Test valencies & symbols

Valency of oxide is

• 1⁺

• 2⁺

• 1^--

• 2^--

Correct symbol & valency of carbonate is

• CO_3, 2^--

• Co3, 2⁺

• co3, 1⁺

• cO_{3, 2}^--

HCO₃^--1 correctly represents:

• Hydrogen carbon tri oxide

• Hydrogen carbonate

• Hydrocarbon

• Hydrogen carbon oxygen

Symbol of zinc is _____________, & valency is _________.

• zn, 2⁺

• ZN, 2⁺

• Zn, 2⁺

• zN, 2^--

Copper has valencies:

• 1⁺, 2⁺

• 1⁺, 3⁺

• 1^--, 2^--

• 2⁺, 3⁺

Hydrargyrum is the latin name of the element:

• Hydrogen

• Helium

• Haemoglobin

• Mercury

Common name of Stannum is:

• Silicon

• Sulphate

• Tin

• Silver

Ag is the symbol of:

• Antimony

• Argentum

• Arsenic

• Aluminium

Ammonium is a radical having symbol __________ & valency __________.

• Am, 1⁺

• AM, 1^--

• NH_{3, 1}⁺

• NH_{4, 1}⁺

Symbol of calcium is ____________ & it is _____________ in nature.

• Co, electropositive

• Ca, electonegative

• Ca, electropositive

• CA, electropositive