The number 2549 written to 2 significant figures is

Reactive metals such as potassium react with water to give hydrogen and:

The following statements describe an ordinary mercury-in-glass laboratory thermometer. Which one of them is NOT true?

Three lights flash at intervals of 4, 6 and 10 seconds respectively. They are started together. How soon after will they next flash together again?

All of these are compounds EXCEPT for:

A relationship between two organisms where one organism derives benefits from the relationship and the other organism derives no benefit, but is not harmed, is called:

Which of the following is NOT a prime number?

The units of specific latent heat are:

2(5 - x) - 3(x - 6) =

A species of mouse has 32 chromosomes in its muscle cells.What will be the numbers of chromosomes in the mouse′s skin cells and sperm cells?

Which of the following device interfaces integrates the device controller into the disk or CD drive?

Instruction: Choose from the four options the word or pair of words which BEST completes the meaning of the sentence.

To conceal his true activities, the spy quickly ............ a plausible excuse for his presence there.

A salt that is anhydrous contains no:

Genetic engineering involves:

All of the following items are widely used input devices EXCEPT the __________.

The shaded area in the Venn diagram above represents

POPULATION PYRAMID FOR COUNTRY X

Which of the following features of Country X may be gathered from the diagram above?

Food can be preserved in all of these ways EXCEPT for:

The Periodic Table is arranged in order of:

The simplest ratio of atoms in a compound is given by the: