Although, nitrogen does not adsorb on a surface at room temperature, it adsorbs on the surface at 83 K. Which one of the following statements is correct?

At 83 K, there is formation of monolayer

At 83 K, nitrogen is adsorbed as atoms

At 83 K, nitrogen molecules are held by chemical bonds

At 83 K, there is formation of multimolecular layers

The vapour pressure of a solution of the liquids A (\[P{}^\circ =80\] mm Hg and \[{{x}_{A}}=0.4\]) and B (\[P{}^\circ =120\] mm Hg and \[{{X}_{B}}=0.6\]) is found to be \[100mm\]Hg. It shows that the solution exhibits

positive deviation from ideal behaviour

negative deviation from ideal behaviour

positive deviation for lower cone. and negative for higher cone.

Which of the following statements do not define the characteristic property of water "Water is a universal solvent"

It can dissolve maximum number of compounds

It has very low dielectric constant

Hydrogen peroxide in its reaction with \[Kl{{O}_{4}}\] and \[N{{H}_{2}}OH\] respectively, is acting as a

Reducing agent, oxidising agent

Oxidising agent, oxidising agent

Oxidising agent, reducing agent

Which statement is wrong?

In para hydrogen spin of two nuclei is in opposite direction.

Ordinary hydrogen is an equilibrium mixture of ortho and para hydrogen

In ortho hydrogen spin of two nuclei is in same direction

Ortho and para forms do not resemble in their chemical properties

In para hydrogen spin of two nuclei is in opposite direction.

Hydrogen molecules differs from chlorine molecule in the following respect

Hydrogen molecule is non-polar but chlorine molecule is polar

Hydrogen molecule is polar while chlorine molecule is non-polar

Hydrogen molecule can form intermolecular hydrogen bonds but chlorine molecule does not

Hydrogen molecule cannot participate in coordination bond formation but chlorine molecule can

When a sample of hard water is passed through the layer of sodium zeolite resulting which of the following ions will not be present in the resulting sample of water obtained?

\[C{{a}^{2+}}\] and \[N{{a}^{+}}\]

\[M{{g}^{2+}}\] and \[C{{a}^{2+}}\]

\[C{{a}^{2+}}\] and \[N{{a}^{+}}\]

\[M{{g}^{2+}}\] and \[CO_{3}^{2-}\]

\[CO_{3}^{2-}\] and \[C{{l}^{-}}\]

In which of the following reactions, \[{{H}_{2}}{{O}_{2}}\] is acting as a reducing agent

\[{{H}_{2}}{{O}_{2}}+S{{O}_{2}}\to {{H}_{2}}S{{O}_{4}}\]

\[2KI+{{H}_{2}}{{O}_{2}}\to 2KOH+{{I}_{2}}\]

\[PbS+4{{H}_{2}}{{O}_{2}}\to PbS{{O}_{4}}+4{{H}_{2}}O\]

\[A{{g}_{2}}O+{{H}_{2}}{{O}_{2}}\to 2Ag+{{H}_{2}}O+{{O}_{2}}\]

more or less identical in polarity with \[{{H}_{2}}S\]

Which of the following terms is not correct for hydrogen?

It exists both as \[{{H}^{+}}\] and \[{{H}^{-}}\] in different chemical compounds

It is the only species which has no neutrons in the nucleus

Heavy water is unstable because hydrogen is substituted by its isotope deuterium

Hard water is not fit for washing clothes because

it contains \[N{{a}_{2}}S{{O}_{4}}\] and \[KCl\]

Polyphosphates are used as water softening agents because they

form soluble complexes with anionic species

form soluble complexes with cationic species

Which of the following is wrong about \[{{H}_{2}}{{O}_{2}}\] It is used

as an aerating agent in production of sponge rubber

for restoring white colour of blackened lead painting

The dielectric constant of \[{{H}_{2}}{{O}_{2}}\] is 80. The electrostatic force of attraction between \[N{{a}^{+}}\] and \[C{{l}^{-}}\] will be

will be increased to 80 in water than in air

reduced to 1 /40 in water than in air

reduced to 1/80 in water than in air

will be increased to 80 in water than in air

In context with the industrial preparation of hydrogen from water gas \[{{(CO+H)}_{2}}\] which of the following is the correct statement?

\[CO\] and \[{{H}_{2}}\] are fractionally separated using differences in their densities

CO is removed by absorption in aqueous \[C{{u}_{2}}C{{l}_{2}}\] solution

\[{{H}_{2}}\] is removed through occlusion with Pd

CO is oxidised to \[C{{O}_{2}}\] with steam in the presence of a catalyst followed by absorption of \[C{{O}_{2}}\]in alkali

The hydride ion \[{{H}^{-}}\] is stronger base than its hydroxide ion\[O{{H}^{-}}\]. Which of the following reactions will occur if sodium hydride \[\left( NaH \right)\] is dissolved in water?

\[{{H}^{-}}~+{{H}_{2}}O\to \] No reaction

\[{{H}^{-}}(aq)+{{H}_{2}}O\to {{H}_{3}}{{O}^{-}}\]

\[{{H}^{-}}\left( aq \right)+{{H}_{2}}O\left( l \right)\to O{{H}^{-}}+{{H}_{2}}\]

\[{{H}^{-}}~+{{H}_{2}}O\to \] No reaction

Among \[Ca{{H}_{2}},N{{H}_{2}},NaH\] and \[{{B}_{2}}{{H}_{6}}\] which are covalent hydrides?

\[N{{H}_{3}}\] and \[{{B}_{2}}{{H}_{6}}\]

\[NaH\] and \[N{{\text{H}}_{3}}\]

\[Ca{{H}_{2}}\] and \[{{B}_{2}}{{H}_{6}}\]

Chemical A is used for water softening to remove temporary hardness. A reacts with sodium carbonate to generate caustic soda. When \[C{{O}_{2}}\] is bubbled through a solution of A, it turns cloudy. What is the chemical formula of A?

\[Ca{{\left( HC{{O}_{3}} \right)}_{2}}\]

1187 + Mcqs in Chemistry in NEET Page 4 McqOptions

151.	To get a n-type semiconductor, the impurity to be added to silicon should have which of the following number of valence electrons
A.	1
B.	2
C.	3
D.	5
Answer» E.

Discussion

152.	Which property of colloids is not dependent on the charge on colloidal particles?
A.	Coagulation
B.	Electrophoresis
C.	Electro-osmosis
D.	Tyndall effect
Answer» E.

Discussion

153.	How many cyclic structures are possible for \[{{C}_{4}}{{H}_{6}}\]?
A.	3
B.	5
C.	6
D.	4
Answer» C. 6

Discussion

154.	The oxidation number of Fe in \[N{{a}_{2}}[Fe{{(CN)}_{5}}NO]\]is
A.	+2
B.	+1
C.	+3
D.	-2
Answer» B. +1

Discussion

155.	Although, nitrogen does not adsorb on a surface at room temperature, it adsorbs on the surface at 83 K. Which one of the following statements is correct?
A.	At 83 K, there is formation of monolayer
B.	At 83 K, nitrogen is adsorbed as atoms
C.	At 83 K, nitrogen molecules are held by chemical bonds
D.	At 83 K, there is formation of multimolecular layers
Answer» E.

Discussion

156.	\[n(C{{F}_{2}}=C{{F}_{2}})\xrightarrow[{{(N{{H}_{4}})}_{2}}{{S}_{2}}{{O}_{8}}]{Benzoyl\,peroxide\,or}X\] Here, X is:
A.	RMMA
B.	PVC
C.	PAN
D.	None of these
Answer» E.

Discussion

157.	The most stable canonical structure among the given structure is:
A.	I
B.	II
C.	III
D.	all are equally stable
Answer» D. all are equally stable

Discussion

158.	The heat evolved in chemisorption lies in the range (in kJ/mol) of:
A.	80 to 240
B.	20 to 40
C.	40 to 80
D.	20 to 100
Answer» B. 20 to 40

Discussion

159.	The vapour pressure of a solution of the liquids A (\[P{}^\circ =80\] mm Hg and \[{{x}_{A}}=0.4\]) and B (\[P{}^\circ =120\] mm Hg and \[{{X}_{B}}=0.6\]) is found to be \[100mm\]Hg. It shows that the solution exhibits
A.	positive deviation from ideal behaviour
B.	negative deviation from ideal behaviour
C.	ideal behaviour
D.	positive deviation for lower cone. and negative for higher cone.
Answer» C. ideal behaviour

Discussion

160.	In the reaction \[3Mg+{{N}_{2}}\to M{{g}_{3}}{{N}_{2}}\]
A.	magnesium is reduced
B.	magnesium is oxidized
C.	nitrogen is oxidized
D.	None of these
Answer» C. nitrogen is oxidized

Discussion

161.	34 g of \[{{H}_{2}}{{O}_{2}}\] is present in 1120 mL of solution. This solution is called
A.	10 vol solution
B.	20 vol solution
C.	34 vol solution
D.	32 vol solution
Answer» B. 20 vol solution

Discussion

162.	Which of the following statements do not define the characteristic property of water "Water is a universal solvent"
A.	It can dissolve maximum number of compounds
B.	It has very low dielectric constant
C.	It has high liquid range
D.	None of these
Answer» C. It has high liquid range

Discussion

163.	Hydrogen peroxide in its reaction with \[Kl{{O}_{4}}\] and \[N{{H}_{2}}OH\] respectively, is acting as a
A.	Reducing agent, oxidising agent
B.	Reducing agent, reducing agent
C.	Oxidising agent, oxidising agent
D.	Oxidising agent, reducing agent
Answer» B. Reducing agent, reducing agent

Discussion

164.	The adsorption of hydrogen by metals is called
A.	Dehydrogenation
B.	Hydrogenation
C.	Occlusion
D.	Adsorption
Answer» D. Adsorption

Discussion

165.	When zeolite (hydrated sodium aluminium silicate) is treated with hard water, the sodium ions are exchanged with
A.	\[{{H}^{+}}\] ions
B.	\[C{{a}^{2+}}ions\]
C.	\[S{{O}_{4}}^{2-}\] ions
D.	\[O{{H}^{-}}\] ions
Answer» C. \[S{{O}_{4}}^{2-}\] ions

Discussion

166.	Which substance does not speed up decomposition of \[{{H}_{2}}{{O}_{2}}\]?
A.	Glycerol
B.	Pt
C.	Gold
D.	\[Mn{{O}_{2}}\]
Answer» B. Pt

Discussion

167.	The reaction of \[{{H}_{2}}{{O}_{2}}\] with sulphur is an example of........ reaction
A.	Addition
B.	Oxidation
C.	Reduction
D.	Redox
Answer» E.

Discussion

168.	An inorganic compound gives off \[{{O}_{2}}\] when heated, turns an acidic solution of KI violet and reduces acidified\[KMn{{O}_{4}}\]. The compound is
A.	\[S{{O}_{3}}\]
B.	\[KN{{O}_{3}}\]
C.	\[{{H}_{2}}{{O}_{2}}\]
D.	All of these
Answer» D. All of these

Discussion

169.	Hydrogen peroxide acts both as an oxidising and as a reducing agent depending upon the nature of the reacting species. In which of the following cases \[{{H}_{2}}{{O}_{2}}\] acts as a reducing agent in acid medium?
A.	\[MnO_{4}^{-}\]
B.	\[C{{r}_{2}}O_{7}^{2-}\]
C.	\[SO_{3}^{2-}\]
D.	KI
Answer» B. \[C{{r}_{2}}O_{7}^{2-}\]

Discussion

170.	Which statement is wrong?
A.	Ordinary hydrogen is an equilibrium mixture of ortho and para hydrogen
B.	In ortho hydrogen spin of two nuclei is in same direction
C.	Ortho and para forms do not resemble in their chemical properties
D.	In para hydrogen spin of two nuclei is in opposite direction.
Answer» D. In para hydrogen spin of two nuclei is in opposite direction.

Discussion

171.	Hydrogen molecules differs from chlorine molecule in the following respect
A.	Hydrogen molecule is non-polar but chlorine molecule is polar
B.	Hydrogen molecule is polar while chlorine molecule is non-polar
C.	Hydrogen molecule can form intermolecular hydrogen bonds but chlorine molecule does not
D.	Hydrogen molecule cannot participate in coordination bond formation but chlorine molecule can
Answer» E.

Discussion

172.	When a sample of hard water is passed through the layer of sodium zeolite resulting which of the following ions will not be present in the resulting sample of water obtained?
A.	\[M{{g}^{2+}}\] and \[C{{a}^{2+}}\]
B.	\[C{{a}^{2+}}\] and \[N{{a}^{+}}\]
C.	\[M{{g}^{2+}}\] and \[CO_{3}^{2-}\]
D.	\[CO_{3}^{2-}\] and \[C{{l}^{-}}\]
Answer» B. \[C{{a}^{2+}}\] and \[N{{a}^{+}}\]

Discussion

173.	Which of the following statements are correct? (i) Hydrogen peroxide is industrially prepared by the auto-oxidation of 2-alkyl anthraquinols (ii) One millilitre of 30% \[{{H}_{2}}{{O}_{2}}\] means that solution will give 100 V of oxygen at STP (iii) Dihedral angle of \[{{H}_{2}}{{O}_{2}}\] in gas phase is \[90.2{}^\circ \] and in solid phase dihedral angle is \[111.5{}^\circ \]
A.	(i), (ii) and (iii)
B.	(i) and (iii)
C.	(ii) and (iii)
D.	(i) and (ii)
Answer» E.

Discussion

174.	In which of the following reactions, \[{{H}_{2}}{{O}_{2}}\] is acting as a reducing agent
A.	\[{{H}_{2}}{{O}_{2}}+S{{O}_{2}}\to {{H}_{2}}S{{O}_{4}}\]
B.	\[2KI+{{H}_{2}}{{O}_{2}}\to 2KOH+{{I}_{2}}\]
C.	\[PbS+4{{H}_{2}}{{O}_{2}}\to PbS{{O}_{4}}+4{{H}_{2}}O\]
D.	\[A{{g}_{2}}O+{{H}_{2}}{{O}_{2}}\to 2Ag+{{H}_{2}}O+{{O}_{2}}\]
Answer» E.

Discussion

175.	Water is:
A.	more polar than \[{{H}_{2}}S\]
B.	more or less identical in polarity with \[{{H}_{2}}S\]
C.	less polar than \[{{H}_{2}}S\]
D.	None of these
Answer» B. more or less identical in polarity with \[{{H}_{2}}S\]

Discussion

176.	Consider the following statements:1.Atomic hydrogen is obtained by passing hydrogen through an electric arc.2.Hydrogen gas will not reduce heated aluminium oxide.3.Finely divided palladium adsorbs large volume of hydrogen gas4.Pure nascent hydrogen is best obtained by reacting Na with \[{{C}_{2}}{{H}_{5}}OH\] Which of the above statements is/are correct?
A.	1 alone
B.	2 alone
C.	1, 2 and 3
D.	2, 3 and 4
Answer» D. 2, 3 and 4

Discussion

177.	In Bosch's process, which gas is utilised for the production of hydrogen gas?
A.	Producer gas
B.	Water gas
C.	Coal gas
D.	None of these
Answer» C. Coal gas

Discussion

178.	Hydrogen at room temperature contains:
A.	25% ortho + 75% para
B.	25% para + 75% ortho
C.	50% ortho + 50% para
D.	60% ortho + 34% para
Answer» C. 50% ortho + 50% para

Discussion

179.	When same amount of zinc is treated separately with excess of sulphuric acid and excess of sodium hydroxide solution the ratio of volumes of hydrogen evolved is
A.	1:1
B.	1:2
C.	2:1
D.	0.377777777777778
Answer» B. 1:2

Discussion

180.	When two ice cubes are pressed over each other, they unite to form one cube. Which of the following forces is responsible to hold them together?
A.	Hydrogen bond formation
B.	van der Waals forces
C.	Covalent attraction
D.	Ionic interaction
Answer» B. van der Waals forces

Discussion

181.	The amount of \[{{H}_{2}}{{\text{O}}_{2}}\] present in 1 litre of \[1.5N{{H}_{2}}{{\text{O}}_{2}}\] solution, is:
A.	25.5 g
B.	3.0 g
C.	8.0 g
D.	2.5 g
Answer» B. 3.0 g

Discussion

182.	Which of the following terms is not correct for hydrogen?
A.	Its molecule is diatomic
B.	It exists both as \[{{H}^{+}}\] and \[{{H}^{-}}\] in different chemical compounds
C.	It is the only species which has no neutrons in the nucleus
D.	Heavy water is unstable because hydrogen is substituted by its isotope deuterium
Answer» E.

Discussion

183.	Hard water is not fit for washing clothes because
A.	it contains \[N{{a}_{2}}S{{O}_{4}}\] and \[KCl\]
B.	It gives precipitate
C.	it contains impurities
D.	it is acidic in nature
Answer» C. it contains impurities

Discussion

184.	2 g of aluminium is treated separately with excess of dilute \[{{H}_{2}}S{{O}_{4}}\] and excess of \[NaOH.\] The ratio of the volumes of hydrogen evolved is
A.	2:3
B.	1:1
C.	2:1
D.	0.0430555555555556
Answer» C. 2:1

Discussion

185.	The numbers of protons, electrons and neutrons in a molecule of heavy water are respectively:
A.	8, 10, 11
B.	10, 10, 10
C.	10, 11, 10
D.	11, 10, 10
Answer» C. 10, 11, 10

Discussion

186.	Barium peroxide reacts with phosphoric acid to produce barium phosphate along with
A.	water
B.	hydrogen peroxide
C.	dioxygen
D.	phosphine
Answer» C. dioxygen

Discussion

187.	The normality and volume strength of a solution made by mixing 1.0 L each of 5.6 volume and 11.2 volume \[{{H}_{2}}{{O}_{2}}\] solution are:
A.	1 N, 5.6 vol
B.	1.5 N, 5.6 vol
C.	1.5 N, 8.4 vol
D.	1 N, 8.4 vol
Answer» D. 1 N, 8.4 vol

Discussion

188.	The purity of \[{{H}_{2}}{{O}_{2}}\] in a given sample is 85%. Calculate the weight of impure sample of \[{{H}_{2}}{{O}_{2}}\] which requires 10 mL of \[M/5\text{ }KMn{{O}_{4}}\] solution in titration in acidic medium
A.	2 g
B.	0.2 g
C.	0.17 g
D.	0.15 g
Answer» C. 0.17 g

Discussion

189.	Polyphosphates are used as water softening agents because they
A.	form soluble complexes with anionic species
B.	precipitate anionic species
C.	form soluble complexes with cationic species
D.	precipitate cationic species
Answer» D. precipitate cationic species

Discussion

190.	100 mL of 0.01 \[M\,KMn{{O}_{4}}\] oxidises 100 mL \[{{H}_{2}}{{O}_{2}}\] in acidic medium. Volume of the same\[KMn{{O}_{4}}\] required in alkaline medium to oxidise 100 mL of the same \[{{H}_{2}}{{O}_{2}}\] will be (\[MnO_{4}^{-}\] changes to \[M{{n}^{2+}}\] in acidic medium and to \[Mn{{O}_{2}}\] in alkaline medium)
A.	\[\frac{100}{3}mL\]
B.	\[\frac{500}{3}mL\]
C.	\[\frac{300}{5}mL\]
D.	None
Answer» C. \[\frac{300}{5}mL\]

Discussion

191.	Which of the following is wrong about \[{{H}_{2}}{{O}_{2}}\] It is used
A.	as an aerating agent in production of sponge rubber
B.	as an antichlor
C.	for restoring white colour of blackened lead painting
D.	None of these
Answer» E.

Discussion

192.	The dielectric constant of \[{{H}_{2}}{{O}_{2}}\] is 80. The electrostatic force of attraction between \[N{{a}^{+}}\] and \[C{{l}^{-}}\] will be
A.	reduced to 1 /40 in water than in air
B.	reduced to 1/80 in water than in air
C.	will be increased to 80 in water than in air
D.	will remain unchanged.
Answer» C. will be increased to 80 in water than in air

Discussion

193.	In context with the industrial preparation of hydrogen from water gas \[{{(CO+H)}_{2}}\] which of the following is the correct statement?
A.	\[CO\] and \[{{H}_{2}}\] are fractionally separated using differences in their densities
B.	CO is removed by absorption in aqueous \[C{{u}_{2}}C{{l}_{2}}\] solution
C.	\[{{H}_{2}}\] is removed through occlusion with Pd
D.	CO is oxidised to \[C{{O}_{2}}\] with steam in the presence of a catalyst followed by absorption of \[C{{O}_{2}}\]in alkali
Answer» E.

Discussion

194.	What is formed when calcium carbide reacts with heavy water?
A.	\[{{C}_{2}}{{D}_{2}}\]
B.	\[Ca{{D}_{2}}\]
C.	\[C{{a}_{2}}{{D}_{2}}O\]
D.	\[C{{D}_{2}}\]
Answer» B. \[Ca{{D}_{2}}\]

Discussion

195.	The alum used for purifying water is
A.	Ferric alum
B.	Chrome alum
C.	Potash alum
D.	Ammonium alum
Answer» D. Ammonium alum

Discussion

196.	The hydride ion \[{{H}^{-}}\] is stronger base than its hydroxide ion\[O{{H}^{-}}\]. Which of the following reactions will occur if sodium hydride \[\left( NaH \right)\] is dissolved in water?
A.	\[{{H}^{-}}(aq)+{{H}_{2}}O\to {{H}_{3}}{{O}^{-}}\]
B.	\[{{H}^{-}}\left( aq \right)+{{H}_{2}}O\left( l \right)\to O{{H}^{-}}+{{H}_{2}}\]
C.	\[{{H}^{-}}~+{{H}_{2}}O\to \] No reaction
D.	None of these
Answer» C. \[{{H}^{-}}~+{{H}_{2}}O\to \] No reaction

Discussion

197.	Which of the following metal evolves hydrogen on reaction with cold dilute\[HN{{O}_{3}}\]?
A.	Mg
B.	Al
C.	Fe
D.	Cu
Answer» B. Al

Discussion

198.	Among \[Ca{{H}_{2}},N{{H}_{2}},NaH\] and \[{{B}_{2}}{{H}_{6}}\] which are covalent hydrides?
A.	\[N{{H}_{3}}\] and \[{{B}_{2}}{{H}_{6}}\]
B.	\[NaH\] and \[Ca{{H}_{2}}\]
C.	\[NaH\] and \[N{{\text{H}}_{3}}\]
D.	\[Ca{{H}_{2}}\] and \[{{B}_{2}}{{H}_{6}}\]
Answer» B. \[NaH\] and \[Ca{{H}_{2}}\]

Discussion

199.	Permanent hardness in water cannot be cured by:
A.	Treatment with washing soda
B.	Boiling
C.	Calgon's method
D.	Ion exchange method
Answer» C. Calgon's method

Discussion

200.	Chemical A is used for water softening to remove temporary hardness. A reacts with sodium carbonate to generate caustic soda. When \[C{{O}_{2}}\] is bubbled through a solution of A, it turns cloudy. What is the chemical formula of A?
A.	\[CaC{{O}_{3}}\]
B.	\[CaO\]
C.	\[Ca{{(OH)}_{2}}\]
D.	\[Ca{{\left( HC{{O}_{3}} \right)}_{2}}\]
Answer» D. \[Ca{{\left( HC{{O}_{3}} \right)}_{2}}\]

Discussion

Explore topic-wise MCQs in NEET.

To get a n-type semiconductor, the impurity to be added to silicon should have which of the following number of valence electrons

Which property of colloids is not dependent on the charge on colloidal particles?

How many cyclic structures are possible for \[{{C}_{4}}{{H}_{6}}\]?

The oxidation number of Fe in \[N{{a}_{2}}[Fe{{(CN)}_{5}}NO]\]is

Although, nitrogen does not adsorb on a surface at room temperature, it adsorbs on the surface at 83 K. Which one of the following statements is correct?

\[n(C{{F}_{2}}=C{{F}_{2}})\xrightarrow[{{(N{{H}_{4}})}_{2}}{{S}_{2}}{{O}_{8}}]{Benzoyl\,peroxide\,or}X\] Here, X is:

The most stable canonical structure among the given structure is:

The heat evolved in chemisorption lies in the range (in kJ/mol) of:

The vapour pressure of a solution of the liquids A (\[P{}^\circ =80\] mm Hg and \[{{x}_{A}}=0.4\]) and B (\[P{}^\circ =120\] mm Hg and \[{{X}_{B}}=0.6\]) is found to be \[100mm\]Hg. It shows that the solution exhibits

In the reaction \[3Mg+{{N}_{2}}\to M{{g}_{3}}{{N}_{2}}\]

34 g of \[{{H}_{2}}{{O}_{2}}\] is present in 1120 mL of solution. This solution is called

Which of the following statements do not define the characteristic property of water "Water is a universal solvent"

Hydrogen peroxide in its reaction with \[Kl{{O}_{4}}\] and \[N{{H}_{2}}OH\] respectively, is acting as a

The adsorption of hydrogen by metals is called

When zeolite (hydrated sodium aluminium silicate) is treated with hard water, the sodium ions are exchanged with

Which substance does not speed up decomposition of \[{{H}_{2}}{{O}_{2}}\]?

The reaction of \[{{H}_{2}}{{O}_{2}}\] with sulphur is an example of........ reaction

An inorganic compound gives off \[{{O}_{2}}\] when heated, turns an acidic solution of KI violet and reduces acidified\[KMn{{O}_{4}}\]. The compound is

Hydrogen peroxide acts both as an oxidising and as a reducing agent depending upon the nature of the reacting species. In which of the following cases \[{{H}_{2}}{{O}_{2}}\] acts as a reducing agent in acid medium?

Which statement is wrong?

Hydrogen molecules differs from chlorine molecule in the following respect

When a sample of hard water is passed through the layer of sodium zeolite resulting which of the following ions will not be present in the resulting sample of water obtained?

In which of the following reactions, \[{{H}_{2}}{{O}_{2}}\] is acting as a reducing agent

Water is:

In Bosch's process, which gas is utilised for the production of hydrogen gas?

Hydrogen at room temperature contains:

When same amount of zinc is treated separately with excess of sulphuric acid and excess of sodium hydroxide solution the ratio of volumes of hydrogen evolved is

When two ice cubes are pressed over each other, they unite to form one cube. Which of the following forces is responsible to hold them together?

The amount of \[{{H}_{2}}{{\text{O}}_{2}}\] present in 1 litre of \[1.5N{{H}_{2}}{{\text{O}}_{2}}\] solution, is:

Which of the following terms is not correct for hydrogen?

Hard water is not fit for washing clothes because

2 g of aluminium is treated separately with excess of dilute \[{{H}_{2}}S{{O}_{4}}\] and excess of \[NaOH.\] The ratio of the volumes of hydrogen evolved is

The numbers of protons, electrons and neutrons in a molecule of heavy water are respectively:

Barium peroxide reacts with phosphoric acid to produce barium phosphate along with

The normality and volume strength of a solution made by mixing 1.0 L each of 5.6 volume and 11.2 volume \[{{H}_{2}}{{O}_{2}}\] solution are:

The purity of \[{{H}_{2}}{{O}_{2}}\] in a given sample is 85%. Calculate the weight of impure sample of \[{{H}_{2}}{{O}_{2}}\] which requires 10 mL of \[M/5\text{ }KMn{{O}_{4}}\] solution in titration in acidic medium

Polyphosphates are used as water softening agents because they

Which of the following is wrong about \[{{H}_{2}}{{O}_{2}}\] It is used

The dielectric constant of \[{{H}_{2}}{{O}_{2}}\] is 80. The electrostatic force of attraction between \[N{{a}^{+}}\] and \[C{{l}^{-}}\] will be

In context with the industrial preparation of hydrogen from water gas \[{{(CO+H)}_{2}}\] which of the following is the correct statement?

What is formed when calcium carbide reacts with heavy water?

The alum used for purifying water is

The hydride ion \[{{H}^{-}}\] is stronger base than its hydroxide ion\[O{{H}^{-}}\]. Which of the following reactions will occur if sodium hydride \[\left( NaH \right)\] is dissolved in water?

Which of the following metal evolves hydrogen on reaction with cold dilute\[HN{{O}_{3}}\]?

Among \[Ca{{H}_{2}},N{{H}_{2}},NaH\] and \[{{B}_{2}}{{H}_{6}}\] which are covalent hydrides?

Permanent hardness in water cannot be cured by:

Chemical A is used for water softening to remove temporary hardness. A reacts with sodium carbonate to generate caustic soda. When \[C{{O}_{2}}\] is bubbled through a solution of A, it turns cloudy. What is the chemical formula of A?