MO, What will be the formula of the metal chloride ? 28. The mass
number, atomic number and the number of neutron an element are x, y
Cataland z respectively, Express their inter-relation by an equation. (i) N,
| T H , NH, (ii) Fe + HO, FeO + H (iii) Z3 + NaOH + Na ZnO +
H. (iv) Mg + CO. - MgO + C (v) CaCO + HCI CaCl, + CO,
HO (vi) P+1, PI
C. Objective Type Questions :
[1 mark each]
29. Choose the correct answer : (i) aP + bo, =cP0. In this
reaction a, b, c are 3, 4, 5/2, 4,574, 5,2 / 5,4, 2 respectively.
() The inventor of modern symbol for element is Dalton / Bergellius/
Eve ne Priestley / Lavoisier. Giii) The atomic theory is given by Avogadro /
hari Newton / Dalton/ Lavoisier. (iv) In Mgo the valency of Mg is 1/2/3/4.
Eo you (v) The formula of calcium phosphate is CaPO/Ca,(PO)/Ca,(PO),
Po (vi) The symbol of sodium is S/Na/Pb. (vii) The neutral particle is
dium electron / proton / neutron. (viii) Chlorate radical is denoted by
CI/CIO / CIO, (ix) The symbol of Calcium is C/ Ca/ Cu / CO.
ca 30. Fill in the blanks : (i) The valency of nhonhorne in R
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