AIDS is a killer disease because:

A reaction that gives out heat is said to be:

Ammonia gas spreads out faster than hydrogen chloride, showing that it is:

An electron, with its charge of 1.6 × 10^-19 C, is moved from one place at +8 V to a different place which is at 0 V.The energy released will be:

All of these are trace elements EXCEPT for:

One example of an emulsifying agent is:

Asexual reproduction produces:

All of these are ordered crystalline structures EXCEPT for:

Which of the following is a subset of {b, c, d}?

The standard atom used for mass calculations is:

0.045 × 10^-3 in scientific notation is

In the reactivity series of metals the order is: sodium, calcium, magnesium, aluminium, which means that the most reactive metal is:

In a plant cell, turgor is caused by:

Three lights flash at intervals of 2, 6 and 14 seconds respectively. They are started together. How soon after will they next flash together again?

How many subsets does the set {a, b, c, d, e} have?

The number of double bonds in a molecule of carbon dioxide is:

Which of the following is a prime number?

The balances listed below appear in a trader's trial balance. The item that is to be included in the Profit and Loss Account is

The common name for silicon dioxide is:

The number of kilos in 1 metric tonne is: