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.

beta-sulphur is also known as

Answer»

PRISMATIC SULPHUR
RHOMBIC sulphur
plastic sulphur
milk of sulphur

Answer :A
Discussion
2.

beta-pleated structure of protein refer to

Answer»

THREE dimensional structure
Flat sheet
Denatured proteins
linear sequence of amino ACID in POLYPEPTIDE chain

Answer :B
Discussion
3.

beta - pleated structure of proteins is

Answer»

Primary STRUCTURE 
SECONDARY structure 
TERTIARY structure 
Quaternary structure 

Answer :B
Discussion
4.

beta-Phenyl ethyl chloride is the minor product obtained by reaction of chlorine with

Answer»




ANSWER :C
Discussion
5.

beta - particle is emitted in radioactivityby

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conversion of proton to neuton
from OUTERMOST orbit
conversion of NEUTRON to proton
none of these.

Solution :`beta`-particle is emmitted from the NUCLEUS due to conversion of a neutron into a proton.
Discussion
6.

A beta-particle is emitted by a radioactive nucleus at the time of conversion of

Answer»

by conversion of proton to NEUTRON
from outer most orbit
by conversion of neutron to proton
`BETA`- PARTICLE is not emitted.

Answer :C
Discussion
7.

beta-particle is emitted in radioactivity by

Answer»

CONVERSION of proton to neutron
From OUTERMOST orbit
Conversion of neutron to proton
`beta-`particle is not emitted

Answer :C
Discussion
8.

beta - hydroxy butyraldehyde is an example of

Answer»

ALDOL
KETOL
ester
alcohol

ANSWER :A
Discussion
9.

beta-hydroxybutyraldehyde is an example of :

Answer»

Aldol
Diol
HEMIACETAL
ACETAL

ANSWER :A
Discussion
10.

beta - helix structure of proteins is the mostcommon waysin whicha polypeptide chain formsall possiblehydrogenbonds .

Answer»


ANSWER :FALSE
Discussion
11.

beta-emission is always accompanied by

Answer»

for of ANTINEUTRINO and `ALPHA`-particle
EMISSION of `alpha`-particle and `gamma`-ray
formation of antineutrino and `gamma`-ray
formation of antineutrino and positron.

Solution :With the release of antineutrino and `gamma`-ray, extra ENERGY RELEASES.
Discussion
12.

beta- decay from a radioactive nuclide leads to :

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<P>the formation of isobar of parent element
the INCREASE in atomic NUMBER by one UNIT
the decrease in number of neutrons by one unit
the change in atoms mass by one unit

SOLUTION :`""_(0) n^(1) to ""_(+1) p^(1) + ""_(-1) beta` (beta particle ) , So .Z. decreases by 1unit and A remains same
Discussion
13.

beta- elimination of 1-halo-3-methyl butane gives

Answer»

2-methyl but-2-ene
3-methyl but-ene
2-methyl propene
2-methyl butan-2-ol

Answer :A
Discussion
14.

beta - D - 2 - deoxyribose means

Answer»

no H - ATOM at C - 2 position
no OH - group at C - 2 position
no - H - atom at C - 3 position
no - OH - group at C-3 position

Answer :B
Discussion
15.

beta- chlorobuteric acid is named in IUPAC as

Answer»

2-chlorobutanoic ACID
2-chlorobuteric acid
3- chlorobutanoic acid
3 - chlorobuteric acid

ANSWER :C
Discussion
16.

beta-carotin is

Answer»

monoterpene
sequiterpene
diterpene
tetraterpene

Answer :D
Discussion
17.

Best way to protect rusting of iron is bt :

Answer»

making iron CATHODE
putting it in saline water
both of these
none of these.

SOLUTION :(a) Iron will not be ABLE to undergo oxidation when it acts at cathode.
Discussion
18.

Best starting material to synthesize 2-methyl-2-butenoic acid is:

Answer»

`CH_(3)-UNDERSET(OH)underset(|)OVERSET(CH_(3))overset(|)C-CH_(3)`
`CH_(3)CH_(2)CH_(2)CHO`
`CH_(3)-underset(CH_(3))underset(|)"CH"-CHO`
`CH_(3)CH_(2)-overset(O)overset(||)C-CH_(3)`

Answer :D
Discussion
19.

Best reagent for the conversion of AgNO_3 to Ag is ...........

Answer»

`HClO_(4)`
`H_(3)PO_(2)`
`HIO_(4)`
`I_(2)`

Solution :`H_(3)PO_(2)` is REDUCING agent.
Discussion
20.

Best reductant reduces chloroform to:

Answer»

`C_(2)H_(4)`
`CH_(4)`
`C_(2)H_(2)`
`C_(2)H_(6)`

Answer :B
Discussion
21.

Best reagent for nuclear iodination of aromatic compounds is

Answer»

`Ki//CH_(3)COCH_(3)`
`I_(2)//CH_(3)CN`
`KI//CH_(3)COOH`
`I_(2)//HNO_(3)`

SOLUTION :NUCLEAR iodination of benzene occurs in presence of an OXIDISING agent, i.e., `HNO_(3)`
Discussion
22.

Best quality of steel is manufactured by

Answer»

Siemen-Martin's OPEN hearth PROCESS
ELECTRICAL process
Bessemer process
Blast furnace

Solution :Best quality steel is MANUFACTURED by electrical process.
Discussion
23.

Best method to prepare absolute alcohol from ordinary alcohol is by

Answer»

dehydration with anhydrous `CuSO_4`
dehydration with CaO
azeotropic DISTILLATION after MIXING it with benzene.
none of these.

SOLUTION :Now-a-days all absolute ALCOHOL is made by membrane technology.
Discussion
24.

Best method out of the given to prepare B is :

Answer»

`CH_(3)-OVERSET(O)overset(||)C-Cloverset(LiAlH_(4))RARR`
`CH_(3)-overset(O)overset(||)C-Cloverset(NaBH_(4))rarr`
`CH_(3)-overset(O)overset(||)C-Cloverset(H_(2)Pd)underset(BaSO_(4))rarr`
`H-overset(O)overset(||)(C)-OMeoverset(Me_(2)Cd)rarr`

Solution :
Discussion
25.

Best method out of the given to prepare B is

Answer»

`H-OVERSET(O)overset(||)(C)-Cloverset(MeMgBr)to`
`H-overset(O)overset(||)(C)-Cloverset(Me_(2)CD)to`
`H-overset(O)overset(||)(C)-OMeoverset(MeMgCL)to`
`H-overset(O)overset(||)(C)-O Meoverset(Me_(2)Cd)to`

Solution :
Discussion
26.

Best method for preparing primary amone from alkalyl halides without changing the number of carbon atoms in the chain is

Answer»

HOFMANN bromamide reaction
Gabriel PHTHALIMIDE synthesis
Sandmeyer reaction
Reaction with `NH_(3)`

Answer :B
Discussion
27.

Best method for preparing primary amines from alkyl halides without changing the number of carbon atoms in the chain is

Answer»

HOFFMANN bromamide reaction
Gabriel PHTHALIMIDE synthesis
Sandmeyer reaction
Reaction with `NH_(3)`

ANSWER :B
Discussion
28.

Best absorbent for SO_2 is:

Answer»

`H_2SO_4`
`KOH(AQ)`
WATER
`Cacl_2anhyd`

ANSWER :B
Discussion
29.

Bessemerisation is used in the metallurgy of

Answer»

Al
FE
CU
Ag

Solution :Bessemierisation is USED in the METALLURGY of Fe, Cu.
Discussion
30.

Bessemerisation is carried out for I : Fe, II : Cu, III : Al, IV: Silver

Answer»

I, II
II, III
III, IV
I, III

Answer :A
Discussion
31.

Bessemerisation is carried out for (i) Fe (ii) Cu (iii) AI (iv) silver

Answer»

i,ii
ii,iii
iii,iv
i,iii

Solution :"Bessemer" is USED for refining of steel as well as self-reduction of `Cu`
Discussion
32.

Bessemerisation is carried out for :

Answer»

FE, Cu
Cu, Al
Al, Ag
Fe, Al

Answer :A
Discussion
33.

Bessemer converter.

Answer»

SOLUTION :
Discussion
34.

Bessemer convergter is used in the manufacture of

Answer»

PIG iron
Steel
Wrought iron
Cast iron

Answer :B
Discussion
35.

Beryllium shows different properties from rest of the alkaline earth metals because of its small atomic and ionic size, high electronegativity and high polarising power.But beryllium shows similarities in properties to the second member of the next group i.e. aluminium on account of similar atomic and ionic size and nearly same polarising power Which amongst the following is soluble in water ?

Answer»

`BeSO_4`
`BEO`
`Be(OH)_2`
`BeCl_2`

SOLUTION :NA
Discussion
36.

Besides CO_(2)other green housegas is

Answer»

`CH_(4)`
`N_(2)`
`Ar`
`O_(2)`

Answer :A
Discussion
37.

Beryllium shows different properties from rest of the alkaline earth metals because of its small atomic and ionic size, high electronegativity and high polarising power.But beryllium shows similarities in properties to the second member of the next group i.e. aluminium on account of similar atomic and ionic size and nearly same polarising power Which of the following statements is false ?

Answer»

Both `Be(OH)_2` and `Al(OH)_3` dissolve in excess of alkali to GIVE beryllate ion `[Be(OH)_4]^(2-)` and aluminate ion `[Al(OH)_4]^(-)` respectively
CHLORIDES of Be and Al are soluble in organic SOLVENTS and are strong Lewis acid.
Be and Al have strong tendency to form complexes with `F^-` ligands
The chlorides of Be and Al have `Cl^-` BRIDGED structure in liquid phase

Solution :Both have chloride bridged structure in VAPOUR phase.
Discussion
38.

Beryllium shows different properties from rest of the alkaline earth metals because of its small atomic and ionic size, high electronegativity and high polarising power.But beryllium shows similarities in properties to the second member of the next group i.e. aluminium on account of similar atomic and ionic size and nearly same polarising power Which of the following statements is true ?

Answer»

BeO and `Be(OH)_2` both are purely basic in nature
Be can EXPAND its covalency to six
Be LARGELY FORMS covalent compounds which get EASILY hydrolysed
Be combines with hydrogen UPON heating to form `BeH_2`

Solution :(A)BeO and `Be(OH)_2` are amphoteric in nature.
(B)Be cannot expand its covalency greater than four as it does not have vacant d-orbitals.
(C ) Correct statement, on account of high ionisation enthalphy and small size.
(D)Do not combine directly with `H_2` on heating to form hydride. ltbr Method used is: `2BeCl_2 + LiAlH_4 to 2BeH_2 + LiCl+AlCl_3`
Discussion
39.

Beryllium shows diagonal relationship with aluminium. Which of the following similarity is incorrect?

Answer»

`BeCl_2` like `AlC_3` yields METHANE on hydrolysis
Be like AL is randered passive by `HNO_3`
`Be(OH)_2 like Al(OH)_3` is basic
Be FORMS beryllates and Al forms aluminates

Answer :C
Discussion
40.

Beryllium is placed above magnesium in the second group. Beryllium dust, therefore when added to MgCl_(2) solution will

Answer»

Have no effect
Precipitate Mg metal
precipitate MgO
Lead to DISSOLUTION of Be metal

Solution :No DOUBT Be is PLACED above Mg is the second group of PERIODIC table but it is below Mg in electrochemical series.
Discussion
41.

Beryllium is placed above magnesium in the Il group. When beryllium dust is added to MgCl_2solution, it

Answer»

Has no EFFECTS
Precipitates MG METAL
Precipitates MgO
Leads to DISSOLUTION of Be metal

Answer :A
Discussion
42.

Beryllium is placed above magnesium in the II group. Beryllium dust, therefore, therefore, when added to MgCI_2 solution will:

Answer»

Have no effect
Precipitate Mgmetal
Precipitate MgO
Lead to DISSOLUTION of Be metal

Answer :A
Discussion
43.

Beryllium hydride is obtained by:

Answer»

HEATING Be in atmosphere of `H_2`
The ACTION of `BeCl_2` with `LiAlH_4`
The action of Be with `CaH_2`
None of the above

Answer :B
Discussion
44.

Beryllium gives a compound X with the following compositon: Be = 6.1%, N= 37.8 %, Cl = 48% H= 8.1% mol wt of X = 148 g/mol and that oif Be= 9g/mol. Write the molecular formula of the compound by writing the simplest formula from left to write in the order. Be_(X)N_(Y)Cl_(Z)H_(t)

Answer»


ANSWER :x=1, y=4, z=2, t=12
Discussion
45.

Beryllium differs from rest of the members of its family (Group IIA) in many ways. The reason for this is its

Answer»

Small size of higher ELECTRONEGATIVITY
Small size and lower electronegativity
Large size and lower ionisation energy
Large size and largest ionic radius

SOLUTION :(i) Small atomic size.
(ii) High electronegativity
(iii) ABSENCE of d ORBITALS
Discussion
46.

Beryllium chloride can be prepared by passing chlorine vapours over heated mixture of :

Answer»

`BeOandCO_(2)`
`BeCO_(3)ANDC`
`BeOandC`
`Be(OH)_(2)andC`

Solution :`BeO+C+Cl_(2)overset(870-1070K)toBeCl_(2)+CO`
Discussion
47.

Beryllium carbide reacts with water to give :

Answer»

acetylene
ethane
ethylene
METHANE

Solution :`Be_(2)C+2H_(2)Otounderset("Methane")(CH_(4))+2BeO`
Discussion
48.

Beryllium and Aluminium exhibits many properties which are similar but thetwo elements differ in

Answer»

EXHIBITING AMPHOTERIC nature of their oxides
Forming COVALENT halides
Forming POLYMERIC hydrides
Exhibiting maximum COVALENCY in compounds

Answer :D
Discussion
49.

Beryl is mineral of

Answer»

Be
AL
Mg
Fe

Solution :BERYL is mineral of Be & `Al. 2BeO. Al_(2)O_(3). 6SiO_(2)`
Discussion
50.

Beryl is an important ore of:

Answer»

Boron
Beryllium
Lead
Lithium

Answer :D
Discussion