Question

13. Which of the following is incorrect according to Dalton's atomic theory?
(1) Matter is made up of atoms.
(2) Atoms of the same element are different in mass and properties.
(3) Atoms combine in a simple whole number ratio.
(4) Atoms take part in a chemical combination

Answer 1

Answer:

2)In the case of a concave mirror, show the path of the reflected ray when

the incident ray of light

A) is parallel to the principle axis of the mirror

B) Passes through the focus of the mirror

C) Passes through the center of currature of the mirror6) The speed of sound in air at 00 is 332 m/s if it increases at the rate 0.6m/s

Per degree what will be the temperature when the velocity has increased

344 m/s

Answer 2

Answer:

b) atoms of the same element are different in mass and properties