Acids, Bases and Salts — Science STD 10 — Question

State whether the following statement is true or false:
The planets twinkle at night due to atmospheric refraction of light.

State whether the following statement is true or false:
The axis of earth’s imaginary magnet and the geographical axis coincide with each other.

State whether the following statement is true or false:Diamond and graphite are the covalent compounds of carbon element (C).

One can identify the nature of a mirror from the nature of the image it forms. [True/ False]

State whether the following statement is true or false:
A student says that we can see an object because light from our eyes is reflected back by the object

All non-metallic oxides dissolve in water to form acids. [True/ False]

All the voluntary actions of our body are controlled for control of by pons. [True/ False]

State whether the following statements are true or false:
In biology, human beings are called producers.

A solution made in water is indicated by the symbol. [True/ False]