change in:

A Concentration B Pressure C Temperature D Catalyst

23

Water pollution is caused by:

A Industrial waste B Agricultural runoff C Domestic sewage D All of these

24

Chemical fertilizers mainly supply:

A Carbon B Nitrogen, phosphorus and potassium C Oxygen only D Sulphur only

25

The equilibrium constant (Kc) is expressed in terms of:

A Initial concentrations B Equilibrium concentrations C Rate of reaction D Temperature only