There are three products that are produced in the Chlor-alkali process. These are Sodium Hydroxide (NaOH), chlorine gas (Cl2), and hydrogen... View Article
When 1g of copper powder is taken in a china dish and heated, a black-coloured substance is formed. This substance is copper oxide. 2Cu +O2 →2CuO... View Article
(a) Both A and R are true and R is correct explanation of the Assertion. Nuclear Energy 1. It is a non-conventional source of energy. 2. It is... View Article
(b) Both A and R are true but R is not the correct explanation of the Assertion. When alcohol is added to a carboxylic acid with sodium... View Article
(b) (A) and (D) Coal and petroleum fuels contain carbon molecules on incomplete combustion, they react with atmospheric oxygen and forms a... View Article
(d) Afforestation Afforestation is the planting of trees in an ecologically degraded or previously barren environment. Abandoned mines or... View Article
d) 1A Given P1=100W,P2=40W in series, i=1A In series , same current will flow in both bulb. A circuit is said to be connected in series when the... View Article
d) increases heavily When the plastic insulation of live and neutral wires gets torn somehow and touches each other, then due to this direct... View Article
(d) virtual and erect A concave mirror is a mirror that is curved inward in the middle. It is also known as converging mirrors, due to the fact... View Article
(d) all reflecting surfaces The laws of reflection hold true for all the reflecting surfaces, i.e. all mirrors (either plane or spherical)... View Article
b) CaSO4.2H2O The compound plaster of Paris is made by heating gypsum at 120 degree Celsius. The chemical formula for the plaster of paris... View Article
(c) Sodium hydrogen carbonate and tartaric acid Baking soda is a mixture of sodium hydrogen carbonate and tartaric acid. It is used to increase... View Article
(d) (B), (C) and (D) In a double displacement reaction such as the reaction between sodium sulphate solution and barium chloride solution,... View Article
(d) Double displacement reaction When hydrogen sulphide gas is passed through a blue solution of copper sulphate, a black precipitate of copper... View Article
A and B CaO(s)+H2O(l)→Ca(OH)2(aq) A combination reaction is a reaction where two or more elements or compounds combine to form a single... View Article
The maximum concentration of pesticides is found in human beings because humans comprise the topmost level into the food chain, and in the... View Article
The common signs of sexual maturation in boys and girls are: (i) Growth of excessive hairs on body parts such as pubic area, armpits, and face.... View Article
The change in magnetic field lines in a coil is the cause of induced electric current in it, and this phenomenon is known as Electromagnetic... View Article
An example of a cyclic unsaturated compound is Cyclobutene. Ringed structures called cyclic hydrocarbons may be formed by hydrocarbons. Since... View Article
(i) Here the focal length f is 5 cm then 2f will be 10 cm (2×10), and object is placed 10 cm from the lens, means the object is at 2F′.Thus, when... View Article