Chemistry 2014

What is the molecular formula of a compound whose empirical formula is CH₂O and molar mass is 180? (H=1, C12, 0=16)

Which of the following pollutants is biodegradable?

Which of the following equations represents the reaction leading to the removal of permanent hardness of water?

How many mole of AgNo₃, are there in 500cm³ of 0.01 MAgNO, solution?

Which of the following statements explains why tetraoxosulphate (IV) acid is regarded as strong acid?

To what temperature must a gas be raised from 273K in order to double both its volume and pressure?

If 3 moles of electrons are required to deposit 1 mole of a metal, during the electrolysis of its molten chloride, the empirical formula of the metallic chloride is;

Nuclear reactions can be used in the following except

Which of the following compounds crystallizes without water of crystallization?

The products of the electrolysis of dilute sodium chloride solution with platinum electrodes are

Which of the following statements is not correct of Group 7 elements?

Which of the following correct? Cathode rays

CH_4(g) + 2O₂ —> 2H₂O₍₁₎ + CO_2(g)∆H = 890Kjmol^-1 ∆H in the reaction represented by the equation is called the enthalpy of:

Compounds that have the same molecular formula but structures are said to be

When a crystal was added to its solution, it did not dissolve and the solution remained unchanged, showing that the solution was:

When steam is passed over white-hot coke, the products are:

The maximum number of electrons that can be accommodated in the shell having the principal quantum number 3 is;

Methanol is obtained from wood by

Study carefully the reaction represented by the equation
2H₂O₂(l) —> O₂(g) + 2H2O (l)
Which o the following will not Increase the reaction rate?

Which of the following processes is a physical reaction?

The following acids are monobasic except

The rate of a reaction is proportional to the number of effective collisions occurring per second between the Reactants. This statement is associated with the

In the reaction represented by the following equation;

2H₂S(g) + S0₂(g) → 2H₂O(l)+3S(s)+S0₂ is acting as

When iron rusts, it undergoes

The following salts are readily soluble in water except:

When sucrose is warmed with Fehlings solution

The ionic radii of metals are usually

Which of the following compounds is not a raw material for the manufacture of plastics?

The energy required to remove the most loosely bound electron from an atom in the gaseous static is known as the

If a reaction is said to be exothermic, which of the following statements is a correct deduction from the information?

Which of the following pH values is likely to be that of a slightly alkaline Solution?

Which of the following minerals contain; fluorine as one of its constituent elements?

The product of the reaction between propanoic acid and ethanol is

Which of the following accounts for the difference in the mode of conduction of electricity by metals and aqueous salt solution is?

Starch undergoes complete hydrolysis to produce

Which of the following solids has a network structure?

The properties of electrovalent compounds include the following except:

Which of the following pairs illustrates isotopy?

Carbon is often deposited in the exhaust-pipe of cars because of the

Sulphur burns in air to form

Chlorine is used in water treatment as

What amount of copper will be deposited if a current of 10A was passed through a solution of copper (II) salt for 965 seconds? (IF=96500C, Cu=63:5)

Consider the reaction represented by the following equation:
CaCl_2(aq) +H₂C₂O_4(aq) → CaC₂O_4(s) + 2HCl_(aq)
which of the following would dissolve the precipitate of CaC₂O₄ formed?

What volume of distilled water should be added to 400cm^-3 of 2.0 mole dm³ H₂S0₄ to obtain 0.20 moldm^-3 of solution?

What volume of propane is left unreacted when 20cm³ of oxygen and 20cm³ propane react according to the following equation?

C₃H₈+5O₂(g) → 3CO₂(g)+ 4H₂0

The component to air that is removed when air is bubbled into alkaline pyrogallol solution is:

Which of the following compounds of tin is a strong reducing agent?

Which of the following pairs are both substances deliquescent?

An alkene may be converted to an alkane by

The product of the reaction between ethanol and excess acidified K₂Cr₂O₇ is; acid

What does the following equation illustrate?
²³⁸₉₂ U → ²³⁴₉₀ Th + ⁴₂He

Zinc displaces copper from an aqueous solution of copper (II) salt because

The components of universal indicator solution can best be separated by

When naphthalene on heating changes from the solid state directly to the gaseous state, it undergoes

How many faradays of electricity are required to liberate 9g of aluminum? (Al=27)

Mg(s) + 2HCl(aq) → MgCl₂(aq)+ H₂(g)
From the equation above, what mass of hydrogen would be produced if 12.0g of magnesium reacted completely with dilute hydrochloric acid? (H=1, Mg = 24)

Alkanols have unexpectedly high boiling points relative to their molar masses cause of intermolecular

If an element X with electronic configuration 2,8,3, combines with another element Z with electronic configuration 2,8,6, the compound formed will have the formula

Which of the following molecules is linear in shape?

What is the percentage by mass of copper in copper (I) oxide (Cu₂ 0)? [0=16; Cu=64]

The most suitable method for preparing lead (II) chloride is by

Sodium chloride cannot conduct electricity in the solid state because it

Alums are classified as:

H₃O⁺ _(aq) +OH _(aq) → 2H₂O
The heat change accompanying the process represented by this equation is the heat of

In which of the following processes are larger molecules broken down into smaller molecules?

What is the amount (in mode) of hydrogen gas that would be produced if 0.6 mole of hydrochloric acid reacted with excess zinc according to the following equation?
Zn(s)+2HCI(aq) →  ZnCI₂(aq)+H₂(g)

Chlorine is prepared on a large scale by the

Which of the following statements is correct about the following system at Equilibrium?
PCl₅(g) →PCI₃(g) + Cl₂(g)  ΔH = positive

Isotopes of a given element have the same:

Which of the followng statements is not correct about catalysts?They

If the change in free energy (∆G) in a reaction is negative, it can be deduced that the reaction will

Which of the following denotes an alpha particle?

When an atom gains an electron, it becomes:

Equal volumes of all gases at the same temperature and pressure contain the same number of molecules’ is an expression of

The following acids are monobasic Except

An arrangement of two different metals in aqueous solutions of their salts to produce an electric current is known as

The rate of production of hydrogen gas from the reaction between zinc granules and hydrochloric acid can be increased By

Nitrogen is prepared on a large scale by the

Which of the following metals will be the most suitable for use where lightness and resistance to corrosion are of importance?

The products formed when sodium hydrogen trioxocarbonate (IV) is heated strongly are

Pipe borne water is usually chlorinated in  order to:

In linear molecules, the bond angle is

An increase in the pressure of a gas results in a decrease in its

An acid is a substance which in the presence of water produces

Which of the following ions will migrate to the cathode during electrolysis?

What quantity of electrons (in mole) is lost when one mole of iron (II) ions is oxidized to iron (III) ions?

The position of equilibrium in a reversible reaction is affected by

Ethene undergoes mainly-additional ions because it is

The reaction between alkanoic acids and alkanols in the presence of a mineral acid is known as

Which of the following is used widely in the manufacture of flavours and perfumes?

When chlorine is added to slaked lime, the product obtained is

Which of the following, when heated strongly in air will leave a metal as residue?

Which of the following methods is suitable for the preparation of an insoluble Salt?