blue glass chess set

Find the probability of selecting a blue pencil from the set of pencils. => 2 out of 7 or 3 out of 7 or 4 out of 7 or 5 out of 7..

The numbers of red, green, blue, black, and white colored pencils in a box are 10, 15, 20, 25, and 30. Find the median of the data set. => 20 or 25 or 50 or 10..

A mirror whose polished, reflecting surface is a part of a hollow sphere of glass or plastic is called a spherical mirror. In a spherical mirror, one of the two curved surfaces is coated with a thin layer of silver followed by a coating of red lead oxide paint. Thus, one side of the sphe..

Scrape the inside of your cheek using an ice-cream spoon. Spread the tissue in a drop of water on a glass slide. Add a drop of methylene blue and place a cover slip. Observe the cells (epithelial) under the microscope. Epithelial cel..

Scrape the inside of your cheek using an ice-cream spoon. Spread the tissue in a drop of water on a glass slide...

Tests for Ammonia - Following are the tests for ammonia: 1. Ammonia gas has a characteristic pungent, irritating odour. 2. It changes the colour of: a) Moist red litmus paper blue. b) Turmeric paper brown. c) Methyl orange yellow. d) Colourless phenolphthalein deep pink. 3. A glass..

Question: A zinc rod was kept in a glass container having CuSO 4 solution. On examining, it was found that the blue colour of the solution had faded. After few days when the zinc rod was taken out of the solution, a number of small holes were noticed in it. State the reason..

Presence of Water Vapour in Air - Ordinary air seems to be dry. It does not cause wetness on our body or clothes. However, you may have some idea about the huge quantity of rain, snow, dew, etc. that gets formed in a year throughout the world. All of it comes only from the air. Thus, the apparent d..

. On suddenly inverting the glass tube, he observed that guinea fell down faster than the feather. He repeated the experiment by removing air with the help of an air pump which was connected to the brass tube. He found that both the guinea and the feather fell down at the same time, when ..

. These bands are called interference fringes. The solid arcs represent the crests and the dotted arcs represent the troughs in the above diagram. When these arcs overlap, the (.) dots represent the maximum intensity i.e., constructive interference, whereas the (x) crosses represent the minimum int..