J Chemistry 18

The type of bonding in [Cu(NH₃)⁴]²⁺ is

The lUPAC name for

The situation obtained when a perfect gas expands into a vacuum is

The derivative of benzene that can be used in making explosives is

Which of the compounds is composed of Al, Si, O and H?

In electrovalency, the oxidation number of the participating metal is always

Beryllium and Aluminium have similar properties because they

What mass of Cu would be produced by the cathodic reduction of Cu²⁺ when
1.60A of current passes through a solution of CuSO₄ for 1 hour.
(F=96500Cmol−1,Cu=64)

The periodic classification is an arrangement of the elements

3CuO_(s) + 2NH_3(g) → 3Cu_(s) + 3H₂O_(l) + N_2(g) (i).
2NH_3(g) + 3Cl_2(g) → 6HCl_(g) + N_2(g) (ii).
4NH_3(g) + 3O_2(g) → 6H₂O_(l) + 2N_2(g) (iii).

The reactions represented by the equations above demonstrate the?

When air which contains the gases Oxygen, nitrogen, carbondioxide, water
vapour and the rare gases, is passed through alkaline pyrogallol and then over
quicklime, the only gases left are;

The alkanoic acid found in human sweat is

In the shown experiment (Fig. 1) the litmus paper will initially

The reaction between an organic acid and an alcohol in the presence of an acid
catalyst is known as

The general formula of alkanones is

The choice of method for extracting a metal from its ores depends on the

Which of the following statements is correct about the periodic table?

Aluminium does not react with either dilute or concentrated trioxonitrate (V) acid
because

A substance that is used as a ripening agent for fruits is

The number of electrons in the valence shell of an element of atomic number 14
is?

Which of the following separation techniques can be employed in obtaining
solvent from its solution?

Methanoic acid mixes with water in all proportions and has about the same
boiling point as water. Which of the following methods would you adopt to obtain
pure water from a mixture of Sand, water and methanoic acid?

A quantity of electricity liberates 3.6g of Silver from its salt. What mass of
aluminium Will be liberated from its salt by the same quantity of electricity? [Al =
27, Ag = 108].

The Sulphide which is insoluble in dilute hydrochloric acid is

An element X forms the following compounds with chlorine; XCl4, XCl3, XCl2.
This illustrates the

A correct electrochemical series can be obtained from Na, Ca, Al, Mg, Zn, Fe,
Pb, H, Cu, Hg, Ag, Au by interchanging

To what volume must 300cm³ of 0.60M sodium hydroxide solution be diluted to give a 0.40M solution?

According to the Kinetic Theory an increase in temperature causes the kinetic
energy of particles to

Which of the following is an example of a chemical change?

Which of these alloys contains copper?

Which of the following produces relatively few ions in solution?

3H₂(g) + N₂(g) ↔ 2NH₃(g) ; ΔH = -ve

In the reaction above, lowering of temperature will

Elements P, Q, R, S have 6, 11, 15, 17 electrons respectively, therefore,

An element used in the production of matches is

To what temperature must a gas at 273k be heated in order to double both its
volume and pressure?

Diamond is a bad conductor of electricity because its bonding electrons are used
in

2SO₂(g) + O₂(g) ↔ 2SO₃(g) ΔH = -395.7 kJmol^-1

In the equation, an increase in temperature will shift the equilibrium position to the

During the electrolysis of copper II sulphate between platinum electrodes, if
litmus solution is added to the anode compartment

What volume of oxygen will remain after reacting 8cm³ of hydrogen gas with 20cm³ of oxygen gas ?

The knowledge of half-life can be used to