NEW
Font size
WorksheetsHYDROGEN
Total questions: 30
Worksheet time: 28mins
In the laboratoryH2O2 is prepared by the action of
cold dilute H2SO4 on hydrated BaO2
dil.HCl on MnO2
cold H2SO4 on MnO2
aqueous alkali on Na2O2
The bleaching properties of H2O2 are due to its
reducing properties
oxidising properties
unstable nature
acidic nature
Which of the following is not a water softener
Na2CO3
Na2SO4
Calgon
Permutit
What is False about ice-
Its density is more than water
A water molecule form 4 H-Bond
It is a thermal insulator
Its density is less than water
Amongst H2O,H2S,H2Se and H2Te, the one with the highest boiling point is -
H2O, because of hydrogen bonding
H2Te, because of higher molecular weight
H2S, because of hydrogen bonding
H2Se, because of lower molecular weight
Which of the following process will produce hardwater ?
Saturation of water with CaCO3
Saturation of water with MgCO3
Saturation of water with CaSO4
Addition of Na2CO water
In context with the industrial preparation of hydrogen from water gas (CO+H2),which of the following
is the correct statement ?
CO is removed by absorption in aqueous Cu2Cl2 solution
H2 is removed through occlusion with Pd
CO is oxidized to CO2 with steam in the presence of a catalyst followed by absorption of CO2 in alkali
CO and H2 are fractionally separated using differences in their densities
Statement–1 :D2 molecules is more stable than H2.
Statement–2 :The bond dissociation energy of D2 is more than of H2.
Statement-1 is true, statement-2 is true and statement-2 is correct explanation for statement-1.
Statement-1 is true, statement-2 is true and statement-2 is NOT the correct explanation for statement-1.
Statement-1 is true, statement-2 is false.
Statement-1 is false, statement-2 is true
Statement–1 : ZrH2 is a non-stoichiometric hydride.
Statement–2 :The composition of ZrH2 is exact same as its chemical formula.
Statement-1 is true, statement-2 is true and statement-2 is correct explanation for statement-1.
Statement-1 is true, statement-2 is true and statement-2 is NOT the correct explanation for statement-1.
Statement-1 is true, statement-2 is false.
Statement-1 is false, statement-2 is true
Hydrogen can be obtained from water, by the action of water on-
Calcium carbide
Calcium hydride
Calcium oxide
Calcium chloride
Decomposition of H2O2 can be prevented by addition of
Ferrous sulphate
oxalic acid
Ozone
Glycerol
Hydrogen resembles halogens in many respects for which several factors are responsible. Of the following factors which one is most important in this respect?
Its tendency to lose an electron to form a cation.
Its tendency to gain a single electron in its valence shell to attain stable electronic configuration.
Its low negative electron gain enthalpy value.
Its small size.
Metal hydrides are ionic, covalent or molecular in nature. Among LiH, NaH, KH, RbH, CsH, the correct order of increasing ionic character is
LiH > NaH > CsH > KH>RbH
LiH < NaH < KH < RbH < CsH
RbH > CsH > NaH > KH > LiH
NaH > CsH > RbH > LiH > KH
Which of the following hydrides is electron-precise hydride?
B2H6
NH3
H2O
CH4
Radioactive elements emit α, β and γ rays and are characterised by their half lives. Theradioactive isotope of hydrogen is
Protium
Deuterium
Tritium
Hydronium
Consider the reactions
(A) H2O2 + 2HI ----------> I2 + 2H2O
(B) HOCl + H2O2 ----------> 2H3O+ + Cl- + O2
Which of the following statements is correct about H O with reference to these reactions?
Hydrogen peroxide is ________.
an oxidising agent in both (A) and (B)
an oxidising agent in (A) and reducing agent in (B)
a reducing agent in (A) and oxidising agent in (B)
a reducing agent in both (A) and (B)
Which of the following ions will cause hardness in water sample?
(i) Ca2+
(ii) Na+
(iii) Cl-
K+
Dihydrogen can be prepared on commercial scale by different methods. In its preparation by the action of steam on hydrocarbons, a mixture of CO and H gas is formed. It is known as________________
CO2 + H2
Syngas
Producer gas
Industrial gas
Which of the following statement(s) is/are correct in the case of heavy water?
Heavy water is used as a moderator in nuclear reactor.
Heavy water is more effective as solvent than ordinary water.
Heavy water is Less associated than ordinary water.
Heavy water has lower boiling point than ordinary water
Which of the following statements about hydrogen are correct?
Hydrogen has three isotopes of which deuterium is the most common.
Hydrogen never acts as cation in ionic salts.
Hydrogen ion, H , exists freely in solution.
Dihydrogen does not act as a reducing agent
Some of the properties of water are described below. Which of them is/are correct?
6.
Water is known to be a polar aprotic solvent.
(ii) Hydrogen bonding is present to a large extent in liquid water.
(iii) There is no hydrogen bonding in the frozen state of water.
(iv) Frozen water is heavier than liquid water.
Hardness of water may be temporary or permanent. Permanent hardness is due to the presence of
Chlorides of Ca and Mg in water
Sulphites of Ca and Mg in water
Hydrogen carbonates of Ca and Mg in water
Carbonates of alkali metals in water
Assertion (A) : Permanent hardness of water is removed by treatment with washing soda.
Reason (R) : Washing soda reacts with soluble magnesium and calcium sulphate to form
insoluble carbonates.
Statements A and R both are correct and R is the correct explanation of A.
A is correct but R is not correct.
A and R both are correct but R is not the correct explanation of A.
A and R both are false.
In the preparation of Hydrogenated Oil in industries is known as
Oxidation
Reduction
Hydrogenation
Hydration
Most aboundant isotops of hydrogen is
Tritium
Dueterium
Protium
Para - Hydrogen
H2O2 react with KMnO4 in the presence of acidic medium and gives
Mn2+ and O2
Mn4+ and O2
Mn3+ and O3
Mn2+ and Mn4+
Density of water is maximum at
140C
1000C
40C
00C
Metal which does not react with cold water but evolved H2 when react with Steam
Na
K
Fe
Pt
What is the permutit (or zeolite) process for removing the Hpermanent Hadness of water
Hydrated Sodium aluminium silicates
Sodium meta hexa phosphate
sodium silicates
Sodium meta aluminates
The number P-O-P and P=O bond in calgon
12 & 6
12 & 5
6 & 6
none of these
