Modern Periodic Table - Maharashtra Board STD 11 Chemistry Questions

Q 1MCQ1 Mark

Which of the following pair of elements has similar properties ?

✓
13, 31
B
11, 20
C
12, 10
D
21, 33

Answer: A.

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Q 2MCQ1 Mark

Which of the following pairs is NOT isoelectronic ?

A
$Na ^{+}$and $Na$
✓
$Mg ^{2+}$ and $Ne$
C
$Al ^{3+}$ and $B ^{3+}$
D
$P ^{3-}$ and $N ^{3-}$

Answer: B.

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Q 3MCQ1 Mark

Which of the atomic number represent the s-block elements ?

A
7, 15
✓
3, 12
C
6, 14
D
9, 17

Answer: B.

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Q 4MCQ1 Mark

In which group of elements of the modern periodic table are halogen placed ?

✓
17
B
6
C
4
D
2

Answer: A.

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Q 5MCQ1 Mark

If the valence shell electronic configuration is $n s^2 n p^5$, the element will belong to

A
alkali metals
✓
halogens
C
alkaline earth metals
D
actinides

Answer: B.

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Q 6Answer the following questions:1 Mark

Write the outer electronic configuration of the following using orbital notation method.
Cu (belongs to period 4 and group 11)

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Q 7Answer the following questions:1 Mark

Write the outer electronic configuration of the following using orbital notation method.
Po (belongs to period 6 and group 16)

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Q 8Answer the following questions:1 Mark

Write the outer electronic configuration of the following using orbital notation method.
Ge (belongs to period 4 and group 14)

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Q 9Answer the following questions:1 Mark

Nonmetallic character increases down a group.

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Q 10Answer the following questions:1 Mark

Nonmetallic character increases from left to right across a period.

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Q 11Answer the following in one or two sentences.2 Marks

Why the elements belonging to the same group do have similar chemical properties ?

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Q 12Answer the following in one or two sentences.2 Marks

Why the second ionization enthalpy is greater than the first ionization enthalpy ?

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Q 13Answer the following in one or two sentences.2 Marks

For each of the following pairs, indicate which of the two species is of large size :
a. $Fe ^{2+}$ or $Fe ^{3+}$
b. $Mg ^{2+}$ or $Ca ^{2+}$

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Q 14Answer the following in one or two sentences.2 Marks

Select the smaller ion form each of the following pairs:
a. $K ^{+}, Li ^{+}$
b. $N ^3, F^{-}$

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Q 15Answer the following in one or two sentences.2 Marks

Name the scientists who made the classification of elements in the nineteenth century.

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Q 16Answer the following in brief.3 Marks

Which principle is followed in the distribution of electrons in an atom?

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Q 17Answer the following in brief.3 Marks

What does the principal quantum number ‘n’ and azimuthal quantum number ‘l’ of an electron belonging to an atom represent?

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Q 18Answer the following in brief.3 Marks

Ionization enthalpy of Li is $520 kJ mol^{-1}$ while that of F is $1681 kJ mol^{-1}$. Explain.

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Q 19Answer the following in brief.3 Marks

he ionic radii of $F^–$ and $Na^+$ are $133$ and $98 \ pm$, respectively.

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Q 20Answer the following in brief.3 Marks

The elements Li, B, Be and N have the electronegativities 1.0, 2.0, 1.5, and 3.0, respectively on the Pauling scale.

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Q 21Answer the following questions.4 Marks

Explain : electronegativity and electron gain enthalpy. Which of the two can be measured experimentally?

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Q 22Answer the following questions.4 Marks

Explain the screening effect with a suitable example.

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Q 23Answer the following questions.4 Marks

La belongs to group $3$ while Hg belongs to group $12$ and both belong to period 6 of the periodic table.
Write down the general outer electronic configuration of the ten elements from La to Hg together using orbital notation method.

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Q 24Answer the following questions.4 Marks

Cu forms coloured salts while Zn forms colourless salts.

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Q 25Answer the following questions.4 Marks

${ }_{13} Al$ is a metal, ${ }_{14} Si$ is a metalloid and ${ }_{15} P$ is a nonmetal.

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Modern Periodic Table questions

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Modern Periodic Table Chemistry - Modern Periodic Table

Modern Periodic Table question types

Modern Periodic Table questions

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