An electric heater is rated 1500 W. How much energy does it use in 10 hours?
Answer: Energy consumed by an electric heater can be obtained with the help of the expression P= W/T. Where, Power... View Article
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Which of the following shells can have maximum of 2 electrons? (a) K (b) L (c) M (d) N
Each shell can accommodate a maximum of 2n2 electrons. K shell with the value of n=1 can have a maximum... View Article
Explain the position of electrons based on the modern revised model of an atom.
According to the modern revised model of an atom, electrons are confined to clearly defined orbits. Electrons occupy only certain orbits... View Article
What is the major source of freshwater in the city/town/village where you live?
The major sources of freshwater in cities, towns and villages are given below: Rivers Lakes Ponds Ground water In peninsular... View Article
Which reagent will convert RCOR’ group into RR’C(C6H5)OH?
Phenyl magnesium bromide converts RCOR’ group into RR’C(C6H5)OH. All three types of alcohol (primary, secondary and tertiary) can be prepared... View Article
What will be the behaviour of the compound having molecular formula NH2CH2COOH?
It can exist in solution as zwitterions +NH3CH2COO–. In an acidic medium, the ion is added to and it becomes NH3+CH2COOH.... View Article
What is meant by saying that the potential difference between two points is 1 V?
If 1 J of work is required to move a charge of amount 1 C from one point to another,... View Article
What is the correct general outer electronic configuration of group 13 elements?
The correct general electronic configuration of group 13 elements is ns2 np1 since they have 3 electrons in the valence... View Article
Name the factors on which the speed of the transverse waves on a string depends.
Linear mass density and tension are the two factors on which the speed of the transverse waves on a string... View Article
Which of the following is not an element of group 13? i) Pb ii) B iii) Al iv) In
(i) Pb The outermost electronic configuration of Pb is ns2np2, hence it belongs to group 14 and not group 13.... View Article
Explain the statement using one word: A cow is dependent on plants for its food.
A cow is dependent on plants for its food. The single word for this sentence is a cow is a heterotroph. ... View Article
Name the product which is obtained on oxidation of sodium borohydride by iodine.
The oxidation of sodium borohydride with iodine in diglyme gives diborane. Reaction The action of a metal hydride with boron... View Article
Which of the following is an example of a producer?a)Sun b)Fern c)Chestnut d)Ant
(b) Fern is a producer Fern is an avascular, seedless plant that belongs to the group Pteridophyta. There are about... View Article
Explain how soil gets affected by the continuous plantation of crops in a field.
What are crops? Crops are plants grown by the farmers. Agriculture plays a very important role in the Indian economy.... View Article
How much energy is given to each coulomb of charge passing through a 6 V battery?
Given that Charge,q = 1 C Potential difference V = 6 v To find out We need to find the... View Article
Why is a normal eye not able to see clearly the objects placed closer than 25 cm?
A normal eye is unable to clearly see the objects placed closer than 25 cm because the ciliary muscles of... View Article
From where does the transfer of electrons takes place in electrovalent compounds?
The electrovalent compound is formed by the transfer of electrons from a metal to a non-metal. The bond formed between them... View Article
Which solution gives a white precipitate with excess ammonium hydroxide solution. (1) Zinc Chloride (2) Ferrous chloride (3) Ferric chloride (4) Copper chloride
(1) Zinc chloride Zinc chloride (ZnCl2) is soluble in excess of ammonium hydroxide. ZnCl2 + 2NH4OH → Zn(OH)2 ↓ + 2NH4Cl Colourless White... View Article
What is the electrolytic process of extaction of aluminium from bauxite known as?
The process of extraction of aluminium is known as the Hall-Heroult process. Hall-Heroult Process The Hall-Heroult process is widely used in the... View Article
What is the term used for the plants that have naked embryos and vascular tissue?
the term used for the plants that have naked embryos and vascular tissue is Pteridophytes. These have naked embryos and... View Article
