Periodic Classification of Elements- 01

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Q1. Find the successive elements of the periodic table with ionisation energies, 2372, 520 and 890 kJ per mol respectively *

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Li, Be, B

H, He, Li

He, Li, Be

B, C, N

Q2. In the modern periodic table, the number of period of the element is the same as *

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atomic number

azimuthal quantum number

principal quantum number

atomic mass

Q3. The correct order for the size of I, I+, I– is *

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I > I+ > I–

I– > I > I+

I+ > I– > I

I > I– > I+

Q4. For the same value of n, the penetration power of orbital follows the order *

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s < p < d < f

s = p = d = f

p > s > d > f

f < d < p < s

Q5. Which of the reactions will need the maximum amount of energy? *

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Ca+ → Ca+2 + e–

K+ → K+ + e–

C+2 → C+3 + e–

Na → Na+ + e–

Q6. The correct order of electronegativity is *

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O > F > Cl > Br

F > Cl > Br > O

Cl > F > O > Br

F > O > Cl > Br

Q7. Two different beakers contain M1-O-H, and M2-O-H solutions separately. Find the nature of the two solutions if the electronegativity of M1 = 3.4, M2 = 1.2, O = 3.5, H = 2.1 *

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basic, basic

acidic, basic

acidic, acidic

basic, acidic

Q8. Which one is the most acidic among these? *

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Na2O

CaO

Al2O3

MgO

Q9. Which one will have the highest 2nd ionisation energy? *

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1s2 2s2 2p6

1s2 2s2 2p4

1s2 2s2 2p6 3s1

1s2 2s2 2p6 3s2

Q10. Which of them is most electronegative *

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