Chemistry Test - 70

Rutherford and Soddypresent the theory of radioactive disintegration.

Neutrino hascharge 0, mas 0.

2-hydroxy propanecan be oxidised to the corresponding carbonyl compound.

A particle which is four times in mass and two times in charge that of proton isan alpha particle.

Flourine is the most electro negative element due to its small atomic radius .It also has the tendency to accept an electron to complete octet configuration.

Lithium is the lightest of all the metals due to its low atomic number among meetals.

FCH2COOH is the strongest acid out of all.

Since the electron withdrawing inductive effect (-I effect) of the halogens decreases in the order of F>Cl> Br> I , therefore the acidic strength of the α- halo acids decreases in the same order.

FCH2COOH > ClCH2COOH > BrCH2COOH > ICH2COOH.

We will rewrite the formula as an equation.

2K + 2Cr + 7O = 0

The zero comes from there being no overall charge on the compound.

Each oxidation number is represented by the element's symbol.

Since this compound is not a peroxide or superoxide, the oxidation value for O is -2

K being in group 1 has a +1 charge and therefore has an oxidation number of K is +1

Now, by putting known values in we have:

2(+1) + 2(Cr) + 7(-2) = 0

2 + 2Cr -14 = 0

2Cr = +12

Cr = +6.

All of the following are constituents of RNA molecule except Thymine.

Given compound is Lithium Sulphate - Li2SO4

Elemental calculation ::

Li - Lithium - 6.941 - 2 - 13.88200 %

S - Sulfur - 32.065 - 1 - 32.065 %

O - Oxygen - 15.9994 - 4 - 63.9976 %

Now, total = 12.6264 + 29.1647 + 58.2090 = 109.9446