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

315905 The melting point of a mixture of \(\mathrm{Na}_{2} \mathrm{CO}_{3}\) and \(\mathrm{K}_{2} \mathrm{CO}_{3}\) is

1 Higher than that of \(\mathrm{Na}_{2} \mathrm{CO}_{3}\)
2 Higher than that of \(\mathrm{K}_{2} \mathrm{CO}_{3}\)
3 lower than that of both \(\mathrm{Na}_{2} \mathrm{CO}_{3}\) and \(\mathrm{K}_{2} \mathrm{CO}_{3}\)
4 lower than that of \(\mathrm{K}_{2} \mathrm{CO}_{3}\) only
CHXI10:THE S-BLOCK ELEMENTS

315906 Which of the following statements is/are incorrect regarding the s-block elements?
I. Francium is highly radioactive element.
II. Oxides and hydroxides of alkali metals and alkaline earth metals are not alkaline in nature.
III. Sodium and potassium are the only two sblock elements that are found in large proportion in biological fluids.
IV. Biological function of \(\mathrm{s}\) - block elemetns includes maintenance of balance and nerve impulse conduction.

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

315907 Fusion mixture contains:

1 \(\mathrm{K}_{2} \mathrm{CO}_{3}+\mathrm{Na}_{2} \mathrm{CO}_{3}\)
2 \(\mathrm{KNO}_{3}\)
3 \(\mathrm{NaNO}_{3}\)
4 \(\mathrm{K}_{2} \mathrm{CO}_{3}+\mathrm{NaNO}_{3}\)
CHXI10:THE S-BLOCK ELEMENTS

315908 Bordeaux mixture consists of

1 \(\mathrm{CuSO}_{4}+\mathrm{Ca}(\mathrm{OH})_{2}\)
2 \(\mathrm{CuSO}_{4}+\mathrm{CaCl}_{2}\)
3 \(\mathrm{ZnSO}_{4}+\mathrm{Mg}(\mathrm{OH})_{2}\)
4 \(\mathrm{FeSO}_{4}+\mathrm{Ba}(\mathrm{OH})_{2}\)
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CHXI10:THE S-BLOCK ELEMENTS

315905 The melting point of a mixture of \(\mathrm{Na}_{2} \mathrm{CO}_{3}\) and \(\mathrm{K}_{2} \mathrm{CO}_{3}\) is

1 Higher than that of \(\mathrm{Na}_{2} \mathrm{CO}_{3}\)
2 Higher than that of \(\mathrm{K}_{2} \mathrm{CO}_{3}\)
3 lower than that of both \(\mathrm{Na}_{2} \mathrm{CO}_{3}\) and \(\mathrm{K}_{2} \mathrm{CO}_{3}\)
4 lower than that of \(\mathrm{K}_{2} \mathrm{CO}_{3}\) only
CHXI10:THE S-BLOCK ELEMENTS

315906 Which of the following statements is/are incorrect regarding the s-block elements?
I. Francium is highly radioactive element.
II. Oxides and hydroxides of alkali metals and alkaline earth metals are not alkaline in nature.
III. Sodium and potassium are the only two sblock elements that are found in large proportion in biological fluids.
IV. Biological function of \(\mathrm{s}\) - block elemetns includes maintenance of balance and nerve impulse conduction.

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

315907 Fusion mixture contains:

1 \(\mathrm{K}_{2} \mathrm{CO}_{3}+\mathrm{Na}_{2} \mathrm{CO}_{3}\)
2 \(\mathrm{KNO}_{3}\)
3 \(\mathrm{NaNO}_{3}\)
4 \(\mathrm{K}_{2} \mathrm{CO}_{3}+\mathrm{NaNO}_{3}\)
CHXI10:THE S-BLOCK ELEMENTS

315908 Bordeaux mixture consists of

1 \(\mathrm{CuSO}_{4}+\mathrm{Ca}(\mathrm{OH})_{2}\)
2 \(\mathrm{CuSO}_{4}+\mathrm{CaCl}_{2}\)
3 \(\mathrm{ZnSO}_{4}+\mathrm{Mg}(\mathrm{OH})_{2}\)
4 \(\mathrm{FeSO}_{4}+\mathrm{Ba}(\mathrm{OH})_{2}\)
CHXI10:THE S-BLOCK ELEMENTS

315905 The melting point of a mixture of \(\mathrm{Na}_{2} \mathrm{CO}_{3}\) and \(\mathrm{K}_{2} \mathrm{CO}_{3}\) is

1 Higher than that of \(\mathrm{Na}_{2} \mathrm{CO}_{3}\)
2 Higher than that of \(\mathrm{K}_{2} \mathrm{CO}_{3}\)
3 lower than that of both \(\mathrm{Na}_{2} \mathrm{CO}_{3}\) and \(\mathrm{K}_{2} \mathrm{CO}_{3}\)
4 lower than that of \(\mathrm{K}_{2} \mathrm{CO}_{3}\) only
CHXI10:THE S-BLOCK ELEMENTS

315906 Which of the following statements is/are incorrect regarding the s-block elements?
I. Francium is highly radioactive element.
II. Oxides and hydroxides of alkali metals and alkaline earth metals are not alkaline in nature.
III. Sodium and potassium are the only two sblock elements that are found in large proportion in biological fluids.
IV. Biological function of \(\mathrm{s}\) - block elemetns includes maintenance of balance and nerve impulse conduction.

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

315907 Fusion mixture contains:

1 \(\mathrm{K}_{2} \mathrm{CO}_{3}+\mathrm{Na}_{2} \mathrm{CO}_{3}\)
2 \(\mathrm{KNO}_{3}\)
3 \(\mathrm{NaNO}_{3}\)
4 \(\mathrm{K}_{2} \mathrm{CO}_{3}+\mathrm{NaNO}_{3}\)
CHXI10:THE S-BLOCK ELEMENTS

315908 Bordeaux mixture consists of

1 \(\mathrm{CuSO}_{4}+\mathrm{Ca}(\mathrm{OH})_{2}\)
2 \(\mathrm{CuSO}_{4}+\mathrm{CaCl}_{2}\)
3 \(\mathrm{ZnSO}_{4}+\mathrm{Mg}(\mathrm{OH})_{2}\)
4 \(\mathrm{FeSO}_{4}+\mathrm{Ba}(\mathrm{OH})_{2}\)
CHXI10:THE S-BLOCK ELEMENTS

315905 The melting point of a mixture of \(\mathrm{Na}_{2} \mathrm{CO}_{3}\) and \(\mathrm{K}_{2} \mathrm{CO}_{3}\) is

1 Higher than that of \(\mathrm{Na}_{2} \mathrm{CO}_{3}\)
2 Higher than that of \(\mathrm{K}_{2} \mathrm{CO}_{3}\)
3 lower than that of both \(\mathrm{Na}_{2} \mathrm{CO}_{3}\) and \(\mathrm{K}_{2} \mathrm{CO}_{3}\)
4 lower than that of \(\mathrm{K}_{2} \mathrm{CO}_{3}\) only
CHXI10:THE S-BLOCK ELEMENTS

315906 Which of the following statements is/are incorrect regarding the s-block elements?
I. Francium is highly radioactive element.
II. Oxides and hydroxides of alkali metals and alkaline earth metals are not alkaline in nature.
III. Sodium and potassium are the only two sblock elements that are found in large proportion in biological fluids.
IV. Biological function of \(\mathrm{s}\) - block elemetns includes maintenance of balance and nerve impulse conduction.

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

315907 Fusion mixture contains:

1 \(\mathrm{K}_{2} \mathrm{CO}_{3}+\mathrm{Na}_{2} \mathrm{CO}_{3}\)
2 \(\mathrm{KNO}_{3}\)
3 \(\mathrm{NaNO}_{3}\)
4 \(\mathrm{K}_{2} \mathrm{CO}_{3}+\mathrm{NaNO}_{3}\)
CHXI10:THE S-BLOCK ELEMENTS

315908 Bordeaux mixture consists of

1 \(\mathrm{CuSO}_{4}+\mathrm{Ca}(\mathrm{OH})_{2}\)
2 \(\mathrm{CuSO}_{4}+\mathrm{CaCl}_{2}\)
3 \(\mathrm{ZnSO}_{4}+\mathrm{Mg}(\mathrm{OH})_{2}\)
4 \(\mathrm{FeSO}_{4}+\mathrm{Ba}(\mathrm{OH})_{2}\)