[ Question Bank ] - 2022 — Science STD 10 — Question

What name is given to the sequence of gradual changes over millions of years in which new species are produced?

State two uses of a concave lens.

What is the atomic number of carbon. Write its electronic configuration.

There is an oil layer on the water surface of river in your area. What will you do?

What is the IUPAC name of acetic acid?

Two exactly similar heating resistances are connected (i) in series, and (ii) in parallel, in two different circuits, one by one. If the same current is passed through both the combinations, is more heat obtained per minute when they are connected in series or when they are connected in parallel? Give reason for your answer.

What is done so to prevent rusting or iron windows and iron doors of your house?

What are the short fibres of a neuron known as?

The amount of water vapour in air is determined in terms of its………..