Miscellaneous Questions based on Group 1 Elements
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CHXI10:THE S-BLOCK ELEMENTS

315900 Which of the following statement is false for alkali metals?

1 Lithium is the strongest reducing agent
2 \(\mathrm{Na}\) is amphoteric in nature
3 Size of \(\mathrm{Li}^{+}\)is small
4 All alkali metals give blue solution in liquid ammonia
CHXI10:THE S-BLOCK ELEMENTS

315901 Identify the incorrect statement from the following

1 The oxidation number of \(\mathrm{K}\) in \(\mathrm{KO}_{2}\) is +4 .
2 Ionisation enthalpy of alkali metals decreases from top to bottom in the group.
3 Lithium is the strongest reducing agent among the alkali metals.
4 Alkali metals react with water to form their hydroxides.
NEET - 2022
CHXI10:THE S-BLOCK ELEMENTS

315902 Gun powder is:

1 \(\mathrm{KNO}_{3}+\) Charcoal \(+\mathrm{S}\)
2 \(\mathrm{NaNO}_{3}+\mathrm{KNO}_{3}+\mathrm{S}\)
3 \(\mathrm{NaNO}_{3}+\mathrm{S}\)
4 \(\mathrm{NaNO}_{3}+\mathrm{NH}_{4} \mathrm{NO}_{3}\)
CHXI10:THE S-BLOCK ELEMENTS

315903 Consider the following points
(a) Cs is the strongest reducing agent in IA group element
(b) Be does not form peroxide
(c) The density of potassium is less than sodium
(d) In alkali metals \(\mathrm{Li}, \mathrm{Na}, \mathrm{K}\) and \(\mathrm{Rb}\), lithium has the minimum value of M.P.
Correct statements are

1 (a) & (b) are correct
2 (a), (b) & (c) are correct
3 (b) & (c) are correct
4 (b), (c) & (d) are correct
CHXI10:THE S-BLOCK ELEMENTS

315904 Which of the following statements is/are incorrect regarding property of alkali metals?
I. Alkali metal on reaction with water produces a gas as a by-product which burns with poping sound.
II. Alkali metal dissolves in excess of ammonia to produce bronze colour liquid.
III. Alkali metal halides are ionic in nature.
IV. All alkali metal hydrides are ionic in nature.

1 I, II and III
2 Only II
3 II and IV
4 Only IV
NEET DIGITAL LIBRARY
CHXI10:THE S-BLOCK ELEMENTS

315900 Which of the following statement is false for alkali metals?

1 Lithium is the strongest reducing agent
2 \(\mathrm{Na}\) is amphoteric in nature
3 Size of \(\mathrm{Li}^{+}\)is small
4 All alkali metals give blue solution in liquid ammonia
CHXI10:THE S-BLOCK ELEMENTS

315901 Identify the incorrect statement from the following

1 The oxidation number of \(\mathrm{K}\) in \(\mathrm{KO}_{2}\) is +4 .
2 Ionisation enthalpy of alkali metals decreases from top to bottom in the group.
3 Lithium is the strongest reducing agent among the alkali metals.
4 Alkali metals react with water to form their hydroxides.
NEET - 2022
CHXI10:THE S-BLOCK ELEMENTS

315902 Gun powder is:

1 \(\mathrm{KNO}_{3}+\) Charcoal \(+\mathrm{S}\)
2 \(\mathrm{NaNO}_{3}+\mathrm{KNO}_{3}+\mathrm{S}\)
3 \(\mathrm{NaNO}_{3}+\mathrm{S}\)
4 \(\mathrm{NaNO}_{3}+\mathrm{NH}_{4} \mathrm{NO}_{3}\)
CHXI10:THE S-BLOCK ELEMENTS

315903 Consider the following points
(a) Cs is the strongest reducing agent in IA group element
(b) Be does not form peroxide
(c) The density of potassium is less than sodium
(d) In alkali metals \(\mathrm{Li}, \mathrm{Na}, \mathrm{K}\) and \(\mathrm{Rb}\), lithium has the minimum value of M.P.
Correct statements are

1 (a) & (b) are correct
2 (a), (b) & (c) are correct
3 (b) & (c) are correct
4 (b), (c) & (d) are correct
CHXI10:THE S-BLOCK ELEMENTS

315904 Which of the following statements is/are incorrect regarding property of alkali metals?
I. Alkali metal on reaction with water produces a gas as a by-product which burns with poping sound.
II. Alkali metal dissolves in excess of ammonia to produce bronze colour liquid.
III. Alkali metal halides are ionic in nature.
IV. All alkali metal hydrides are ionic in nature.

1 I, II and III
2 Only II
3 II and IV
4 Only IV
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CHXI10:THE S-BLOCK ELEMENTS

315900 Which of the following statement is false for alkali metals?

1 Lithium is the strongest reducing agent
2 \(\mathrm{Na}\) is amphoteric in nature
3 Size of \(\mathrm{Li}^{+}\)is small
4 All alkali metals give blue solution in liquid ammonia
CHXI10:THE S-BLOCK ELEMENTS

315901 Identify the incorrect statement from the following

1 The oxidation number of \(\mathrm{K}\) in \(\mathrm{KO}_{2}\) is +4 .
2 Ionisation enthalpy of alkali metals decreases from top to bottom in the group.
3 Lithium is the strongest reducing agent among the alkali metals.
4 Alkali metals react with water to form their hydroxides.
NEET - 2022
CHXI10:THE S-BLOCK ELEMENTS

315902 Gun powder is:

1 \(\mathrm{KNO}_{3}+\) Charcoal \(+\mathrm{S}\)
2 \(\mathrm{NaNO}_{3}+\mathrm{KNO}_{3}+\mathrm{S}\)
3 \(\mathrm{NaNO}_{3}+\mathrm{S}\)
4 \(\mathrm{NaNO}_{3}+\mathrm{NH}_{4} \mathrm{NO}_{3}\)
CHXI10:THE S-BLOCK ELEMENTS

315903 Consider the following points
(a) Cs is the strongest reducing agent in IA group element
(b) Be does not form peroxide
(c) The density of potassium is less than sodium
(d) In alkali metals \(\mathrm{Li}, \mathrm{Na}, \mathrm{K}\) and \(\mathrm{Rb}\), lithium has the minimum value of M.P.
Correct statements are

1 (a) & (b) are correct
2 (a), (b) & (c) are correct
3 (b) & (c) are correct
4 (b), (c) & (d) are correct
CHXI10:THE S-BLOCK ELEMENTS

315904 Which of the following statements is/are incorrect regarding property of alkali metals?
I. Alkali metal on reaction with water produces a gas as a by-product which burns with poping sound.
II. Alkali metal dissolves in excess of ammonia to produce bronze colour liquid.
III. Alkali metal halides are ionic in nature.
IV. All alkali metal hydrides are ionic in nature.

1 I, II and III
2 Only II
3 II and IV
4 Only IV
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CHXI10:THE S-BLOCK ELEMENTS

315900 Which of the following statement is false for alkali metals?

1 Lithium is the strongest reducing agent
2 \(\mathrm{Na}\) is amphoteric in nature
3 Size of \(\mathrm{Li}^{+}\)is small
4 All alkali metals give blue solution in liquid ammonia
CHXI10:THE S-BLOCK ELEMENTS

315901 Identify the incorrect statement from the following

1 The oxidation number of \(\mathrm{K}\) in \(\mathrm{KO}_{2}\) is +4 .
2 Ionisation enthalpy of alkali metals decreases from top to bottom in the group.
3 Lithium is the strongest reducing agent among the alkali metals.
4 Alkali metals react with water to form their hydroxides.
NEET - 2022
CHXI10:THE S-BLOCK ELEMENTS

315902 Gun powder is:

1 \(\mathrm{KNO}_{3}+\) Charcoal \(+\mathrm{S}\)
2 \(\mathrm{NaNO}_{3}+\mathrm{KNO}_{3}+\mathrm{S}\)
3 \(\mathrm{NaNO}_{3}+\mathrm{S}\)
4 \(\mathrm{NaNO}_{3}+\mathrm{NH}_{4} \mathrm{NO}_{3}\)
CHXI10:THE S-BLOCK ELEMENTS

315903 Consider the following points
(a) Cs is the strongest reducing agent in IA group element
(b) Be does not form peroxide
(c) The density of potassium is less than sodium
(d) In alkali metals \(\mathrm{Li}, \mathrm{Na}, \mathrm{K}\) and \(\mathrm{Rb}\), lithium has the minimum value of M.P.
Correct statements are

1 (a) & (b) are correct
2 (a), (b) & (c) are correct
3 (b) & (c) are correct
4 (b), (c) & (d) are correct
CHXI10:THE S-BLOCK ELEMENTS

315904 Which of the following statements is/are incorrect regarding property of alkali metals?
I. Alkali metal on reaction with water produces a gas as a by-product which burns with poping sound.
II. Alkali metal dissolves in excess of ammonia to produce bronze colour liquid.
III. Alkali metal halides are ionic in nature.
IV. All alkali metal hydrides are ionic in nature.

1 I, II and III
2 Only II
3 II and IV
4 Only IV
NEET DIGITAL LIBRARY
CHXI10:THE S-BLOCK ELEMENTS

315900 Which of the following statement is false for alkali metals?

1 Lithium is the strongest reducing agent
2 \(\mathrm{Na}\) is amphoteric in nature
3 Size of \(\mathrm{Li}^{+}\)is small
4 All alkali metals give blue solution in liquid ammonia
CHXI10:THE S-BLOCK ELEMENTS

315901 Identify the incorrect statement from the following

1 The oxidation number of \(\mathrm{K}\) in \(\mathrm{KO}_{2}\) is +4 .
2 Ionisation enthalpy of alkali metals decreases from top to bottom in the group.
3 Lithium is the strongest reducing agent among the alkali metals.
4 Alkali metals react with water to form their hydroxides.
NEET - 2022
CHXI10:THE S-BLOCK ELEMENTS

315902 Gun powder is:

1 \(\mathrm{KNO}_{3}+\) Charcoal \(+\mathrm{S}\)
2 \(\mathrm{NaNO}_{3}+\mathrm{KNO}_{3}+\mathrm{S}\)
3 \(\mathrm{NaNO}_{3}+\mathrm{S}\)
4 \(\mathrm{NaNO}_{3}+\mathrm{NH}_{4} \mathrm{NO}_{3}\)
CHXI10:THE S-BLOCK ELEMENTS

315903 Consider the following points
(a) Cs is the strongest reducing agent in IA group element
(b) Be does not form peroxide
(c) The density of potassium is less than sodium
(d) In alkali metals \(\mathrm{Li}, \mathrm{Na}, \mathrm{K}\) and \(\mathrm{Rb}\), lithium has the minimum value of M.P.
Correct statements are

1 (a) & (b) are correct
2 (a), (b) & (c) are correct
3 (b) & (c) are correct
4 (b), (c) & (d) are correct
CHXI10:THE S-BLOCK ELEMENTS

315904 Which of the following statements is/are incorrect regarding property of alkali metals?
I. Alkali metal on reaction with water produces a gas as a by-product which burns with poping sound.
II. Alkali metal dissolves in excess of ammonia to produce bronze colour liquid.
III. Alkali metal halides are ionic in nature.
IV. All alkali metal hydrides are ionic in nature.

1 I, II and III
2 Only II
3 II and IV
4 Only IV