9class Elements and valencies

This element is octatomic?

• Nitrogen
• Oxygen
• Carbon
• Sulphur

The valency of sulphate ion is

• 2-
• 2+
• 3-
• 3+

In NH4Cl, the cation is

• Cl
• NH₄⁺
• NH₄Cl
• none

Which element has more number of atoms in molecule

• Sulphur
• calcium
• Nitrogen
• Carbon

The formula of Aluminium ion is

• Al⁺³
• Al⁺¹
• Al⁺²
• Al°

The Formula of Ammonium ion is

• NH₄⁺³
• NH₄⁺¹
• NH₄NH₄
• NH₄°

The formula of Bromide ion is

• Br¹⁻
• Br⁺¹
• Br⁺²
• Br⁻²

The formula of Chloride ion is

• Cl¹⁻
• Ch¹⁻
• Cr
• Cl²⁻

The formula of dichromate ion is

• DCr
• DCrO3
• Cr2O7⁻²
• No answer

The formula of hydride ion is

• Hy
• H¹⁻
• Hd
• H