CBSE Class 10 Science Questionbank

Electrolysis of water is an example of a:

A solution turns red litmus blue. Its pH is likely to be:

Which of the following is an amphoteric oxide?

The alkane that comes immediately after ethane in the homologous series is:

A current of 2 A flows through a resistor connected across a 12 V battery. Find its resistance (in $\Omega$).

The mirror used as a rear-view mirror in vehicles is:

Salivary amylase secreted in the mouth digests:

Assertion: The sky appears blue during the day.

Reason: Scattering of sunlight by air molecules is stronger for shorter wavelengths such as blue.

A heterozygous tall pea plant (Tt) is crossed with a dwarf plant (tt). The percentage of tall offspring expected is:

Resistors of $6\ \Omega$ and $3\ \Omega$ are connected in parallel. The equivalent resistance is:

An object placed 20 cm from a concave mirror of focal length 10 cm forms a real image at what distance (in cm)?

Inside a bar magnet, the magnetic field lines run from:

The hormone that regulates blood glucose level is secreted by the:

According to the ten per cent law, if plants capture 1000 J of energy, the energy available to a second-level carnivore (third trophic level) is about:

A current of 0.5 A flows for 10 minutes. Find the charge (in C) that passes through the circuit.

In a flower, pollen grains are produced by the: