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No  fuels can't be OBTAIN in LABORATORY or something as it REQUIRES lot of heaat , temperature and PRESSURE since they are obtained from ancient plants so it requires time..........lot of time

Benzyl chloride is an ALIPHATIC chloride, UNLIKE p-chlorotoluene which is an aromatic chloride. So benzyl chloride will give AgNO3 TEST (FORM white ppt.) while p-chlorotoluene will not give AgNO3 test.

Phenol turns blue LITMUS RED DUE to its slightly BASIC nature. Ethanol fails to do so.
Phenol reacts with NaOH, but ethanol does not do so.

Beacause hypoiodite SOLUTION is act as base u can use iodine but you have to ADD base while using iodine. 
you can SEE ATTACHMENT reaction between ketone and iodine. it is haloform reaction.

Highest oxidation state is +9 and of Ir (IRIDIUM). atomic NUMBER 77

Nickel (MOND's process) and Zirconium and TITANIUM (Van Arkel method) are purified by vapour PHASE REFINING.

Polyester is a polymer which contains the ester functional group. whereas polyacrylate is a polymer of acrylate.
Polyester is a synthetic fibre, derived from coal, air, water and petroleum.
Terylene is a popular form of polyester., PET, or poly-ethylene terephthalate, is another form of polyester, which is used to make bottles, films and wires.
Polyester is also used for making hoses, ropes, nets, thread, raincoats, fleece JACKETS, clothing and medical textiles. 
Fabric made from acrylic is WARM to wear, retains its shape and is durable.
Acrylic is easy to WASH and dries quickly.
Acrylic is used in apparel like sweaters and socks, and in home furnishings such as furniture, carpets, blankets and upholstery fabrics.  
Industrial uses of acrylic INCLUDE craft YARNS, awnings, boat and vehicle covers, and luggage.

P-dichlorobenzene SHOWS intermolecular hydrogen BONDING DUE to which its molecules are strongly attracted to each other. Thus its boiling point increases. It has lower SOLUBILITY because to be soluble it has to break its hydrogen bonds and form NEW hydrogen bonds with water which is not feasible.

Iodoform test
Iodoform test is SHOWN only by COMPOUNDS which have three ALPHA hydrogens on the same hydrogen atom.
Acetaldehyde GIVES this test and not 2-phenyl-ethanal.
Reaction-
CH3CHO + NaOH + I2 --> CHI3 + HCOONa

Chloroform reacts with the OXYGEN in air to GIVE a poisonous GAS phosgene.
2CHCl3 + O2 --> 2COCl2 + 2HCl

Ideally, you should STUDY all the examples, intext questions and exercise questions (about 100), but if you are short of time, you should atleast study PROPERTIES of hydrides of Group 15, difference between white ans red phosphorus, reaction of white phosphorus and Naoh, Reaction of PCl3 and PCl5 with water, Oxoacids of phosphorus and sulphur, Bleaching action of SO2 and Cl2, Anomalous properties of FLUORINE, PREPARATION and few other REACTIONS of Xenon compounds.

Conductivity
The conducting POWER of all IONS FURNISHED by electrolyte PRESENT in a unit VOLUME of the solution.
Molar conductivity -
The conducting power of all ions furnished by 1 mole of an electrolyte.

The smell does not reach at the same time because smell is transferred by DIFFUSION of GASES which is fast but not INSTANTANEOUS.

Even though SPONGE is a solid, there exist holes in the sponge in which AIR is PRESENT. When sponge is compressed, this air is expelled. The PARTICLES of sponge are compressed to a very small extent.

The powdered salt particles take the SHAPE of the jar.
We cannot say that salt is a liquid BASED on this CHANGE as the individual particles of salt are not compressed or expanded by PUTTING it into the jar.

Rate at which GASES travel are inversely proportional to their molecular mass,
More the molecular mass, less will be its rate of diffusion.



molar mass of HCL = 36.5g
mole mass of NH₃ = 17g

Since NH₃ has lower molecular mass, it will travel FASTER. The distance travelled by it will ALSO be higher than that of HCl.

All together for a fire to consume, each of the three components of the fire triangle must be available: heat, fuel, and oxygen. 
Heat is a type of energy that can be exchanged starting with one protest then onto the next or even made to the expense of the loss of different types of vitality. 
A fuel is any material that can be made to respond to different substances so it discharges compound or atomic energy as heat or to be utilized for work. 
Oxygen is a dry, unscented gas. It is a substantial component and you can discover it on the periodic table with the nuclear NUMBER 8. 
On the off chance that anybody has removed the fire will be put out. As the fire blanket totally surrounds the individual whose clothes caught fire, it seals the individual's body surface around the fire and remove's the oxygen SUPPLY to the fire, along these lines putting it out. Henceforth fire blanket goes about as a fire extinguisher and PREVENTS the fire from spreading.

Carbon dioxide EXISTS as a SOLID below -78 degrees CELSIUS, as a liquid below -57 degrees celsius, as a gas above -57 degrees celsius.
Dioxygen (O2) exists as a solid below -219 degrees celsius, as a liquid below -183 degrees celsius, as a gas above -183 degrees celsius.
Iron exists as a solid below 1538 degrees celsius, as a liquid below, as a gas above 2862 degrees celsius.

The principle of froth FLOATATION is the preferential wetting (dissolving) of ore and gangue particles by water and pine OIL. The ore is preferentially WETTED by pine oil and the gangue is wetted by water. They can then be SEPARATED as the ore with the pine oil rises to the SURFACE.

The gas having the SMALLEST MOLAR MASS will travel the fastest. (Graham's LAW)

DDT-Dichlorodipheyltrichloroethane

2MnO4+5 C2O4+16 H
x=2
y=5
z=16
2Mn2+10CO2+8H2O

Do you want to know the electronic configuration of potassium ?
If YES, do you want to know the SIMPLER ONE or the more COMPLEX one ?
The simpler one is  2, 8, 8, 1
The complex one is  1s^2 2s^2 2p^6 3s^2 3p^6 4s^1

In water, the central atom, oxygen has two bond pairs and two lone pairs. Thus, it should have a bent shape (please comment if you have any doubts REGARDING this). The bond ANGLE should be 109.5 degrees, but the bond angle decreases DUE to REPULSION between lone pairs and bond pair-lone pair repulsion.

Note - To understand this answer, you should be clear in the basics of VSEPR theory. If you have any doubts, ask in the comments.

A toothpaste contains some fluoride, some calcium CARBONATE, some water and some flavour related CHEMICALS.  Some hydroxide of aluminum of other other METALS is present. Some TIMES small amounts of detergents are ADDED.  These are  basic in nature.

It is the METHOD of NAMING particular ORGANISM by a standard name known all over the WORLD

Hydrogen and OXYGEN combine in the ratio of 1:8 means that 1.0g of hydrogen GAS requires 8g of oxygen gas.to FORM WATER.
   therefore,8/1×3g of oxygen=24 g of oxygen

The CHANGE which is PERMANENT is CHEMICAL change.The change which is TEMPORARY is PHYSICAL change.

From the formula of the compound it may not be possible to KNOW that the bond present in a compound is ionic or covalent.

H2 O,   Cl2  ,   Na Cl ,   K F,  K Cl ,  B F3,   H Cl ,  Na OH, O2,  O3,  Fe O2, Si O2,  CO2,  

From the nature of the elements (or functional groups or radicals) inside the compound, we may be ABLE identify the nature of the bonds.
 
Where METALS are present, usually they are ionic bonds.  Where there are Cl, F or OH elements present they are likely to be ionic bonds.  We come to know from this nature only after STUDYING a lot of the compounds and properties of elements and their relative electronegativity.

No. Hydrogen does not have the lowest ignition temperature.  There are natural GAS and many other fuels and materials which ignite at much LESS temperatures.
like KEROSENE, PETROL for example.
  Hydrogen ignites at 400 or 500 deg C.

The fuel weight, calorific value, oxygen required, ignition temperature, cost, availability, danger safety measures etc. are decision parameters for hydrogen to be chosen for ignition.

It BURNS with no residue.
It is a CLEAN FUEL.

It increases the strength of the BOND between the METAL and the CO GROUP.

Atomic no. of potassium (K) is 19.
Its electronic configuration is - 2,8,8,1
VALENCE electrons is the total number of electrons in the last SHELL of the atom.
Thus, potassium has 1 electron in its valence shell.
Also, it lies in the 1st group of the periodic table.all ELEMENTS in the 1st GRP have same no. of valence electrons which is 1.

hope tis helps u...

The ATOMIC no.of k=19
so E.C.,
k=2,l=8,m=8,n=1

Dear Student,

Potassium Symbol---K
Atomic number ---19
Electronic configuration:
1s² 2s²2p⁶3s²3p⁶4s¹
so, to attain Nearest inert gas STABILITY , potassium will loose 1 electron.
so VALENCY of Potassium is 1