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Quiz 196
Mdcat-past-papers Quiz
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3901. Arrange the following elements according to the trend of ionization energy (C, N, Ne, B).
Ne < N < C < B
B < N < C < Ne
B < C < N < Ne
Ne < B < C < N
3902. Which one of the following will have the smallest radius?
Al³⁺
Mg²⁺
Si⁴⁺
Na⁺
3903. Keeping in view the size of atoms, which order is correct?
N > C
P > Si
Ar > Cl
Li > Be
3904. The ionic radius of fluoride ion is:
72 pm
95 pm
136 pm
157 pm
3905. Ionization energy decreases down the group from top to bottom due to:
Increase in proton number
Increase in shielding effect for intervening electrons
Decrease in atomic size
Increase in atomic mass
3906. Modern periodic table is arranged in ascending order of:
Atomic mass
Proton number
Mass number
Nucleon number
3907. In the second period of elements, although oxygen lies next to nitrogen yet its first ionization energy is lower than that of nitrogen because:
Oxygen is paramagnetic in character
In oxygen, there exists repulsion between pair of electrons in same orbital
Nuclear charge of oxygen is greater
Oxygen has higher electron affinity
3908. Which of the following elements has the smallest size?
Na
K
Al
Li
3909. Which of the following has the highest atomic radius in its period?
Alkaline earth metals
Alkali metals
Chalcogens
Halogens
3910. In metals, why does electric conductivity decrease with the increase of temperature?
Electron movement decreases
Metal ion oscillation hinders electrons
Electron direction changes
Collision of electrons causes heat flow
3911. Which oxyacid of halogen is a strong oxidizing agent?
HClO₄
HClO₂
HClO₃
HClO
3912. What is the proton (atomic number) of an element that has four unpaired electrons in its ground state?
6
21
22
26
3913. Which of the following has the smallest atomic radius?
Mg
S
P
Na
3914. The difference of lithium from the other alkali metals is mainly because of:
Large radius, low charge density
Small radius, low charge density
Large radius, high charge density
Small radius, high charge density
3915. Ionization energy increases along a period in the periodic table due to:
No. of positrons
Nuclear charge
No. of neutrons
No. of electrons
3916. Ca(Z = 20) forms an ionic bond with Cl(Z = 17). What is the chemical formula of calcium chloride
CaCl
CaCl₂
Ca₂Cl₂
Ca₂Cl
3917. Which of the following has the smallest size?
Mg
S
P
Na
3918. Which element has smaller shielding effect among the following?
Mg
Ca
Rb
Sr
3919. The first ionization energy of Al is less than Mg. This is due to:
Electron in 3p of Al
Al is less metallic than Mg
Mg comes first than Al
Ionization energy from Mg to Al decreases
3920. Which one of the following elements has the largest second ionization energy?
K
Ca
Cl
Bi
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