The quantum number n=2 and l=1 correspond to which orbital

• 1s

• 2s

• 2p

• 3d

Bond order of O₂^2- is

• 2.5

• 2

• 1.5

• 1

shape of BF₃

• Triagonal planar

• Tetrahedral

• linear

• pyramidal

A example for metallochromic indicator is

• methyl orange

• phenolphthalein

• Eriochrome Black T

• Diphenyl amine

An example for green house gas is

• N₂

• O₂

• CO₂

• N₂O

Volumetric analysis is a method of ....................analysis

• Qualitative

• Quantitative

What atom matches this electron configuration?
1s²2s²2p⁶3s²

• Neon
• Magnesium
• Aluminum
• Potassium

Water pollution is due to

• Agricultural discharges

• Sewage and other wastes

• Industrial effluents

• All the above.

The number of gram equivalents per litre

• Molarity

• Normality

• molality

• parts per million

What is the basis of hydrogen bond?

• Attraction forces between hydrogen atom bonded with another hydrogen atom

• Attraction forces between hydrogen atom bonded with a high electronegativity atom (F, O, N)

• Attraction forces between hydrogen atom bonded with a high electronegativity atom (F, O, N) with atom (F, O, N) of another molecule

• Attraction forces between hydrogen atom with another hydrogen atom of another molecule