Class 10 Science Full Test 1

A few days after whitewashing, walls get a shiny finish. This is due to the formation of

Which of the following salts does not contain water of crystallisation?

Which of the following oxide(s) of iron would be obtained on prolonged reaction of iron with steam?

Consider the structures ‘X’ and ‘Y’ given below: Which of the following statements are correct?
(i) ‘X’ and ‘Y’ are homologues.
(ii) ‘X’ and ‘Y’ have the same structural formula, but different molecular formula.
(iii) ‘X’ and ‘Y’ have the same molecular formula, but different structural formula.
(iv) ‘X’ and ‘Y’ are structural isomers.

The process in which loss of water in the form of vapours from the aerial parts of plants takes place is X, which helps in Y. X and Y are:

Single circulation i.e., blood flows through the heart only once during one cycle of passage through the body, is exhibited by

The release of growth hormone from the pituitary is stimulated by a releasing factor from the

The thread-like structures of bread mould that bear blobs on top are

The number of different phenotypes seen in the F2 generation of a dihybrid cross is

A 10 mm long awl pin is placed vertically in front of a concave mirror. A 5 mm long image of the awl pin is formed at 30 cm in front of the mirror. The focal length of this mirror is

Which of the following lenses would you prefer to use while reading small letters found in a dictionary?

A student sitting on the last bench can read the letters written on the blackboard but is not able to read the letters written in his text book. Which of the following statements is correct?

If the area of cross-section of a wire is halved (length and material remaining the same), its resistance

What is the minimum resistance which can be made using five resistors each of 1/5 Ω?

Choose the correct option. The magnetic field inside a long straight solenoid-carrying current

Which of the following constitute a food-chain?

Assertion (A): Evaporation of water is a chemical change.
Reason (R): Water vapour can be condensed back into water.

Assertion (A): Universal indicator only tells us whether a solution is acidic or basic.
Reason (R): Universal indicator is a mixture of several indicators.

Assertion (A): Gold and platinum are found in the free state in nature.
Reason (R): They are very unreactive metals.

Assertion (A): Animal fats are considered harmful for health.
Reason (R): Animal fats generally contain saturated fatty acids.