10 G of [NH4NO3] dissolve it in water at 25 C• and the mixture is stirred after 1 minute the temperature of the solution 10C° so which word the describe this change

The weight % of [AL] in earths crust

which of the following the iron ore's when roasted the percentage of iron increases and doesn't oxides ?

on heating fe2o3 with co till 380 C° then adding the Conc hot H2SO4......is (are)formed?

if iron react with sulfur then dilute HCL added the gas can be tested bY?

if energy absorb it during bond breaking is 260 KJ and the energy released the during Bond formation is 150 KJ so he the change by delta H is........

element in 1st transitions series used as a catalyst in manufacture of ammonia...... and what is the name of the method

if you have four elements (A)(B)(C)(D) and the element (A) has no coloed compound , the element (B) has an oxide used in manufacture of dyes , element (C) use the in manufacture of MIG fighter jets ,and the element (D) has maximum oxidation number in its ion, so these elements are ......respectively

Lowest melting point in 1st transition series?

it is possible to distinguish between a piese iron and a piece of scandium by?

.......element react with chlorine forming this halide XCL2,XCL

All the element of first T.E HAVE Oxidation state (+2) except.......

Heating Fe with conc H2SO4.............is formed

Iron react with Halogen forming.........