Dihydrogen
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CHXI09:HYDROGEN

315473 On earth hydrogen is rarely found in its uncombined state because

1 It is highly inflammable
2 It combines with oxygen to give water
3 The earth's gravity is too weak to hold such light molecules
4 It has three isotopes.
CHXI09:HYDROGEN

315474 An element reacts with hydrogen to form a compound ' \(\mathrm{A}\) ' which on treatment with water liberates hydrogen gas. The element can be

1 nitrogen
2 chlorine
3 calcium
4 selenium
CHXI09:HYDROGEN

315475 Among the following, the correct statement regarding hydrogen is

1 it can form compounds with +1 as well as \( - 1\) oxidation states.
2 it is always collected at cathode.
3 it has very high ionization energy.
4 it has same electronegativity as halogens.
CHXI09:HYDROGEN

315476 Bond dissociation enthalpies of \(\mathrm{\mathrm{H}-\mathrm{H}, \mathrm{D}-\mathrm{D}}\) and \(\mathrm{\mathrm{F}-\mathrm{F}}\) in increasing order is

1 \(\mathrm{H_{2}>D_{2}>F_{2}}\)
2 \(\mathrm{\mathrm{D}_{2}>\mathrm{F}_{2}>\mathrm{H}_{2}}\)
3 \(\mathrm{\mathrm{D}_{2}>\mathrm{H}_{2}>\mathrm{F}_{2}}\)
4 \(\mathrm{\mathrm{F}_{2}>\mathrm{D}_{2}>\mathrm{H}_{2}}\)
CHXI09:HYDROGEN

315500 Why is water gas (mixture of \(\mathrm{\mathrm{CO}}\) and \(\mathrm{\mathrm{H}_{2}}\) ) also called 'syn gas'?

1 Because it is synthesised from sewage, saw - dust, scrap wood etc.
2 Because it is synthesised from methane gas
3 Because it is used in the synthesis of methanol and a number of hydrocarbons
4 None of these
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CHXI09:HYDROGEN

315473 On earth hydrogen is rarely found in its uncombined state because

1 It is highly inflammable
2 It combines with oxygen to give water
3 The earth's gravity is too weak to hold such light molecules
4 It has three isotopes.
CHXI09:HYDROGEN

315474 An element reacts with hydrogen to form a compound ' \(\mathrm{A}\) ' which on treatment with water liberates hydrogen gas. The element can be

1 nitrogen
2 chlorine
3 calcium
4 selenium
CHXI09:HYDROGEN

315475 Among the following, the correct statement regarding hydrogen is

1 it can form compounds with +1 as well as \( - 1\) oxidation states.
2 it is always collected at cathode.
3 it has very high ionization energy.
4 it has same electronegativity as halogens.
CHXI09:HYDROGEN

315476 Bond dissociation enthalpies of \(\mathrm{\mathrm{H}-\mathrm{H}, \mathrm{D}-\mathrm{D}}\) and \(\mathrm{\mathrm{F}-\mathrm{F}}\) in increasing order is

1 \(\mathrm{H_{2}>D_{2}>F_{2}}\)
2 \(\mathrm{\mathrm{D}_{2}>\mathrm{F}_{2}>\mathrm{H}_{2}}\)
3 \(\mathrm{\mathrm{D}_{2}>\mathrm{H}_{2}>\mathrm{F}_{2}}\)
4 \(\mathrm{\mathrm{F}_{2}>\mathrm{D}_{2}>\mathrm{H}_{2}}\)
CHXI09:HYDROGEN

315500 Why is water gas (mixture of \(\mathrm{\mathrm{CO}}\) and \(\mathrm{\mathrm{H}_{2}}\) ) also called 'syn gas'?

1 Because it is synthesised from sewage, saw - dust, scrap wood etc.
2 Because it is synthesised from methane gas
3 Because it is used in the synthesis of methanol and a number of hydrocarbons
4 None of these
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CHXI09:HYDROGEN

315473 On earth hydrogen is rarely found in its uncombined state because

1 It is highly inflammable
2 It combines with oxygen to give water
3 The earth's gravity is too weak to hold such light molecules
4 It has three isotopes.
CHXI09:HYDROGEN

315474 An element reacts with hydrogen to form a compound ' \(\mathrm{A}\) ' which on treatment with water liberates hydrogen gas. The element can be

1 nitrogen
2 chlorine
3 calcium
4 selenium
CHXI09:HYDROGEN

315475 Among the following, the correct statement regarding hydrogen is

1 it can form compounds with +1 as well as \( - 1\) oxidation states.
2 it is always collected at cathode.
3 it has very high ionization energy.
4 it has same electronegativity as halogens.
CHXI09:HYDROGEN

315476 Bond dissociation enthalpies of \(\mathrm{\mathrm{H}-\mathrm{H}, \mathrm{D}-\mathrm{D}}\) and \(\mathrm{\mathrm{F}-\mathrm{F}}\) in increasing order is

1 \(\mathrm{H_{2}>D_{2}>F_{2}}\)
2 \(\mathrm{\mathrm{D}_{2}>\mathrm{F}_{2}>\mathrm{H}_{2}}\)
3 \(\mathrm{\mathrm{D}_{2}>\mathrm{H}_{2}>\mathrm{F}_{2}}\)
4 \(\mathrm{\mathrm{F}_{2}>\mathrm{D}_{2}>\mathrm{H}_{2}}\)
CHXI09:HYDROGEN

315500 Why is water gas (mixture of \(\mathrm{\mathrm{CO}}\) and \(\mathrm{\mathrm{H}_{2}}\) ) also called 'syn gas'?

1 Because it is synthesised from sewage, saw - dust, scrap wood etc.
2 Because it is synthesised from methane gas
3 Because it is used in the synthesis of methanol and a number of hydrocarbons
4 None of these
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CHXI09:HYDROGEN

315473 On earth hydrogen is rarely found in its uncombined state because

1 It is highly inflammable
2 It combines with oxygen to give water
3 The earth's gravity is too weak to hold such light molecules
4 It has three isotopes.
CHXI09:HYDROGEN

315474 An element reacts with hydrogen to form a compound ' \(\mathrm{A}\) ' which on treatment with water liberates hydrogen gas. The element can be

1 nitrogen
2 chlorine
3 calcium
4 selenium
CHXI09:HYDROGEN

315475 Among the following, the correct statement regarding hydrogen is

1 it can form compounds with +1 as well as \( - 1\) oxidation states.
2 it is always collected at cathode.
3 it has very high ionization energy.
4 it has same electronegativity as halogens.
CHXI09:HYDROGEN

315476 Bond dissociation enthalpies of \(\mathrm{\mathrm{H}-\mathrm{H}, \mathrm{D}-\mathrm{D}}\) and \(\mathrm{\mathrm{F}-\mathrm{F}}\) in increasing order is

1 \(\mathrm{H_{2}>D_{2}>F_{2}}\)
2 \(\mathrm{\mathrm{D}_{2}>\mathrm{F}_{2}>\mathrm{H}_{2}}\)
3 \(\mathrm{\mathrm{D}_{2}>\mathrm{H}_{2}>\mathrm{F}_{2}}\)
4 \(\mathrm{\mathrm{F}_{2}>\mathrm{D}_{2}>\mathrm{H}_{2}}\)
CHXI09:HYDROGEN

315500 Why is water gas (mixture of \(\mathrm{\mathrm{CO}}\) and \(\mathrm{\mathrm{H}_{2}}\) ) also called 'syn gas'?

1 Because it is synthesised from sewage, saw - dust, scrap wood etc.
2 Because it is synthesised from methane gas
3 Because it is used in the synthesis of methanol and a number of hydrocarbons
4 None of these
NEET DIGITAL LIBRARY
CHXI09:HYDROGEN

315473 On earth hydrogen is rarely found in its uncombined state because

1 It is highly inflammable
2 It combines with oxygen to give water
3 The earth's gravity is too weak to hold such light molecules
4 It has three isotopes.
CHXI09:HYDROGEN

315474 An element reacts with hydrogen to form a compound ' \(\mathrm{A}\) ' which on treatment with water liberates hydrogen gas. The element can be

1 nitrogen
2 chlorine
3 calcium
4 selenium
CHXI09:HYDROGEN

315475 Among the following, the correct statement regarding hydrogen is

1 it can form compounds with +1 as well as \( - 1\) oxidation states.
2 it is always collected at cathode.
3 it has very high ionization energy.
4 it has same electronegativity as halogens.
CHXI09:HYDROGEN

315476 Bond dissociation enthalpies of \(\mathrm{\mathrm{H}-\mathrm{H}, \mathrm{D}-\mathrm{D}}\) and \(\mathrm{\mathrm{F}-\mathrm{F}}\) in increasing order is

1 \(\mathrm{H_{2}>D_{2}>F_{2}}\)
2 \(\mathrm{\mathrm{D}_{2}>\mathrm{F}_{2}>\mathrm{H}_{2}}\)
3 \(\mathrm{\mathrm{D}_{2}>\mathrm{H}_{2}>\mathrm{F}_{2}}\)
4 \(\mathrm{\mathrm{F}_{2}>\mathrm{D}_{2}>\mathrm{H}_{2}}\)
CHXI09:HYDROGEN

315500 Why is water gas (mixture of \(\mathrm{\mathrm{CO}}\) and \(\mathrm{\mathrm{H}_{2}}\) ) also called 'syn gas'?

1 Because it is synthesised from sewage, saw - dust, scrap wood etc.
2 Because it is synthesised from methane gas
3 Because it is used in the synthesis of methanol and a number of hydrocarbons
4 None of these