Which one is not a isotope of hydrogen ?
The pair that yields the same gaseous product on reaction with water
A commercial sample of hydrogen peroxide is labelled as 10 volume. Its percentage strength is nearly
The property of Hydrogen which resembles that of halogens is
Alkali metal hydrides react with water to give
20 volumes H 2 O 2 solution has a strength of about
Which of the following groups of ions makes the water hard ?
The volume strength of 1.5 N H 2 O 2 solution is
Identify the correct statement from the following.
Correct order of boiling point is
Which of the following hydrogen compounds is most ionic ?
In all its properties, hydrogen resembles
Pick out the correct statement
Plumbosolvency is a health hazard in the transportation of
Which of the following is incorrect for hydrogen?
Which of the following is not an isotope of hydrogen?
The principal element in the atmospheres of Sun and the giant planets Jupiter and Saturn is :
The half life period of H 1 3 is
The number of neutrons present in the nuclei of H 1 1 , H 1 2 and H 1 3 respectively are
For simplicity, sodium aluminium silicate is written as
For obtaining 100% pure H 2 O 2 , the last traces of water are removed by
H 2 gas was used with LPG for running four wheelers for the first time in the year
Which of the following statements about hydrogen is incorrect?
The number of hydrogen bonded water molecule(s) associated with CuSO 4 . 5 H 2 O is
Na 2 CO 3 + H 2 O 2 Na 2 O 2 + H 2 O + CO 2 . In this reaction H 2 O 2 behaves like
Hydrogen peroxide has some unique properties and structure. Regarding H 2 O 2 , correct statement is
All the following can give hydrogen peroxide when they react with water except
Freezing point of heavy water is
Among the radioactive elements tritium is used as better tracer because
Hydrogen gas is prepared in the laboratory by
The correct statement about the following is
Hydrogen is not obtained when zinc reacts with
The property of hydrogen which distinguishes it from other alkali metals is
The value of …….. is less for D 2 O compared to that of H 2 O.
The O–H bond energy in water when compared to O–D bond energy in heavy water is
Temporary hardness of water can be removed A) By Clark’s process B) By Boiling water
In which of the following reactions, H 2 O 2 acts as a reducing reagent ?
The method of storing of H 2 O 2 is
The dipole moment of H 2 O 2 is 2.1D. This indicates the structure of H 2 O 2 is
Statement I: H 2 O 2 reduces Cl 2 to HCl Statement II : H 2 O 2 is also called antichlor
The common name of sodium hexa meta phosphate (Na 6 P 6 O 18 ) is
Permanent hardness of water arises due to the presence of
Which of the following is not true
Dihedral angle in gaseous hydrogen peroxide molecule is
In H 2 O 2 molecule, the angle in gas phase is
Negative catalyst for the decomposition of H 2 O 2 is
Polyphosphates like calgon are used as water softening agents because they
Which one of the following statements about a zeolite is false
In solid ice, oxygen atom is surrounded
Which of the following reactions requires high temperature and catalyst?
The ionisation energy of hydrogen is
The maximum number of possible hydrogen molecules formed from its isotopes is
In naturally available hydrogen, the percentage of tritium is
(solution) Terrestial hydrogen contains 0.0156% of deuterium mostly in the form of
In which of the following hydride law of constant composition does not hold good.
What is the volume strength of 200 ml of aqueous H 2 O 2 solution containing 6.8 gm of H 2 O 2
Equivalent weight of H 2 O 2 as oxidizing agent is ……. and as a reducing agent is …….
The hydride that is NOT electron deficient is
Angle between two OH groups of solid hydrogen peroxide is
In the reaction, H 2 S + H 2 O 2 → S + 2H 2 O
The following reacts with water to give H 2 O 2
When PbS is oxidised by H 2 O 2 the increase in oxidation state of sulphur is
Which of the following pairs will not produce dihydrogen gas ?
Which element forms maximum compound in chemistry ?
One of the following is an incorrect statement. Point out the incorect one.
Hydrogen has three isotopes, the number of possible diatomic molecules will be
Hydrogen does not combine with
Among CaH 2 , NH 3 , NaH and B 2 H 6 , which are covalent hydrides ?
Polyphosphates are used as water softening agents because
Temporary hardness may be removed from water by adding
Deuterium differs from hydrogen in
D 2 O is preferred to H 2 O , as a moderator, in nuclear reactors because
Hydrogen can behave as a metal
Hardness of water is due to presence of salts of
The oxidation states exhibited by hydrogen in its various compuonds are
At its melting point ice is lighter than water because
Saline hydrides react explosively with water, such fires can be extinguished by
Decomposition of H 2 O 2 is accelerated by
Which statement about zeolite is false ?
H 2 O 2 is manufactured these days
Alkali metals react with cold water and alkaline earth metals with boiling water to displace
The terrestrial hydrogen contains 0.0156% of deuterium, mostly in the form of
H 1 3 or β – emitter which of the following is the correct nuclear disintegration reaction for H 1 3
What name is given to approximate 1 : 1 mixture of CO and H 2 gases?
Supply the missing term in the reaction Zn + . ….. Na 2 ZnO 2 + H 2
Which of the following is incorrect for H 2 , D 2 and T 2 ?
Approximately 77% of industrial dihydrogen is produced from
In bulk of water and in ice one water molecule forms …………. hydrogen bonds.
Which of the following is not a redox reaction?
Which of the following is correct for H 2 O 2 ?
The number of H 2 O molecules coordinated and hydrogen bonded in CuSO 4 .5H 2 O, respectively are
After the exhaust of zeolite in ion-exchange method, it is regenerated by using
Which of the following shows oxidising nature of H 2 O 2 ?
Which of the following compounds is used for water softening?
Permanent hardness of water can be removed by adding
The dihedral angle in gaseous H 2 O 2 is
Oxidation state of hydrogen is negative in
CH 4 g + H 2 O g 1273 K Ni X ; ‘X’ is
Regarding Hydrogen peroxide, false statement is
LiH , NaH , KH , BeH 2 , CaH 2 . How many are predominantly covalent
The reaction of aqueous K M n O 4 with H 2 O 2 in acidic conditions gives
A process is non-spontaneous at all temperatures when
The method used to remove temporary hardness of water is
Which of the following can act like a negative catalyst in the decmposition of Hydrogen peroxide
Number of hydrogen bonded water molecules in blue vitriol
MnO 4 − H + H 2 O 2 A OH − H 2 O 2 B . In this process, B and A respectively are
Maximum number of H-bonds formed by a water molecule is/are
In Clarke’s process, the salts responsible for hardness get precipitated as
Correct statement among the following is
Interstitial water molecules are present in
20 volume H 2 O 2 is not equal to
Structure of hydrogen peroxide molecule is
Molarity of 90 volume hydrogen peroxide solution is
Decomposition of hydrogen peroxide can be accelerated by
The high density of water compared to ice is due to
The O-H bond length in H 2 O is xAº. The O-H bond length in H 2 O 2 is
Hydrogen has similarity with alkali metals in
The element which has no suitable position in the periodic table is
Hydrogen mainly resembles alkali metals in the property
Hydrogen mainly resembles halogens in the property
Incorrect statement among the following is
The total number of fundamental particles in normal hydrogen molecule
The radioactive isotope of hydrogen is
, and will have the same , and differ in their
Most abundant element in the universe is
Ionisation potential of hydrogen is
In which of the following conversion iron chromate catalyst is used.
The reaction which does not liberate hydrogen is
Number of types of hydrides known is
Electrolysis of molten saline hydride generally gives
Hydrogen will not reduce heated
Purest form of hydrogen is obtained by
The reaction involved during the removal of temporary hardness of water is
Deionised water is prepared by the following method
Percentage of water present in oceans
Deutero methane is obtained by the deuterolysis of
In which of the following reactions, H 2 O 2 acts as oxidising agent ?
The weight of H 2 O 2 present in 10 ml 80Vol. H 2 O 2 solution is
When 20 ml of 2.5M H 2 O 2 aqueous soultion is decomposed the S.T.P. volume of oxygen obtained is
The volume of 40 vol. H 2 O 2 solution required to prepare 2L. of O 2 at STP is
The substance which can not be used for preparing H 2 O 2 solution is
Which of the following statements is incorrect ?
During decomposition of H 2 O 2 , it undergoes
Hydrogen forms a stoichiometric hydride with which of the following metal
Volume strength of perhydrol is
The following reaction shows the reducing action of H 2 O 2
Only one element of forms hydride
Hydrogen resembles alkali metals in many aspects but differs in
Which one of the following reactions represents the oxidizing property of H 2 O 2 ?
The quantity of charge liberated during the formation of 3.6 grams of water in hydrogen fuel cell is
The approximate mass of H 2 O 2 present in 200mL of 100 volume H 2 O 2 solution is
How many hydrogen bonded water molecules are associated with FeSO 4 .7H 2 O ?
Which of the following reactions increases production of dihydrogen from synthesis gas?
In Clark's method, the substance used for the removal of temporary hardness of water is
The group responsible for the removal of cations in ion exchange resin is
If excess of Ca(OH) 2 is added to hard water in Clark's method
Exhausted cation exchange resin is regenerated by using solution of moderately concentrated
Which of the following methods does not remove hardness of water ?
The nature of water sample coming out through cation exchanger is
Hardness of water is due to the presence of
In atomic reactor heavy water is used as
The compound formed when heavy water reacts with CaC 2 is
Boiling point of heavy water is
The pH of D 2 O and H 2 O at 298K is
Volume strength of 10%(w/v) H 2 O 2 is approximately
An antiseptic sold in the market
Hydrolysis of one mole of peroxodisulphuric acid produces
Delicate materials like silk, wool and ivory are bleached by
H 2 O 2 + Na 2 CO 3 → Na 2 O 2 + H 2 O + CO 2 . In this reaction H 2 O 2 acts like
Which one of the following reactions does not form gaseous product ?
In which reaction, hydrogen peroxide neither acts as an oxidising agent nor as a reducing agent ?
Ortho and para hydrogen differ
A mixture of hydrazine and H 2 O 2 is used as
At room temperature the ratio of ortho and para hydrogens in dihydrogen is
Fentons reagent among the following is
In transforming 0.01mole of PbS to PbSO 4 the volume of ‘10volume’ H 2 O 2 required will be
The number of moles of D 2 O required in the complete exchange reaction with one mole of NH 4 Cl are
Which of the following disproportionates when treated with water ?
In the calgon process of softening of water, which of the following is used?
Non-stoichiometric hydrides are formed by
Bond angles H-O-H and H-O-O- in water and H 2 O 2 in vapour state respectively are
Maximum number of hydrogen bonds that one water molecule is capable of forming is
Which of the following statement is false about hardness of water
The property of heavy water which is lesser than water is
All the following can liberate hydrogen with alkali except
Hydrogen is not obtained when zinc reacts with
Ortho-hydrogen and para-hydrogne resemble in which of the following property
Which of the following produces hydrolith with dihydrogen ?
Hydrogen accepts an electron to form inert gas configuration. In this it resembles
The property of hydrogen which distinguishes it from alkali metals is
The sum of proton, electrons and neutrons in the lightest isotope of hydrogen is
The sum of protons, electrons and neutrons in the heaviest isotope of hydrogen is
Hydrogen directly combines with
Which of the following statements concerning protium, deuterium and tritium is not true ?
Abundance of H 2 in the earth’s atmosphere is very small. This is because
The ratio C p / C v for H 2 is
Which of the following could act as a propellant for rockets ?
Hydrogen acts as an oxidising agent in the reaction with
Which of the following reaction produces hydrogen ?
Hydrogen is evolved the action of cold dilute HNO 3 on
In Bosch’s process, which gas is utilised for the production of hydrogen gas
In which of the following compounds does hydrogen have an oxidation state of – 1 ?
Which of the following explanation is best for not placing hydrogen with alkali metals or halogen
Which position for hydrogen explain all its properties ?
Hydrogen can be produced by heating
Hydrogen combines with other elements by
Hydrogen readily combines with non-metals and thus it shows its
The metal which displace hydrogen from a boiling caustic soda soltuion is
Metal hydride on treatment with water gives
The radioactive isotopes of hydrogen is
Which of the following pairs of substances on reaction will not evolve H 2 gas ?
Which of the following metals adsorbs hydrogen ?
Hydrogen resembles in many of its properties
Very pure hydrogen (99.9%) can be made by which of the following processes ?
Which of the following hydrides is electron deficient ?
Hydrogen from HCl can be prepared by
Action of water or dilute mineral acids on metal can give
Which pair does not show hydrogen isotopes ?
Which of the following has the highest proton affinity ?
Ortho and para hydrogen differ in
Hydrogen gas is not liberated when the following metal is added to dil. HCl
Hydrogen acts as an oxidizing agent in its reaction with
Out of the following metals which will give H 2 on reaction with NaOH I: Zn, II: Mg, III: Al, IV: Be
Which of the following acid is formed when SiF 4 reacts with water ?
Which of the following pairs of molecules have practically the same mass ?
Action of water or dilute mineral acids on metals can give
The critical temperature of water is higher than that of O 2 because H 2 O molecule has
Deuteroammonia ND 3 can be prepared
The bond angle and dipole moment of water respectively are
Which is true statement about D 2 O and H 2 O ?
Temporary hardness may be removed from water by adding
Which of the following pair of ions makes the water hard ?
Pure water can be obtained from sea water by
Which will produce hard water ?
Which one of the following reactions represents water-gas shift reaction ?
The alum used for purifying water is
A variety of water which contains soluble salts of Ca and Mg is known as
Metal which does not react with cold water but evolves H 2 with steam is
Temporary hardness of water is due to the presence of
Which of the following is not true ?
The reagent commonly used to determine hardness of water titrimetrically is
Which of the following will cause softening of hard water ?
Select the correct statement for heavy water.
Which one of the following removes temporary hardness of water ?
Which of the following is not true ?
Which of the following is not a hard water ?
Lead pipes are not used for carrying drinking water because
Heavy water is used in nuclear reactors as
Water is said to be permanently hard when it contains
The molarity of pure water at 4 0 C is
When temporary hard water containing Mg HCO 3 2 is boiled, the ppt. formed is of
Permanent hardness due to Mg 2 + ions is best removed by
Which of the following is correct about heavy water ?
Which of the following is used as a moderator in nuclear reactors ?
Hardness producing salt, whose solubility in water decreases with rise of temperature is
Molecular weight of heavy water is
Of the two solvent H 2 O and D 2 O , NaCl dissolves
On shaking H 2 O 2 with acidified potassium dichromate and ether, ethanal layer becomes
The correct stability order of ionic hydride is
The species that does not contain peroxide ion is
Which of the following can effectively remove all types of hardness of water ?
An oxide which gives H 2 O 2 on treatment with dilute acid is
Which of the following metal will not reduce H 2 O ?
Water obtained by purification with organic ion exchange resins is
In which of the following reactions, H 2 O 2 acts as a reducing agent
Point out the incorrect statement
H 2 O 2 acts as an oxidising agent in
The dihedral angle in gaseous H 2 O 2 is
HCl is added to following oxides. Which one would give H 2 O 2 ?
The dihedral angle in gaseous H 2 O 2 is
H 2 O 2 used in rockets has the concentration
Which substance cannot be reduced by H 2 O 2
The volume of oxygen liberated from 0.68 g of H 2 O 2 is
Which of the following statements about H 2 O 2 is not true ?
The amount of H 2 O 2 present in 1 L of 1.5 N H 2 O 2 solution is
Equivalent weight of H 2 O 2 as reductant is
The H-O-O bond angle is H 2 O 2 is
A dilute solution of H 2 O 2 is labelled as 20 volume. Its percentage strength is
Which substance does not speed up decomposition of H 2 O 2 ?
The decomposition of H 2 O 2 can be checked by the addition of
A dilute solution of H 2 O 2 is labelled as 20 volume. Its percentage strength is
Hydrogen peroxide is now generally prepared on industrial scale by the
The volume of oxygen liberated from 15 ml of 20 volume H 2 O 2 is
The reaction of H 2 S + H 2 O 2 S + 2 H 2 O manifests
The oxide that gives hydrogen peroxide H 2 O 2 on the treatment with a dilute acid H 2 SO 4 is
H 2 O 2 is always stored in black bottles because
There is a sample of 10 volume of hydrogen peroxide solution. Calculate its strength.
In which of the following reaction hydrogen peroxide is a reducing agent
Blackened oil painting can be restored into original form by the action of
Commercial 11.2 volume H 2 O 2 solution has a molarity of
Which of the following undergoes reduction with H 2 O 2 in an alkaline medium ?
In the reaction, H 2 S + H 2 O 2 S + 2 H 2 O
Statement 1 : H 2 gas is liberated at anode because. Statement 2 : Sodium hydride contains H – ion.
Hydrogen is evolved by the action of cold dil. HNO 3 on
One mole of calcium phosphide on reaction with excess water gives
Out of the two allotropic forms of dihydrogen, the form with lesser molecular energy is
Hydrogen can be fuse to form helium at
In the reaction, 2FeSO 4 + H 2 SO 4 + H 2 O 2 Fe 2 SO 4 3 + 2 H 2 O The oxidizing agent is
H 2 O 2 can be obtained when following reacts with H 2 SO 4 except with
In alkaline medium, H 2 O 2 reacts with Fe 3 + and Mn 2 + respectively to give
H 2 O 2 H 2 O + O 2 This represents
The O – O – H bond angle in H 2 O 2 is
When H 2 O 2 is oxidised, the product is
Which of the following is correct for hydrogen ?
which of the following elements has simplest atomic structure?
Which of the following elements consists of atom with no neutron in the nucleus?
The most abundant element in the universe (about 70% of the total mass of the universe) is
Hydrogen does not show metallic character because of
Which of the following is the radioactive isotope of hydrogen?
H 1 1 , H 1 2 and H 1 3 differ in number of
The relative percentage abundance of H 1 1 , H 1 2 and H 1 3 , respectively is
Which of the following are usually used for the preparation of H 2 gas in laboratory?
What type of redox reaction is Zn + 2 H + Zn 2 + + H 2 ?
H 2 gas can be prepared by reacting steam H 2 O g with
H 2 gas is relatively inert at room temperature due to
H 2 gas can be converted to H 1 s 1 atoms by
Covalent or molecular hydrides are classified in ……………. types.
Which of the following is likely to form metallic or non-stoichiometric hydride?
Hydrides of which elements can form hydrogen bond between similar molecules?
Very high adsorption of hydrogen on some metals like Pt, Ni, Pd, etc., is used for
The percentage of water in human body and many plants is respectively
The unusual properties of water in the condensed phase (liquid and solid) are due to:
Which of LiH, BeH 2 , and MgH 2 have polymeric structure through hydrogen-bridge bond ?
The number of H 2 O molecules directly joined with Ba 2+ in BaCl 2 2H 2 O is :
Temporary hardness of water can be removed by
The very first method of removing hardness of water used
The empirical formula of permutit or zeolite used in ion-exchange method is
Which of the following is the industrial method for the preparation of H 2 O 2 ?
Which of the following is not correct for H 2 O 2 ?
Which of the following is the correct method of preparation of D 2 O 2 in the laboratory ?
One gram of which of the following releases the maximum energy?
For the storage of a small quantity of hydrogen, the tank is made from the alloy
Hydrogen economy means use of H 2 (g) or H 2 (l) as fuel. The advantage of hydrogen economy is
Why does H + ion always get associated with other atoms or molecules?
Which of the following hydrides is electron-precise hydride?
The oxide that gives H 2 O 2 on treatment with dilute H 2 SO 4 is
Which of the following reactions increases production of dihydrogen from synthesis gas?
Hydrogen peroxide is obtained by the electrolysis of ……….
Which of the following ions will cause hardness in water sample?
Only one element of ………….. forms hydride.
Elements of which of the following group(s) of periodic table do not form hydrides?
Excess of NaOH reacts with Zn to form
100 cm 3 of a given sample of H 2 O 2 , gives 1000 cm 3 of O 2 at STP. The given sample is
In solid ice, oxygen atom is surrounded
When CO 2 is bubbled through a solution/suspension of barium peroxide in water
A dilute solution of H 2 O 2 is labelled as 10 volume. Its strength in g L -1 is
Permanent hardness of water can be removed by adding
When sodium peroxide is treated with dilute sulphuric acid, we get ……….
Oxidation of 2-ethylanthraquinol produces H 2 O 2 and …………
Strength of H 2 O 2 is labeled as 10 V. Its percentage strength is nearly
Non-stoichiometric hydrides are formed by
In industry H 2 O 2 is commonly prepared by
Which of the following statements about hydrogen is incorrect ?
At room temperature parahydrogen is
Life time of atomic hydrogen is
The reagent not used for softening the temporary hardness of water is
Ca OH 2 excess CO 2 A . Correct statement about ‘A’ is
Which of the following is not correct about hydrogen peroxide
What is produced when CH 4 reacts with steam at 1273 K in the presence of Ni?
The dihedral angle in solid hydrogen peroxide molecule is nearly
Which one of the following create great and high performance in a missile?
Volume strength and normality of perhydrol are respectively
Which of the following conducts electricity at room temperature?
Identify the correct statement
Element (X) does not form Hydride when reacts with dihydrogen. Atomic number of element (X) is
The number of proton and electron in atomic form of hydrogen respectively are
Hydrogen does not possess the metallic character under normal conditions because
How many neutrons are present in protium, deuterium and tritium respectively?
Which of the following method is used to obtain high purity (> 99.95)% dihydrogen?
Hydrogen is much less abundant in the earth’s atmosphere because of its
O 2 − + H 2 O Predict the outcome of the reaction
In which of these does H 2 O 2 acts as oxidizing agent ?
Hydrogen resembles halogens in all the following properties except
Volume strength of H 2 O 2 solution is 56 volume. Normality of this solution is equal to
Which of the following is not correct about hydrogen peroxide
The dihedral angle in gaseous hydrogen peroxide molecule is nearly
Decomposition of hydrogen peroxide can be accelerated in presence of
Regarding hydrogen and its isotopes, incorrect statement is