Uses of Alkali Metals and Its Compounds
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CHXI10:THE S-BLOCK ELEMENTS

316023 \({\rm{K}}{{\rm{O}}_{\rm{2}}}\) (potassium super oxide) is used in oxygen cylinders in space and submarines because it

1 absorbs \(\mathrm{CO}_{2}\) and increases \(\mathrm{O}_{2}\) contents
2 eliminates moisture
3 absorbs \(\mathrm{CO}_{2}\)
4 produces ozone
CHXI10:THE S-BLOCK ELEMENTS

316024 Which of the following is used as a source of oxygen in space capsules, submarines and breathing masks?

1 \(\mathrm{Li}_{2} \mathrm{O}\)
2 \(\mathrm{Na}_{2} \mathrm{O}_{2}\)
3 \(\mathrm{KO}_{2}\)
4 \(\mathrm{K}_{2} \mathrm{O}_{2}\)
CHXI10:THE S-BLOCK ELEMENTS

316025 Salt used of performing bead test in qualitative inorganic analysis is

1 \(\mathrm{K}_{2} \mathrm{SO}_{4} \cdot \mathrm{Al}_{2}\left(\mathrm{SO}_{4}\right)_{3} \cdot 24 \mathrm{H}_{2} \mathrm{O}\)
2 \(\mathrm{FeSO}_{4} \cdot\left(\mathrm{NH}_{4}\right)_{2} \mathrm{SO}_{4} \cdot 6 \mathrm{H}_{2} \mathrm{O}\)
3 \(\mathrm{Na}\left(\mathrm{NH}_{4}\right) \mathrm{HPO}_{4} \cdot 4 \mathrm{H}_{2} \mathrm{O}\)
4 \(\mathrm{CuSO}_{4} \cdot 5 \mathrm{H}_{2} \mathrm{O}\)
CHXI10:THE S-BLOCK ELEMENTS

316026 The following is used in the softening of water

1 \(\mathrm{NaHCO}_{3}\)
2 \(\mathrm{Na}_{2} \mathrm{CO}_{3}\)
3 \(\mathrm{Na}_{2} \mathrm{O}_{2}\)
4 \(\mathrm{Na}_{2} \mathrm{SO}_{4}\)
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CHXI10:THE S-BLOCK ELEMENTS

316023 \({\rm{K}}{{\rm{O}}_{\rm{2}}}\) (potassium super oxide) is used in oxygen cylinders in space and submarines because it

1 absorbs \(\mathrm{CO}_{2}\) and increases \(\mathrm{O}_{2}\) contents
2 eliminates moisture
3 absorbs \(\mathrm{CO}_{2}\)
4 produces ozone
CHXI10:THE S-BLOCK ELEMENTS

316024 Which of the following is used as a source of oxygen in space capsules, submarines and breathing masks?

1 \(\mathrm{Li}_{2} \mathrm{O}\)
2 \(\mathrm{Na}_{2} \mathrm{O}_{2}\)
3 \(\mathrm{KO}_{2}\)
4 \(\mathrm{K}_{2} \mathrm{O}_{2}\)
CHXI10:THE S-BLOCK ELEMENTS

316025 Salt used of performing bead test in qualitative inorganic analysis is

1 \(\mathrm{K}_{2} \mathrm{SO}_{4} \cdot \mathrm{Al}_{2}\left(\mathrm{SO}_{4}\right)_{3} \cdot 24 \mathrm{H}_{2} \mathrm{O}\)
2 \(\mathrm{FeSO}_{4} \cdot\left(\mathrm{NH}_{4}\right)_{2} \mathrm{SO}_{4} \cdot 6 \mathrm{H}_{2} \mathrm{O}\)
3 \(\mathrm{Na}\left(\mathrm{NH}_{4}\right) \mathrm{HPO}_{4} \cdot 4 \mathrm{H}_{2} \mathrm{O}\)
4 \(\mathrm{CuSO}_{4} \cdot 5 \mathrm{H}_{2} \mathrm{O}\)
CHXI10:THE S-BLOCK ELEMENTS

316026 The following is used in the softening of water

1 \(\mathrm{NaHCO}_{3}\)
2 \(\mathrm{Na}_{2} \mathrm{CO}_{3}\)
3 \(\mathrm{Na}_{2} \mathrm{O}_{2}\)
4 \(\mathrm{Na}_{2} \mathrm{SO}_{4}\)
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CHXI10:THE S-BLOCK ELEMENTS

316023 \({\rm{K}}{{\rm{O}}_{\rm{2}}}\) (potassium super oxide) is used in oxygen cylinders in space and submarines because it

1 absorbs \(\mathrm{CO}_{2}\) and increases \(\mathrm{O}_{2}\) contents
2 eliminates moisture
3 absorbs \(\mathrm{CO}_{2}\)
4 produces ozone
CHXI10:THE S-BLOCK ELEMENTS

316024 Which of the following is used as a source of oxygen in space capsules, submarines and breathing masks?

1 \(\mathrm{Li}_{2} \mathrm{O}\)
2 \(\mathrm{Na}_{2} \mathrm{O}_{2}\)
3 \(\mathrm{KO}_{2}\)
4 \(\mathrm{K}_{2} \mathrm{O}_{2}\)
CHXI10:THE S-BLOCK ELEMENTS

316025 Salt used of performing bead test in qualitative inorganic analysis is

1 \(\mathrm{K}_{2} \mathrm{SO}_{4} \cdot \mathrm{Al}_{2}\left(\mathrm{SO}_{4}\right)_{3} \cdot 24 \mathrm{H}_{2} \mathrm{O}\)
2 \(\mathrm{FeSO}_{4} \cdot\left(\mathrm{NH}_{4}\right)_{2} \mathrm{SO}_{4} \cdot 6 \mathrm{H}_{2} \mathrm{O}\)
3 \(\mathrm{Na}\left(\mathrm{NH}_{4}\right) \mathrm{HPO}_{4} \cdot 4 \mathrm{H}_{2} \mathrm{O}\)
4 \(\mathrm{CuSO}_{4} \cdot 5 \mathrm{H}_{2} \mathrm{O}\)
CHXI10:THE S-BLOCK ELEMENTS

316026 The following is used in the softening of water

1 \(\mathrm{NaHCO}_{3}\)
2 \(\mathrm{Na}_{2} \mathrm{CO}_{3}\)
3 \(\mathrm{Na}_{2} \mathrm{O}_{2}\)
4 \(\mathrm{Na}_{2} \mathrm{SO}_{4}\)
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CHXI10:THE S-BLOCK ELEMENTS

316023 \({\rm{K}}{{\rm{O}}_{\rm{2}}}\) (potassium super oxide) is used in oxygen cylinders in space and submarines because it

1 absorbs \(\mathrm{CO}_{2}\) and increases \(\mathrm{O}_{2}\) contents
2 eliminates moisture
3 absorbs \(\mathrm{CO}_{2}\)
4 produces ozone
CHXI10:THE S-BLOCK ELEMENTS

316024 Which of the following is used as a source of oxygen in space capsules, submarines and breathing masks?

1 \(\mathrm{Li}_{2} \mathrm{O}\)
2 \(\mathrm{Na}_{2} \mathrm{O}_{2}\)
3 \(\mathrm{KO}_{2}\)
4 \(\mathrm{K}_{2} \mathrm{O}_{2}\)
CHXI10:THE S-BLOCK ELEMENTS

316025 Salt used of performing bead test in qualitative inorganic analysis is

1 \(\mathrm{K}_{2} \mathrm{SO}_{4} \cdot \mathrm{Al}_{2}\left(\mathrm{SO}_{4}\right)_{3} \cdot 24 \mathrm{H}_{2} \mathrm{O}\)
2 \(\mathrm{FeSO}_{4} \cdot\left(\mathrm{NH}_{4}\right)_{2} \mathrm{SO}_{4} \cdot 6 \mathrm{H}_{2} \mathrm{O}\)
3 \(\mathrm{Na}\left(\mathrm{NH}_{4}\right) \mathrm{HPO}_{4} \cdot 4 \mathrm{H}_{2} \mathrm{O}\)
4 \(\mathrm{CuSO}_{4} \cdot 5 \mathrm{H}_{2} \mathrm{O}\)
CHXI10:THE S-BLOCK ELEMENTS

316026 The following is used in the softening of water

1 \(\mathrm{NaHCO}_{3}\)
2 \(\mathrm{Na}_{2} \mathrm{CO}_{3}\)
3 \(\mathrm{Na}_{2} \mathrm{O}_{2}\)
4 \(\mathrm{Na}_{2} \mathrm{SO}_{4}\)
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