Wich of the following statement is True about static and current electricity?
I. In static electricity, the electrons cannot flow in earth materials or neutral materials
II. Electrical charge built up on the surface of an object in static electricity
III. Electric current can be direct or alternating
IV. Electric current is the flow of electrons in an complete circuit of conductors
A. I and III only
B. II and IV only
C. I and IV only
D. I, II, III, IV
Answers
Answer:
Perfect answr solved .by me.
So nice questions.
Question:
Which one of the following household substances found in the house will form a precipitate with an aqueous solution of barium chloride: baking soda, household ammonia, table salt, epsom salt, bleach.
Chemistry in Everyday Life:
Almost everything around us is a chemical substance and is made up of elements and compounds. A lot of household substances found in the house, such as baking soda, household ammonia, table salt, Epsom salt, bleach are chemical substances.
Answer and Explanation:
Baking soda, household ammonia, Epsom salt, and bleach will form a precipitate with an aqueous solution of barium chloride.
The chemical formula of baking soda is NaHCO
3
that reacts with barium chloride to form barium carbonate precipitate(as one of the products) as it is insoluble in water.
The chemical formula of the household ammonia is NH
3
that reacts with barium chloride to form nitrogen trichloride precipitate(as one of the products) as it is insoluble in water.
The chemical formula of Epsom salt is MgSO
4
that reacts with barium chloride to form barium sulfate precipitate(as one of the products) as it is insoluble in water.
The chemical formula of bleach is CaOCl that reacts with barium chloride to form barium chlorate precipitate(as one of the products) as it is insoluble in water.
Answer:
Static electricity is an imbalance of electric charges within or on the surface of a material. The charge remains until it is able to move away by means of an electric current or electrical discharge. Static electricity is named in contrast with current electricity, which flows through wires or other conductors and transmits energy.[1]
Contact with the slide has left this child's hair positively charged so that the individual hairs repel one another. The hair can also be attracted to the negatively charged slide surface.
A static electric charge can be created whenever two surfaces contact and have worn and separated, and at least one of the surfaces has a high resistance to electric current (and is therefore an electrical insulator). The effects of static electricity are familiar to most people because people can feel, hear, and even see the spark as the excess charge is neutralized when brought close to a large electrical conductor (for example, a path to ground), or a region with an excess charge of the opposite polarity (positive or negative). The familiar phenomenon of a static shock – more specifically, an electrostatic discharge – is caused by the neutralization of charge.