What weight of sodium hydroxide is required to make 500cm3 of 0.2M solution?

Which of the following substances increases in mass when heated in air?

Equilibrium is sad to be attained in a reversible reaction when

Esterification of propane 1, 2, 3-triol and unsaturated higher carboxylic acids will produce

Element P, Q, R and S have 6, 11, 15 and 16 electrons respectively, therefore,

At 25oC and 1atm, a gas occupies a volume of 1.50dm3. What volume will it occupy at 100 oC and 1atm?

The IUPAC names for the compounds CH3COOH and CH2 = CH2 are respectively;

The movement of liquid molecules from the surface of the liquid to the gaseous phase above it is known as

The molecular formula of a common organic laboratory anesthetic is

An element X forms the following compounds with chlorine: XCl4, XCl3, XCl2. This illustrate the

The principal constituents of natural gas is

The weakest attractive force that can be observed between two molecules is

A gaseous mixture of 80.0g of oxygen and 56.0g of nitrogen has a total pressure of 1.8atm. The partial pressure of oxygen in the mixture is

0.499g of CuSO4.XH2O when heated to constant weight gave a residue of 0.346g. What is the value of X?

The following uses radioactive isotopes except for

The greenhouse effect is a climatic condition associated with the presence of excess

Organic Chemistry is the branch of Chemistry that deals with ------- and ------

Cotton is almost pure

Which quantum number divides shells into orbitals?

The percentage of water of crystallization in ZnSO4. 7H2O is

The following are uses of sulphur except

Pauli exclusion principle is related to

Which of the following halogens is the most reactive?

Lucas reagent is used to test for

A mixture of sugar and sulphur can be separated by

Which of the following is not a member of the homologous series of the paraffins?

Which of the following types of reactions takes place between C2H4 and the halogens?

Organic molecules that have the suffix-ene are unsaturated hydrocarbons that have

Which of the following is an acidic salt?

Copper metal dissolves in concentrated trioxonitrate (v)  acid with the resultant evolution of

The carbon atoms on ethane are

The following are uses of sulphur except

Which of the following gases can be collected by the method of downward delivery?

3.0g of a mixture of potassium carbonate and potassium chloride were dissolved in a 250cm3 standard flask.25cm3 of this solution required 40.00cm3 of 0.01M HCl for neutralization. What is the percentage by weight of k2CO3 in the mixture? (k = 39, O = 16, C = 12)

In the Periodic Table, the elements that lose electrons most readily belong to

The metal extracted from cassiterite is

The major source of oxides of nitrogen is from the burning of

Alkanals can be differentiated from alkanones by reaction with

The oxidation number of chlorine is +1in

Catalytic hydrogenation of benzene produces

0.0075 mole of calcium trioxocarbonate (iv) is added to 0.015 mole of a solution of HCl. The volume of gas evolved at S.T.P is

Given that the molecular mass of iron is 56 and that of oxygen is 16, how many moles of iron (III) oxide will be contained in 1kg of the compound?

Which of the following properties increases down a group in the Periodic Table

Calcium atom ionizes by

An amphoteric oxide is an

A current of 4.0 amperes was passed through copper (II) tetraoxosulphate (IV)       solution for one hour using copper electrodes. What was the mass of copper deposited? (Cu =64, IF = 96500C)

The greenhouse effect is a climatic condition associated with the presence of excess

When a solution of silver (I) nitrate is saturated with hydrogen sulphide, a black precipitate forms which is

Which of the following is needed to produce a slag during the extraction of iron in the blast furnace?

Palm wine turns sour with time because