Control and Coordination — Science STD 10 — Question

How many milliamperes are there in 1 ampere?

What was the Mendeleev’s basis for the classification of elements?

Name the phenomenon responsible for the following effect:
When we sit in front of a plane mirror and write with our right hand, it appears in the mirror that we are writing with the left hand.

Which effect of current is utilised in an electric light bulb?

Explain why, alkanes are excellent fuels.

What colour will universal indicator show if you add it to the following substances?
sulphuric acid, pH = 2

Name the most important part of the human brain.

An element X which has 6 electrons in its outermost shell, require 2 electrons to complete its octet for attaining noble gas configuration. X is an essential element for the survival of all living beings. What is X?

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

One of the examples of two analogous organs can be wings of parrot and:

1. Filler of whale.
2. Foreleg of horse.
3. Front leg of frog.
4. Wings of housefly.