The physical properties of aluminium are : i. It is a white light metal. ii. Its specific gravity is 2.7 iii. It melts at about 660 c and boils at about 1800 c. iv. It is a good conductor of heat and .....

The uses of gold are :

1. It is used for electroplating

2. It is used to prepare alloys.

3. It is used for making pieces of jewelers.

4. It is used as .....

The uses of silver are :

1. It is used for making coins, pieces of jewelers.

2. Silver bromide is used in photography.

3. It is used in the preparation of silver salts and medicine.

4. It is used for silvering .....

 Action with Halogens: (chlorine)

2Au + 3Cl2    →     2AuCl3    

Silver Ag reacts with following acids , to give the following : 3Ag + dil. 4HNO3  →   3AgNO3 + 2H20 +NO

Ag+ conc. 2HNO3   →   AgNO3 +H2O +NO2

2Ag + conc. H2SO4  .....

The word class that qualifies verbs or clauses is called an adverb.  Ram walks .....

Any kind of social and/or cultural practice that has negative effect on the individual, community and society may be called as bad customs. Such kind of practice will have a long-term negative effect on the community. Nepal is still an .....

Some of the alloys are : Brass: a mixture of copper with zinc Pewter: an alloy of tin, with other elements such as copper, lead, or antimony. Steel: the name given to an alloy of iron with carbon, usually with other elements, such as nickel and .....

The main ores are : Iron = Hematite, Magnetite

Hundi is a type of informal remittance transfer channel. Most South Asian migrant workers use this channel. Hundi is primarily an Informal Value Transfer System (IVTS) or Informal Transfer System (IFT). The bank and banking system dies not .....

aqua regia is a  mixture of concentrated hydrochloric acid and concentrated nitric acid in the ratio of 3:1.  .....

The period and group of : Gold Au:  Group : IB  Period : 6 Silver Ag  :  Group : IB  , Period : .....

A sluice gate  ( method)is traditionally a wood or metal barrier sliding in grooves that are set in the sides of the waterway. Sluice gates commonly control water levels and flow rates in rivers and canals. They are also used in wastewater .....

Hundis is considered illegal for the following reasons: the document is not legally recognised hence does not enjoy legal protection there is no physical movement of money so it avoids the tax system which hampers government revenue .....

Aquaregia is a mixture of concentrated hydrochloric acid and concentrated nitric acid in the ratio of 3:1.  .....

Substituting the value of y in Eq 1 to derive value of x

x =105 - y

x = 105 - 45

x = 60

The larger part is Rs.60

Therefore, the larger part is Rs.60 and smaller part is .....

The electronic configuration of aluminium is: 1s2, 2s2, 2p6, 3s2, .....

The cerebral cortex of the human brain is highly convoluted, meaning it has many folds and creases. These convolutions allow a large surface area of brain to fit inside our skulls. Because of this brain shape, our brains can have billions of neurons .....

Froth floatation method is used for concentration of sulphide ores. Concentration means removal of gangue particles from the ore.

In this process, a suspension of the powdered ore is made with water. In it, pine oil is added. The usage of .....

Metallurgy is the art and science of extracting metals from their ores and modifying the metals for use. .....

The quantity which can be measured directly or indirectly is called physical quantity.  Mass, length, time, temperature, velocity, density, etc. are the examples of physical quantities.   Mass can be measured using beam balance so .....

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Since, we can write, √96 = √2*2*2*2*2*3 √96 = 4√2*3 √96 = 4√6 Thus, 4 and √6 are the factors of √96, Since, 4 is a rational number while √6 is the irrational number, ⇒ We can make .....

Solution : t9 = 0 or, a + 8d = 0 or, a = - 8d t29 = a + 28d = -8d+28d = 20d t19 = a + 18d = -8d + 18d = 10d so, t29 = .....

Properties of water are : Water is a universal solvent. Water in a pure state has a neutral Water has a high specific capacity. Water molecules are the only substance on Earth that exist in all three physical states: solid , liquid and gas. .....

Those quantity which are independent of others are called fundamental quantity. Eg, length, mass, time, .....

Some of the differences between topical and sub-tropical zones are: Tropical zone lies up to 23.5o to both sides of equator while the subtropical zone lies between 23.5o to 66.5o from the equator. Tropical zone has a hot and humid .....

The relation between m2 with its multiples are:- 1 m2 = 10000 cm2 1 m2 = 100 dm2 100 m2 = 1 dam2 1 m2 = 1000000 mm2 1000000 m2  = 1 .....

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Two triangles are said to be congruent if all their three sides and three angles are equal. But it is necessary to find all six dimensions.  Conditions for Congruence of Triangles:

- SSS (Side side side ) -SAS Side angle side -ASA angle .....

Given, Primary Voltage (Vp) = 240V Primary current (Ip) = 30 A Secondary Volatge ( Vs) = 120 V Secondary current ( Vi) = ? Formula for transformer Vp IP = Vs Is Put the value in .....

Let the Primarly Voltage be 'Vp' , Secondary Voltage be 'Vs'. From given condition, Turns in Primary coil(Tp) = 2000 Voltage in primary coil (Vp) = 220 V Voltage in secondary coil (Vs) = 110 V  Turns in Secondary coil(Ts) = .....

Let the Primarly Voltage be 'Vp' , Secondary Voltage be 'Vs'. From given condition, Turns in Primary coil(Tp) = 1200  Turns in Secondary coil(Ts) =300 Voltage in secondary coil (Vs) = 55 V Voltage in primary coil (Vp) = .....

Here, given  radius of cricket ball (r) = 4 cm ball is a sphere We know that, Volume of sphere (V) =  4/3 .....

A is a subset of B when every member of A is a member of B. Example: B = {1,2,3,4,5} Then A = {1,2,3} is a subset of B Other subsets of B include {2,3} or {1,4,5} or {4} etc... But {1,2,6} is NOT a subset of B as it .....

The uses of transformer are : - It is used to increase or decrease the alternating voltages in electric power applications. - The transformer used in voltmeter, ammeters, protective relay etc. - It is used in voltage regulators, voltage .....

Let the CP of 1 orange be x. Given, Number of oranges = 80 Total CP = 80x Since, the shopkeeper lost selling price of 20 oranges, Loss amount = 20x Loss percent = ( Loss amount / CP ) ∗ 100 = ( 20x / 80x ) ∗ 100 =  ( 2 .....

A transformer is a device which is used to convert   low ac voltage  into the high a.c voltage or vice –versa.

Types

A step -up transformer is used to convert low a-c voltage to high ac voltage

A step .....

Clauses are units of grammar that contain at least one predicate (verb) and a subject. This makes a clause different than a phrase because a phrase does not contain a verb and a subject. In fact, the essential component of .....

You know a transformer consists of two electrically isolated coils. An A.C. is supplied to the primary coil.  It produces a varying magnetic field around the coil.  This varying magnetic field causes the induction of current .....

The DC generator working principle is based on Faraday’s laws of electromagnetic induction. An electromotive force gets induced within the conductor. If the conductor is present with a closed lane, the current which is induced will flow in .....

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