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Start learning 50% faster. Sign in nowConcave lens possesses at least one surface that curves inwards. It is a diverging lens, spreading out those light rays that have been refracted through it. A concave lens is thinner at its centre than at its edges, and is used to correct short-sightedness (myopia). After light rays have passed through the lens, they appear to come from a point called the principal focus. The image formed by a concave lens is virtual, upright, and smaller than the object, and it cannot be projected onto a screen.
Identify the acid commonly used for glass etching.
What two acids are mixed to prepare Aqua Regia, used by goldsmiths?
Hydrogen exhibits properties similar to which groups in the periodic table?
Which of the following is the richest source of phosphorus?
The Nuclear Fusion on the Sun’s surface result into formation of Atoms.
When pressure is increased the melting point of ice –
A substance X turns the colour of red litmus blue, and it will change methyl orange-
Which element is used in pencil leads?
Lewis Acid is a species (charged or uncharged) which can accept a pair of
Identify the pairing that is not correctly matched.
(I) Dry ice - Solid form of carbon dioxide
(II) Fullerene - An allotrope of hydr...
