Engineering Chemistry-I (MCQ)

The number of proton in Na⁺

• 8

• 9

• 10

• 11

H₂ molecule is

• Covalent

• Ionic

• Co-Ordinate

• None of these

Which of the following are not isoelectronic

• Mg⁺⁺ and Ca⁺⁺

• K⁺ and Ca⁺⁺

• S^2- and Ar

• Na⁺ and Mg⁺⁺

Outermost electronic configuration of element having atomic number 17 is represented by

• 3s¹

• 3s²3p⁵

• 3s²3p⁶

• 2s²2p³

Isotopes differ in

• atomic number

• position in periodic table

• number of protons

• number of neutrons

₆C¹⁴ and ₇N¹⁴ may be classified as

• Isotopes

• Isobars                

• Isotones

• Isoelectronics

Atomic number and mass number of oxygen is

• 7,16

• 8,16

• 6,12

• 7,14

Isotones having same numbers of

• Electrons

• Protons

• Neutrons

• Masses

Neutrons are present in all atoms except

• H

• He

• C

• None of these

The most electronegative atom is

• Oxygen

• Chlorine

• Iodine

• Fluorine