Explore topic-wise InterviewSolutions in Current Affairs.

This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.

1.

Hydrogen has three isotopes. The number of possible diatomic molecules will be

Answer»

3
6
8
9

Answer :B
Discussion
2.

Hydrogen has appreciable acidic character when it is bonded with:

Answer»

`=C-`
`-=C-`
`-C-`
NONE of these

Answer :B
Discussion
3.

Hydrogen halide which does not have reducing property at all

Answer»

HF
HBr
HCl
HI

Answer :A
Discussion
4.

Hydrogen has a tendency to gain one electron in order to Acquire helium configuration . Itthus resembles :

Answer»

ALKALI metals
Noble gases
Halogens
Alkaline EARTH metals

Answer :C
Discussion
5.

Hydrogen gas will not reduce

Answer»

HEATED ALUMINIUM oxide
Heated ferric oxide
Heated STANNIC oxide
Heated cupric oxide

Answer :A
Discussion
6.

Hydrogen gas reduces which metal ion in its aqueous solution?

Answer»

`MG^(2+)`
`LI^(+)`
`Pd^(2+)`
`Zn^(3+)`

ANSWER :C
Discussion
7.

Hydrogen gas produced by heating NaOH with which metal :-

Answer»

Ag
Cu
Zn
Au

Solution :Only AMPHOTERIC METAL REACT with NAOH
Discussion
8.

Hydrogen gas is prepared in the laboratory by reacting dilute HCl with granulated zinc. Following reaction taken place : Zn+2HCl rarr ZnCl_(2)+H_(2) Calculate the volume of hydrogen gas liberated at STP when 32.65 g of zinc reacts with HCl.1 mol of a gas occupies 22.7 L volume at STP , atomic mass of Zn = 65.3 u.

Answer»

Solution :1 MOLE of Zn, i.e., 65.3 g produced 1 mole of `H_(2)`, i.e., 22.7 L or STP
`therefore"32.65 g of Zn will PRODUCE "H_(2)" at sTP"=(22.7)/(65.3)xx32.65=11.35L`
Discussion
9.

Hydrogen gas is used on industrial scale in the manufacture of :

Answer»

`H_2SO_4`
`C_2H_2`
Margarine
Water

Answer :C
Discussion
10.

Hydrogen gas is not liberated when the following metal added to dill HCl

Answer»

Mg
Sn
Ag
Zn

Solution :Reduction POTENTIAL of Ag is more than other given SPECIES , so Ag has greater tendency to GET reduced in comparison to other species , hence does not liberate HYDROGEN gas added to DIL HCl.
Discussion
11.

Hydrogen gas is liberated when dil. H_2SO_4 react with

Answer»

Cu
Fe
C
S

Answer :B
Discussion
12.

Hydrogen gas can be produced by the reaction of aluminium with a concentrated solution of:

Answer»

`Fe_2O_3`
ACETIC acid
NaOH
NaF

Answer :C
Discussion
13.

Hydrogen from HCl can be prepared by

Answer»

Mg
P
Cu
Hg

SOLUTION :`Mg+2HClrarr MgCl_(2)+H_(2)UARR`
Discussion
14.

Hydrogen fluoride is liquid unlike other halides because :

Answer»

`F_(2)` is highly reactive
HF molecules associate due to hydrogen bonding
HF is weakest ACID of all hydrogen halides
fluorine is SMALLEST of all HALOGEN ATOMS

Answer :B
Discussion
15.

Hydrogen forms a bridge in the chemical structure of :

Answer»

HYDROGEN peroxide
Lithium hydride
Diborane
Sodium peroxide

Answer :C
Discussion
16.

(a) Draw the structures of the following :(i) XeF_(4)(ii) H_(2)S_(2)O_(7)(iii) SO_(3)^(2-)(b) Explain the following observations : (i)Phosphorous has a greater tendency for catenation than nitrogen.(ii) The negative value of electron gain enthalpy is less for fluorine than that for chlorine.(iii) Hydrogen fluoride has a much higher boiling point than hydrogen chloride.

Answer»

SOLUTION :HYDROGEN BONDING
Discussion
17.

Hydrogen fluoride is a better reducing agent than hydrogen bromide.

Answer»

SOLUTION :Hydrogen jodide is a beller reducing agent than hydrogen BROMIDE
Discussion
18.

Hydrogen fluoride has usually high boiling point because of................

Answer»

SOLUTION :HYDROGEN BONDING
Discussion
19.

Hydrogen electrode is

Answer»

reversible with respect to `H^(+)` IONS
a secondary reference electrode
an indicator electrode
IRREVERSIBLE with respect to `H^(+)` ions

SOLUTION :By definition , SHE is reversible with respect to `H^(+)` ions .
The oxidation reaction is = `(1)/(2) H_(2) to H^(+) + e^(-)`
Discussion
20.

Hydrogen cyanide is produced industrially from the reaction of gaseous ammonia, oxygen and mthane. 2NH_(3) (g) + 3O_(2) (g) + 2CH_(4) (g) rarr 2HCN (g) + 6H_(2) O (g) If 5 kg of each reactant is used then what mass of H_(2)O (g) will be formed.

Answer»

`5.6 gm`
`2.81 kg`
`5.29 kg`
`8.43 kg`

Solution :`{:(,2NH_(3) (g),+,3 O_(2) (g),+,2 CH_(4) (g),rarr,2 HCN (g),+,6 H_(2)O (g),),(,5 kg,,5 kg,,5 kg,,,,,),(n =,(5)/(17) K "mole",,(5)/(32) K "mole",,(5)/(16) K "mole",,,,,),(,O_(2) "is" LR,,,,,,,,,):}`
Moles of `H_(2)O` FORMED `= (5)/(32) XX 2 xx 10^(3)` mole `= (5)/(16) K` mole
Mass of water formed `= (5)/(16) xx 18 xx 10^(3) gm`
`= 5.6 Kg`
Discussion
21.

Hydrogen diffuses six time faster than gas A. tham molar mass of gas A is

Answer»

72
6
24
36

Solution :`(r_(H_(2)))/(r_(A))=SQRT((M_(A))/(M_(H_(2))))=:.6=sqrt((M_(A))/2)` or `M_(A)=72`
Discussion
22.

Hydrogen diffuses six times faster than the gas A. The molar mass of gas A is

Answer»

72
6
24
36

Solution :`(r_(H))/(r_(A))=sqrt((M_(A))/(M_(H)))rArr6=sqrt((M_(A))/(2))`
`RARR``36=(M_(A))/(2)rArrM_(A)=72`
Discussion
23.

Hydrogen cyanide is reacted with ethyl magnesium halide gives

Answer»

ISO BUTANE
ethane
butan-l-ol
butan-2-ol

Answer :B
Discussion
24.

Hydrogen cyanide

Answer»

Solution :Action of hydrogen CYANIDE: Glucose react with hydrogen cyanide to form glucose cyanohydrin.
`UNDERSET("Glucose")underset(CH_(2)OH)underset(|)OVERSET(CHO)overset(|)((CHOH)_(4))overset(HCN)to underset("Glucose cyannohydrin")underset(CH_2OH)underset(|)overset(CN)overset(|)overset(CHOH)overset(|)((CHOH)_(4))`
Discussion
25.

Hydrogen cyanide and hydrogen isocyanide are:

Answer»

fuctional isomers
Positional isomers
Metamers
Chain isomers

Answer :A
Discussion
26.

Hydrogen combines with chlroine to form HCl. It also combines with sodium to form NaH. If sodium and chlorine also combine with each other, they will do so in the ratio of their masses as:

Answer»

`23:35.5`
`35.5:23`
`1:1`
`23:1`

ANSWER :A
Discussion
27.

Hydrogen combines directly with:

Answer»

CA
`CU^+`
Zn
Fe

Answer :A
Discussion
28.

Hydrogen chloride and So, are the by products in the reaction of ethanol with thionyl chloride. Which of the following is the main product in this reaction ?

Answer»

`C_2 H_5 OC_2 H_5`
`C_2 H_6`
`CH_3 CL`
`C_2 H_5 Cl`

ANSWER :D
Discussion
29.

Hydrogen can be put in halogen group because

Answer»

It has deuterium and tritium as isotopes
It forms hydrides LIKE chlorides
It CONTAINS one electron only
It is light

Solution :HYDROGEN, forms hydrides like HALIDES, e.g. HCl.
Discussion
30.

Hydrogen can be placed in halogens group because:

Answer»

H is light
H contains ONE electron only
It forms hydrides LIKE halides
It has ISOTOPES D and T

Answer :C
Discussion
31.

Hydrogen can be placed :

Answer»

IA
IVA
VIIA
both (1) and (3)

SOLUTION :NORMALLY hydrogen is placed in IA group because of properties (Valence SHELL electronic configuration) is similar with IA group element
Discussion
32.

Hydrogen burns with:

Answer»

SMOKY flame
YELLOW flame
Blue flame
Pale yellow flame

Answer :C
Discussion
33.

Hydrogen burns in air with a

Answer»

LIGHT bluish FLAME
yellow flame
GREEN flame
none of these

Solution :HYDROGEN burns in air with a light bluish flame.
Discussion
34.

To the compound CH_3 -CH =CH_2, hydrogen bromide is added in the presence of peroxides the resultant compound formed is :

Answer»

`CH_3CHBrCH_3`
`C_2H_5CH_2BR`
`CH_2=CH_2CH_2BR`
NONE of these

Answer :B
Discussion
35.

Hydrogen bromide is dried by passing the gas through:

Answer»

Quicklime
Anhydrous `CaCl_2`
KOH pellets
Conc.`H_2SO_4`

ANSWER :B
Discussion
36.

Hydrogen bonding would not affect the boiling point of :

Answer»

HI
`NH_3 `
`CH_3OH`
`H_2O `

ANSWER :A
Discussion
37.

Hydrogen bonding plays a central role in the following phenomena:

Answer»

ICE floats in water
Higher Lewis basicitiy of primary amines than tertiary amines in aqueous solutions
forminc acid is more acidic than acetic acid
Dimerisation of acetic acid in benzene

Solution :Due to CAGE like structure in which each water molecule is SURROUNDED by four other water molecules tetrahedrally through H-bonding, there are a number of vacant spaces I the crystal lattice of ice. As a result, ice has lower density than water and hence floats in water.
(b) Due to greater H-bonding, the ammonium cation derived from `1^(@)` amine is mroe stable than that derived from `3^(@)` amine. (c) Due to absence of +I-effect of the `CH_(3)` group, HCOOH is a stronger acid than `CH_(3)COOH` and not due to H-bonding. thus. option (c) is wrong.
(d) Acetic aacid dimerises in benzene due to H-bonding.
Discussion
38.

Hydrogen bonding originates from the dipole-dipole interaction between H-atom and any of the other atom like F, O, N and in some cases with Cl atom. There are two types of H-bonding like intermolecular and intramolecular H-bondingThe pairs of bases in DNA are held together by

Answer»

Hydrogen bonds
Ionic bonds
PHOSPHATE groups
DEOXYRIBOSE group

Answer :A
Discussion
39.

Hydrogen bonding originates from the dipole-dipole interaction between H-atom and any of the other atom like F, O, N and in some cases with Cl atom. There are two types of H-bonding like intermolecular and intramolecular H-bondingIntramolecular hydrogen bonding is found in

Answer»

SALICYLADEHYDE
WATER
ACETALDEHYDE
Phenol

Answer :A
Discussion
40.

Hydrogen bonding originates from the dipole-dipole interaction between H-atom and any of the other atom like F, O, N and in some cases with Cl atom. There are two types of H-bonding like intermolecular and intramolecular H-bonding Which of following statement is incorrect

Answer»

Boiling point of `H_2O_2` is greater than `H_2O`.
Ethylene glycol is less viscous than glycerol
o-nitrophenol can be SEPARATED from its meta and para isomer USING its steam volatile property.
In ice each 'O' atom is tetrahedrally ARRANGED by FOUR H-atoms which are all equidistant.

Answer :D
Discussion
41.

Hydrogen bonding originates from the dipole-dipole interaction between H-atom and any of the other atom like F, O, N and in some cases with Cl atom. There are two types of H-bonding like intermolecular and intramolecular H-bonding Which of the following plot for rho (density) v/s T (temperature) for liquid H_2O is correct

Answer»




ANSWER :A
Discussion
42.

Hydrogen bonding is not shown by

Answer»

Water
Glycerol
Hydrogen fluoride
Hydrogen SULPHIDE

ANSWER :D
Discussion
43.

Hydrogen bonding is maximum in:

Answer»

`C_(2)H_(5)OH`
`CH_(3)OCH_(3)`
`(CH_(3))_(2)C=O`
`CH_(3)CHO`

Solution :Hydrogen bonding is possible only in compounds having hydrogen attached with F, O, or N.
`underset(("H-bonding possible"))(C_(2)H_(5)-OH) underset(("H-bonding not possible"))(CH_(3)-O-CH_(3))`
`underset(("H-bonding not possible")) overset(O) overset(||)(CH_(3)-C-CH_(3)) underset(("H-bonding not possible")) overset(O) overset(||) (CH_(3)-O-CH_(3))`
Discussion
44.

Hydrogen bonding is maximum in

Answer»

`C_(2)H_(5)OH`
`CH_(3)-O-CH_(3)`
`(CH_(3))_(2)C=O`
`CH_(3)CHO`

ANSWER :A
Discussion
45.

Hydrogen bonding is maximum in :

Answer»

Ethanol
Diethyl ether
Ethyl CHLORIDE
TRIETHYL amine

Answer :A
Discussion
46.

Hydrogen bonding does not play any role in boiling of

Answer»

`NH_(3)`
`H_(2)O`
HI
`C_(2)H_(5)OH`

Answer :C
Discussion
47.

Hydrogen bond is the given to the relatively weak secondry interaction between a hydrogen atom bound to an electronegative atom and another atom which is also generally electronegative and which has one or more lone pairs and can thus acts as a base. We can give the follwoing generalized representation of hydrogen bond. overset(delta-)(X)-overset(delta+)(H)...Y Bond dissociation energy of H-bond ranges from 8 and 42kJ/ol, and the most commonly encountred hydrogen bonds are O-H...O, N-H...O and F-H..E. Q.Whichof the following interaction has energy between 8-42kJ/mol?

Answer»

`NA^(+):C Cl_(4)`
`CHCl_(3):Br^(-)`
`C_(6)H_(6):C Cl_(4)`
`H_(2)O: HCN`

Solution :`Na^(+):C C_(4)`: ion-induced dipole `lt8`kJ/mol
`CHCl_(3):Br`: Weaker ion-dipole `lt8`kJ/mol
`C_(2)H_(6)`: London dipersion FORCES`lt8`kJ/mol
`H_(2)O:HCN`: Unsymmetrical H-bond :8-42kJ/mol
Discussion
48.

Hydrogen bond is weak type of electrostatic force, in which hydrogen is connected between two more electronegative elements. Select the correct representation of H-bonding :

Answer»

`H-O-H-H-OVERSET(H)overset(|)UNDERSET(H)underset(|)"N"`
`{:(CH_(2)-OH),("|"),("HC"-O-H-CH_(3)-O-H),("|"),(H_(2)C-OH):}`

`H-overset(H)overset(|)O-H-overset(H)overset(|)underset(H)underset(|)"N"`

Answer :D
Discussion
49.

Hydrogen bond is the given to the relatively weak secondry interaction between a hydrogen atom bound to an electronegative atom and another atom which is also generally electronegative and which has one or more lone pairs and can thus acts as a base. We can give the follwoing generalized representation of hydrogen bond. overset(delta-)(X)-overset(delta+)(H)...Y Bond dissociation energy of H-bond ranges from 8 and 42kJ/ol, and the most commonly encountred hydrogen bonds are O-H...O, N-H...O and F-H..E. Q. Among molecules of HCl, which of the following forces are present.

Answer»

Interaction between two HCl MOLECULES is found to be greater than 8kJ/mol
Weak dipole-dipole interaction
Weak ion-dipole interactions
All of above

Solution :`overset(DELTA+)(H)-overset(delta-)(C)overset(E)(…)overset(delta+)(H)-overset(delta-)(Cl)`. The bondenergy (E) between two `H-Cl` molecules, caused by dipole-dipole interaction is not found to be in the range of unsymmetrical H-bond ENERY, RATHER it is less than 8 kJ/mol, hence this interation is CALLED weak dipole-dipole interaction.
Discussion
50.

Hydrogen bond is formed in HF due to

Answer»

SMALL SIZE and LOW electronegativity of F.
small size and HIGH electronegativity of F.
big size and high electronegativity of F.
big size and low electronegativity of F.

Solution : small size and high electronegativity of F.
Discussion