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प्रश्न
Write the radical of the following valency:
Zinc
विकल्प
1+
2+
3+
1−
2−
3−
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उत्तर
2+
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संबंधित प्रश्न
Give two examples of the following:
Solid + Liquid mixture
Match the formulas of the following gases with their correct names :
Gases - (a) H2 (b) N2 (c) O2 (d) Cl2 (e) HCI (f) NH3 (g) CO (h) CO2 (i) SO2 (j) NO (k) NO2.
Names:
(1) Ammonia (2) Nitrogen Dioxide (3) Oxygen (4) Hydrogen (5) Nitrogen (6) Chlorine (7) Carbon Monoxide (8) Sulphur Dioxide (9) Nitrogen Monoxide (10) Carbon Dioxide (11) Hydrogen Chloride
Give the symbol of the following element:
Boron
State the type of element for the following:
Oxygen
State the type of element for the following:
Sodium
State the type of element for the following:
Phosphorus
State what is meant by the term ‘activity series of metals’.
Write the radical of the following valency:
Carbonate
State the valency of the following metallic element and write symbol with the valency
Sodium
Certain metal exhibit variable valencies which include valencies: 1+, 2+, 3+, and 4+.
State the variable valency of the following metal.
Lead
write symbol with the variable valency
