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.

The chemical composition of slag formed during smelting process in the extraction of Cu is

Answer»

`Cu_2 O+FeS`
`FeSiO_3`
`CuFeS_2`
`Cu_2 S +FEO`

ANSWER :B
2.

The chemical composition of Carnallite is:

Answer»

`KCl.MgCl_2.6H_2O`
`MgSO_4.7H_2O`
`MgCO_3.7H_2O`
`MgCO_3`

ANSWER :A
3.

The chemical change in DNA molecule that could lead to synthesis of proteins with an altered amino acid sequence is called :

Answer»

REPLICATION
LIPID formation
Cellular membrane
MUTATION .

Answer :D
4.

The chemical change in a DNA molecules that leads to the synthesis of proteins with different amino acids sequence is called,

Answer»

Allergy
Mutation
Transcription
Metabolism

Answer :B
5.

The chemical change in a DNA molecule that leads to the synthesis of proteins with different amino acids sequence is called

Answer»

Allergy
Mutation
Transcription
Metabolism

Answer :B
6.

The chemical basis of heredity is called

Answer»

DNA
RNA
CHROMOSOMES
NUCLEOSIDES

SOLUTION :DNA
7.

The chelating ligand used to remove excess of copper and iron in chelate therapy is

Answer»

D - PENICILLAMINE
OXALATE ION
EDTA
ETHYLENEDIAMINE

Answer :A
8.

The cheap and having hight melting point compound used in furnace is

Answer»

PbO
CaO
HgO
ZnO

Answer :B
9.

The cheap and high melting point compound used in furnace lining is :

Answer»

PbO
CaO
HgO
ZnO

Answer :B
10.

The charring of sugar takes places when treated with con. H_2SO_4. What is the type of reaction involved in it"

Answer»

Addition REACTION
Disproprotionation reaction
Dehydration reaction
Hydrolysis reaction

SOLUTION :`C_12H_22O_(11) + 11 H_2SO_4 to 12C + 11 H_2O`
11.

The charring product formed when C_6H_12O_6 is heated with conc.H_2SO_4 is due to :

Answer»

OXIDATION
Reduction
DEHYDRATION
Dehydrogenation

ANSWER :C
12.

The charge /size ratio of cation determines its polarising power. Which one of the following sequences represents the increasing order of the polarising power of the cationic species, K^(+), Ca^(2+), Mg^(2+), Be^(2+)?

Answer»

`Ca^(2+)LTMG^(2+)ltBe^(2+)ltK^(+)`
`Mg^(2+)ltBe^(2+)ltK^(+)ltCa^(2+)`
`Be^(2+)ltK^(+)ltCa^(2+)ltMg^(2+)`
`K^(+)ltCa^(2+)ltMg^(2+)ltBe^(2+)`

Solution :High CHARGE and small size of the CATIONS INCREASES polarisation.
As the size of the given cations DECREASES as
`K^(+)gtCa^(2+)gtMg^(2+)gtBe^(2+)`
Hence polarising power is increases as
`K^(+)ltCa^(2)ltMg^(2+)ltBe^(2+)`
13.

The charring of sugar takes places when treated with con. H_(2)SO_(4). What is the type of reaction involed in it''

Answer»

ADDITION reaction
Disproprotionation reaction
Dehydration reaction
Hydrolysis reaction

Answer :C
14.

The charging of sugar , when treated with conc. H_(2)SO_(4), is due to

Answer»

Oxidation
Reduction
DEHYDRATION
Hydrolysis

Solution :Charring of SUGAR, when it is treated with SULPHURIC acid `(H_(2)SO_(4))` is due to dehydration. In this reaction WATER is REMOVED from the sugar.
15.

The charge required for the reduction of 1 mol of MnO_(4)^(-) to MnO_(2) is

Answer»

1 F
3 F
5 F
4 F

Answer :B
16.

The charge required for the reduction of 0.4 mol of K_2Cr_2O_7 toCr^(3+) ions is

Answer»

0.6 F
` 2.4 xx 96500 C `
`6 xx 96500 C `
` 12.4 xx 96500 F `

SOLUTION :`K_2Cr_2 O_7 to Cr^(+3) ,` For 1 mole ` to6 xx 96500 c `, 0.4 mole ` to?`
`(0.4 xx 6 xx 96500)/(1) = 2.4 xx 96500`
17.

The charge required for the reduction of 1 mole of MnO_(4)^(-)to MnO_(2) is

Answer»

1 F
3 F
5 F
7 F

Solution :`overset(+7)MnO_4^(-)+3E^(-)rarroverset(+4)MnO_2`
3F charge will be required to refuse 1 MOLE of `MnO_4 ` to `MnO_2`.
18.

The charge required for reducing 1 mole of MnO_(4)^(-)" to "Mn^(2+) is:

Answer»

`1.93xx10^(5)C`
`2.8xx10^(5)C`
`4.3xx10^(5)C`
`4.82 xx10^(5)C`

ANSWER :D
19.

The charge required for the oxidation of one mole of Mn_3O_4 "to " MnO_4^(2-) in alkaline medium is_____

Answer»

10
5
3.34
2

Answer :A
20.

The charge on the atom containing 8 protons, 9 neutrons and 9 electrons is

Answer»

-1
+1
zero
-2

Answer :A
21.

The charge on positron is equal to the charge on which one of the following

Answer»

PROTON
Electron
`alpha-`particles
Neutron

Solution :Charge on positron and proton is about `+ 1.602 X 10^(-19) C`
22.

The charge on one gram ion of Al^(3+) ion is:

Answer»

`(1)/(27)N_(A)xxe` COULOMB
`(1)/(3)xxN_(A)xxe` coulomb
`(1)/(9)N_(A)xxe` coulomb
`3xxN_(A)xxe` coulomb

Solution :One GRAM ion of `AL^(3+)` means one mole ion of `Al^(+)` charge on 1 mole `Al^(3+)=3xxexxN_(A)` coulomb.
23.

The charge on cobalt in [Co(CN)_6]^3- is:

Answer»

`-6`
`+3`
`-3`
`+6`

ANSWER :B
24.

The charge on cobalt in [Co(CN)_4]^(3-)is:

Answer»

`-6`
`+6`
`-+1`
-3

Answer :C
25.

The charge of the Blast Furnace consists of

Answer»

FE - ORE + COKE + LIME stone
Fe- Ore + Coke + PETROL
Fe- Ore + Petrol + BaS
Fe- Ore + Coke + BaS

Answer :A
26.

The charge of how many coulomb is required to deposit 1.0 g of sodium metal (molar mass 23.0 g mol^(-1)) from solution ions is-

Answer»

2098
96500
193000
4196

Answer :D
27.

The Charge of gama particle is _____

Answer»


SOLUTION :CHARGE of `GAMMA` - PARTICLE is ZERO
28.

The charge of an electron is 1.6xx10^(-19)C. How many electrons pass through the cross section of a copper wire carrying 10^(-16) amp in 1 second ?

Answer»

300
1800
1200
625

Answer :D
29.

The charge of an electron is 1.6 xx 10^(-19) coulomb. How many electrons per seconds pass through a cross section of a Cu wir carrying 10^(-6) amp ?

Answer»

300
1800
1200
600

Answer :D
30.

The charge ( in coulombs) on N_(3)^(+)ions is ,___________.

Answer»

`4.8 XX 10^(19)`
`4.8 xx 10^(-10)`
`1.6 xx 10^(-19)`
96500

Answer :C
31.

What is the charge in Coulombs on Cu^(2+) ion?

Answer»

`3.2xx10^(-19)`
`2.3xx10^(-12)`
`0.23xx10^(-19)`
`0.32xx10^(-19)`

ANSWER :A
32.

The charge carried by 1 millimole of M^(n+) ions is 193 coulombs. The value of n is

Answer»

1
2
3
4

Solution :CHARGE on 1000 millimoles (=1 mole) of `M^(n+)` IONS `= 193 xx 1000C = 193000 C = 2 F`
Hence, n =2
33.

The charge for the reduction of 1 mole of Cr_2O_7^(2-) ions to Cr^(3+) is :

Answer»

96500C
`2xx96500C`
`3xx96500C`
`6xx96500C`

ANSWER :D
34.

The charge balance equation of species in 0.100 M acetic solution is given by

Answer»

`[H^(+)] = [OH^(-)]`
`[H^(+)] = [CH_(3)COO^(-)]`
`[H^(+)] = [OH^(-)] + [CH_(3)COO^(-)]`
`2[H^(+)] = [OH^(-)] + [CH_(3)COO^(-)]`

Answer :D
35.

The charecteristic property shown by transition elements is :

Answer»

They SHOW VARIABLE valency
They from complex COMPOUNDS
They usually from COLOURED compounds
All

Answer :D
36.

The charcoal maintained at 100^(@)C absorbs

Answer»

NE and KR
He and Ar
Ar, Kr and Xe
He and Ne

Answer :C
37.

The charcoal maintained at-100^(@)C absorbs

Answer»

Ne and KR
He and AR
Ar, Kr and Xe
He and Ne

Solution :Ar, Kr and Xe are absorbed by charcoal at `-100^@C`
38.

The characterstic property of solution is (a) formation of solution is physical change (b) solute and solvent in the solution can beseparated by filteration (c)solute and solvent in the solution can be separated by decantation (d) solution can be represented with a chemical formula

Answer»

a,B
a
b,d
c,d

Answer :B
39.

The characterstic property of solution is (a) Formation of solution is physical change (b) Solute and solvent in the solution can be separated by filtration (c) Solute and solvent in the solution can be separated by decantation (d) Solution can be represented with a chemical formula

Answer»

a,B
a
b,d
c,d

ANSWER :B
40.

The characteristic property of detergent :

Answer»

is it contains both hydrophilic and hydro-phobic groups 
is it can ACT as an EMULSIFIER 
is it enables water and OILY SUBSTANCES to form emulsions 
all the above 

Answer :D
41.

the characteristic reactions of aldehydes and ketones are_____reactions.

Answer»

SOLUTION :NUCLEOPHILIC ADDITION.
42.

Characteristic reactions of alkyl halides are

Answer»

ELECTROPHILIC substitution REACTIONS
electrophilic addition reactions
nucleophilic addition reactions
nucleophilic substitution reactions

ANSWER :D
43.

The characteristic oxidation number of metals in free state is:

Answer»

ZERO
ONE
`-1`
Any number

Answer :A
44.

The characteristic odour of lower phenol is ______.

Answer»

carbolic ACID
fruity
oil of BITTER ALMOND
ROTTEN fish

Answer :A
45.

The characteristic odour of lower phenols is _______.

Answer»

carbolic ACID
fruity
oil of bitter almond
ROTTEN fish

ANSWER :A
46.

The characteristic not related to alkali metal is

Answer»

their ions are isoelectronic with noble gases
LOW melting point
low electrongegativity
high ionisation energy

Solution :The ALKALI metals have `ns^(1)` outer ELECTRONIC configuration thus on losing this `e^(-)`, the ion formed will be isoelectronic with noble gases.
The energy binding the ATOMS in the crystal lattices of these metals is relatively low due to presence of only one electron in the valence shell. Thus alkali metals have low melting points.
Alkali metals are highly electropositive thus, they have low electronegativity.
The alkali metals have large size and the outermost electron is far from the nucleus and tus have relatively low ionisation energies.
47.

The characteristic grouping of secondary alcohol is

Answer»


`-CH_2OH`

ANSWER :C
48.

The characteristic group of carboxylic acids is_____.

Answer»

SOLUTION :CARBOXYL (-COOH) GROUP.
49.

Thecharacteristicfunctiongrouppresentin secondaryamine is

Answer»

amino
nitrile
IMINO
nitro

Solution :
50.

The characteristic features of solids are

Answer»

Definite SHAPE
Definite SIZE
Definite shape and size
Definite shape, size and RIGIDITY.

Solution :SOLIDS have definite shape,size and rigidity.