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Explanation:
22) Apparatus= thistle funnel,stand, cork,co2gas,dilute hydrochloric acid,test tube, sodium carbonate,calcium hydroxide solution, delivery tube
Chemicals= Sodium carbonate , hydrochloric acid, sodium chloride, carbon dioxide, and water
23) the image formed is virtual ,erect and enlarged. .
25)The ciliary muscle to which eye lens is attached and helps to change its focal length by changing radii of curvature of eye lens. 2. When the eye is focussed on a distant object, the ciliary muscles are relaxed so that the focal length of eye lens has its maximum value which is equal its distance from the retinaThe eye's crystalline lens sits just behind the pupil and acts like autofocus camera lens, focusing on close and approaching objects. Focused by the cornea and the crystalline lens, the light makes its way to the retina.
26) Dobereiner's law of triads: When elements are arranged in order of increasing atomic masses, groups of three elements (triads), having similar chemical properties are obtained. The atomic mass of the middle elements of the triad being equal to the arithmetic mean of the atomic masses of the other two elements
B) The Mendeleev's periodic law states that " The properties are a periodic function of their atomic mass." by using the atomic mass as the concept periodic classification of elements can be arranged in a groups.
Charita 29 nundi rasavaaa
Explanation:
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