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.

List down the kinds of sentences

Answer»

a) declarative 

b) interrogative 

c) imperative 

d) exclamatory

2.

The inner urge to do something or to engage in goal oriented behaviour a) Identify the concept stated above. b) Why is it important for an individual?

Answer»

a) self motivation 

b) it affects cognitive processes and learning strategies for completing similar tasks. 

3.

Rearing of bees isA. HorticultureB. ApiaryC. ApicultureD. Poultry

Answer» Correct Answer - C
4.

Fifth group elements form hydrides to type `AH_(3)`. The hydrides have a lone pair of electrons. The hydries are reducing in nature and the reducing power is related to the stability of A-H bonds. The hydrides are covalent and low boiling. Their boiling points depends on their ability to from hydrogen bond and their molecular size which decide the intermolcular forces in the hydrides . The H-M-H bond angle of `V` group hydrides decrease from `107^(circ)` to `90^(circ)` for `NH_(3)` to `SbH_(3)` , this is due to:A. Increase in strength of bases with molecular weightB. use of pour p-orbital for M-H bonding in hydrides of higher molecular weightC. Bond energies of M-H bonds increaaseD. Bond pairs of electrons go closer to central atom

Answer» Correct Answer - B
In successive hydrides starting from N to Sb, the lone pair causes distortion of M-H bonds. The bond angle decrease from `107^@` to `90^@`.This suggests tha orbitals used in M-H bonding are almost pure p-orbitals
5.

Fifth group elements form hydrides to type `AH_(3)`. The hydrides have a lone pair of electrons. The hydries are reducing in nature and the reducing power is related to the stability of A-H bonds. The hydrides are covalent and low boiling. Their boiling points depends on their ability to from hydrogen bond and their molecular size which decide the intermolcular forces in the hydrides . Reducing power of V-group hydrides are in order :A. `NH_3 gt PH_3 gt AsH_3 gt SbH_3 gt BiH_3`B. `BiH_3 gt SbH_3 gt AsH_3 gt PH_3 gt NH_3 `C. ` PH_3 gt NH_3 gt AsH_3 gt SbH_3 gt BiH_3`D. `BiH_3 gt SbH_3 gt AsH_3 gt NH_3 gt PH_3 `

Answer» Correct Answer - B
A-H bond energy decreases with increase in size of A.Hence Bi-H bond readily breaks to make it the best reducer and the reducing power decrease of size of A.
6.

Fifth group elements form hydrides of type `AH_3`.The hydrides have a lone pair of electrons.The hydrides are reducing in nature and the reducing power is related to the stability of A-H bonds.The hydrides are covalent and low boiling.Their boiling point depends on their ability to form hydrogen bond and their molecular size which which decide the intermolecular forces in the hydrides. The boiling poins of the hydrides of V-group elements are in the order :A. `NH_3 gt PH_3 gt AsH_3 gt SbH_3`B. `NH_3 gt AsH_3 gt SbH_3 gt PH_3 `C. `SbH_3 gt NH_3 gt AsH_3 gt PH_3 `D. `AsH_3 gt SbH_3 gt NH_3 gt PH_3 `

Answer» Correct Answer - C
Due to increase in size from `PH_3` to `SbH_3` the van der Waals forces increase.So their boiling points increase from `PH_3` to `SbH_3`.But does to intermolecular hydrogen bonding, `NH_3` has very high boiling point but less than that of `SbH_3`.
7.

Insects which feed other insects are to be known as a. Entomophagous b. Cannibalism c. Parasitism d. Predatism

Answer»

Insects which feed other insects are to be known as Entomophagous.

8.

Fifth group elements form hydrides of type `AH_3`.The hydrides have a lone pair of electrons.The hydrides are reducing in nature and the reducing power is related to the stability of A-H bonds.The hydrides are covalent and low boiling.Their boiling point depends on their ability to form hydrogen bond and their molecular size which which decide the intermolecular forces in the hydrides. Which of the following statements is true ?A. Gas (G) reacts with conc NaOH to form `OF_2`B. Pale Blue gas (E) oxidises alkaline KI to `KIO_3`C. Pale blue gas (E) in acidic medium reacts with `K_2Cr_2O_7` to form a bright blue coloured compound `(CrO_5)`D. (B) and (C ) both

Answer» Correct Answer - B
(A)`F_2` gives`O_2` gas (C )`H_2O_2` in acidic medium form `CrO_5 , "not" O_3`
(B)`KI+3O_3 to KIO_3 + 3O_2`
`underset((A))(XeF_2)overset(H_2)tounderset((B))(Xe)+underset((C ))(2HF)`
`XeF_2+H_2overset(H_2)to+underset((B))(Xe)+underset((C ))(HF)+underset((D))(O_2)`
`underset(( D))(3O_2)hArrunderset((E))(2O_3),5O_3+2KOH to 2KO_3`(orange solid)+`5O_2+H_2O`
`underset(( C))(HF)+KFtoKHF_2("molten")overset("Electrolysis")tounderset((G))(F_2)`
9.

After attending a class on immunity, Arun raised a question to his teacher.“In spite of so many defense mechanisms in the body, why are we still affected by diseases?a) What explanation will you give for Arun’s doubt?

Answer»
  • Bad habits
  • Unhealthy food habits
  • Unhygienic
  • Excess pathogens
10.

Give four examples of program files

Answer»

Program Files is the name of the directory or the standard folder in Windows where third-party applications are installed by default. An application installed in this folder has its own subfolder where all of its program data go.

11.

What is the difference between seek and tell function . Explain with pr0gram

Answer»

The tell function is used to determine the current position of the file pointer, and the seek function is used to move the file pointer to the specified position of the file.

12.

`{:("Column I","Column II"),((A)"Sheet silicate",(p)"Contain Si-O-Si bond"),((B)"Silicone",(q)"General formula" (SIO_3)_(n)^(-2n)),(( C)"Cyclic silicates",(r)Si_2O_7^(-6)),((D)"Pyro silicate",(s)(Si_4O_11)_n^(-6n)):}`

Answer» Correct Answer - A`to`s ; B`to`p ; C`to`q ; D`to` r
(A)Sheet silicate `to (Si_4O_11)_n^(-6n)`
(B)Silicone `to` Contain Si-O-Si bond
(C )Cyclic silicate `to underset((SiO_3)_n^(-2n))("General formula")`
(D)Pyro silicate `Si_2O_7^(-5)`
13.

To cut the file or folder, which shortcut key will you use on the computer? a) Ctrl+ V b) Ctrl+ Y c) Ctrl+ P d) Ctrl+ X

Answer»

Correct potion: d) Ctrl+ X

14.

Explain the different ways of finding a file or folder

Answer»

Click the Start button, the search box appears at the bottom of the start menu. Type the name of the file or the folder you want to search. Even if you give the part of the file or folder name, it will display the list of files or folders starting with the specified name.

15.

Complete the illustration

Answer»

a) B – lymphocyte 

b) T – Lymphocyte

i) Stimulates white blood cell and destroys pathogens

ii) Destroys the bacteria by disintegrating their cell membrane

iii) Stimulates defense cells 

iv) Destroys the cell which is affected by virus.

16.

Match the reactions mentioned in column-I with the nature of the reaction/characteristics of the products mentioned in column-II. `{:("Column I","Column II"),((A)(NH_4)_2S_2O_8+H_2Ooverset("distillation")to,(p)"Hydrolysis"),((B)NaBO_2+H_2O+H_2O_2overset(OH^(-))to,(q)"One of the products has peroxide linkage" ),(( C)Na_2SO_3underset("temperature")overset("fusior")to,(r)"Disproportionation"),((D)"2-Ethyl anthraquinol+air"to,(s)"In one of the products the central atom has" sp^3 "hybridisation"),(,(t)"One of the products is used as brighter in washing powder".):}`

Answer» Correct Answer - A`to`p,q,s ; B`to`p,q,s,t ; C`to`r,s ; D`to` q,s
(A)`(NH_4)_2S_2O_8+H_2Ooverset("Hydrolysis")to2NH_4HSO_4+H_2O_2`
(B)`2NaBO_2+H_2O_2+6H_2Ooverset("Alkaline hydrolysis")toNa[(OH)_2B_2(O-O)_2(OH)_2]6H_2O`
Peroxoborate is used as brighter in washing power.
(C )`4Na_2SO_3 overset("disproportionation")toNa_2S+Na_2SO_4`
(D)2-Ethylanthraqunol + air `(O_2)to`2-ethylanthraquinone +`H_2O_2`
17.

Three physical quantities are listed in column I and their values are listed in column II in random order Match the oppropriate quantities. `{:(,"Column-I",,"Column-II"),("(a)","binding energy of heavy nuclei per nucleon",,"(1) 10 keV"),("(b)","X-ray photon energy",,"(2) 7 MeV"),("(c)","Photon energy of visible light",,"(3) 2 eV"):}`

Answer» Correct Answer - [(a)(2)(b)(1)(c)(3)]
energy of photon `=(hc)/ lambda`
`lambda=1240/lambda, lambda=620 mm`
`1240/ lambda = 7xx10^(6)=177xx10^(-15)` m
18.

Complete the illustration suitability related to antibiotics

Answer»

A) Prevent bacterial diseases 

B) Prolonged use may develop immunity in germs 

C) Destruction of useful bacteria 

D) Deficiency of certain vitamins in the body

19.

Observe figures A, B and C and identify the instance in which the following type of first aid is given.

Answer»
  • A – Breathing has stopped but heartbeat has not as in drowning electric shock, choking gas, suffocation, etc.
  • B – Bone and ligament injuries; and fractures
  • C – Choking occurs when an object swallowing

Blood Transfusion

The transfer of blood from one person to another is called blood transfusion. Certain instances such as blood is lost excessively in accidents, affected with diseases like blood cancer and surgical operations require blood transfusion.

Different Types of Blood Group

A, B, AB, O are the main blood groups. Carl Landsteiner proposed blood grouping on the basis of the presence or absence of A, B antigens seen on the surface of the red blood cells. The blood group in which Rh factor is present are positive blood groups and those without Rh factor are negative blood groups.

20.

What do you mean by green jobs in building and construction?

Answer»

Green buildings use ecofriendly materials, benefit environment by conserving energy.

21.

Explain music as a self-motivator.

Answer»

Music is the language of the soul. A good inspiring piece touches everybody’s heart and can help create miracles.

22.

What do you understand by adaptability in being an entrepreneur?

Answer»

Adapting to changing conditions is an essential part of running your life -- and your business. The business landscape changes all the time and you have to be ready for it. Without adaptability, you are going to find yourself in serious trouble.

23.

Is it proper to use antibiotics without recommendation by a doctor? Why?Discuss. Write your inferences in the science diary.

Answer»

No. Though antibiotics are effective medicines, their regular use brings many side effects. Therefore use medicines only by the instruction of the doctor. Doctors prescribe medicine by considering the dose, method of use, period of use, age of the patient, etc. indiscriminate use of them causes health problems. Regular use develops immunity in pathogens against antibiotics, destroys useful bacteria in the body and reduces the quantity of some vitamins. So self-treatment without the instruction of the doctor is not good.

24.

The doctor prescribed antibiotics to Sunil who is affected with cholera, but not to Anil who is affected with chickenpox. What is the reason?

Answer»

Antibiotics are used to prevent bacterial diseases. Chickenpox is a viral disease. Cholera is a bacterial disease. So the doctor prescribed antibiotics to Sunni.

25.

Write any 2 ways in which communication can be done

Answer»

2 ways communication can be done Verbal and Non-verbal.

26.

Write chemical equations for the following reactions: (i) Calcium metal reacts with water. (ii) Cinnabar is heated in the presence of air (iii) Manganese dioxide is heated with aluminum power. 

Answer»

(i) Ca + H2 Ca(OH)2 + H

(ii) 2HgS + 3O2  2HgO + 2SO2 

(iii) No, reaction takes place because manganese is less reactive than aluminium.

27.

Write the chemical formula and name of the compound which is the active ingredient of all alcoholic drinks. List its two uses. Write chemical equation and name of the product formed when this compound reacts with (i) Sodium metal (ii) Hot concentrated sulphuric acid  

Answer»

(i) Chemical formula - CH3CH2OH 

Name of compound - Ethanol 

Two uses of ethanol

(1) It is used as a fuel 

(2) It is used as and anti bacterial hand sanitizer gels as an antiseptic 

CH3CH2OH + Na  CH3CH2ONa + H2

∴ Hydrogen gas is evolved. 

(ii) Ethanol on reacting with hot concentrate sulphuric acid produces ethene and water. 

CH3–CH2–OH  (H2SO4 + Heat)  CH2 = CH2 + H2O

28.

Which of the following is a non-renewable source of energy?1. Wind power2. Hydel power3. Solar power4. Fossil fuels

Answer» Correct Answer - Option 4 : Fossil fuels

The correct answer is Fossil fuels.

Non-Renewable Resources Examples

  • Fossil Fuel
  • Coal
  • Rare earth elements
  • Petroleum products
  • Uranium

Thus, Fossil fuels are a non-renewable source of energy.

 

Types of Renewable Energy

Solar Energy:

  • The radiant light and heat energy from the sun is harnessed with the use of solar collectors.
  • These solar collectors are of various types such as photovoltaics, concentrator photovoltaics, solar heating, (CSP) concentrated solar power, artificial photosynthesis, and solar architecture.
  • This collected solar energy is then used to provide light, heat, and different other forms of electricity.

Wind Energy:

  • The energy we get from winds is known as wind energy.
  • For this, windmills have been used for hundreds of years to pump out water from the ground. We use large tall wind turbines that allow winds to generate electricity.
  • The natural airflow on the surface of the earth is used to run the wind turbines.
  • The most preferred locations for these wind turbines to be installed are the areas which and strong and have constant airflows on offshore and sites that are at high altitudes.

Hydroelectricity:

  • According to statistics, hydroelectricity generated around 16.6% of the global energy resources and constituted about 70% of all the renewable electricity.
  • This energy is another alternative source of energy that is generated by the construction of dams and reservoirs on the flowing water, the kinetic energy from the flowing water is used to run the turbines which generate electricity.
  • Tidal power converts the energy of tides and Wave power which captures the energy from the surface of the ocean waves for power generation.
  • These two forms of hydropower also have huge potential in electric power generation

Geothermal Energy:

  • It is the energy that is generated from the thermal energy which is stored in the earth.
  • The heat energy is captured on sources such as hot springs and volcanoes and this heat is directly used by industries for heating the water and other purposes.

Bio-Energy:

  • This type of energy is derived from biomass which is a type of biological material derived from living organisms and plant-derived materials which are called lignocellulosic biomass.
  • Biomass can be directly used via combustion to produce heat and indirectly it can be used to convert to biofuels.
  • Biomass can be converted to other usable forms of energy such as transportation fuels like ethanol, biodiesel, and methane gas.
29.

Matsya Jantra-an ancient India instrument is a precursor to what?

Answer»

Correct answer is Compass

30.

Why the boiling point of ammonia is greater than phosphine?

Answer» Nitrogen is more electronegative as compared to phosphorous, hence ammonia `(NH_3)` is capable of forming hydrogen bonding whereas phosphine `(PH_3)` cannot form hydrogen bonding. Due to hydrogen bonding `NH_3` has much greater boiling point than phosphine.
31.

Why NO is paramagnetic?

Answer» Due to unpaired electron in `Pi^(*)2p` orbital, NO is paramagnetic molecule.
32.

Why nitrogen gas is inert?

Answer» Nitrogen gas is inert as in nitrogen gas, `N_2` molecule `N-=N` is present Hence large amount of bond dissociation enthaply is required for their dissociation.
33.

Which has greater bond energy amongs ? (a) F2(b) Cl2(c) Br2(d)  I2

Answer»

Cl has greater bond energy .

34.

Why phosphorus is more reactive than nitrogen?

Answer» In phosphorous molecule `P_4` the angle `anglePPP=60^@`. Due to high angular strain phosphorous is highly reactive, whereas nitrogen molecule, `N_2` exists as `N-=N` and hence due to triple bond very high bond dissociation energy is required and `N_2` is inert.
35.

Which of the following oxides is neutral ?(a) N2O3 (b) N2O4 (c) N2O5 (d) N2O

Answer»

 (d) N2O3 , N2O4 and N2O5 are acidic oxides. Only N2O is neutral oxide

36.

Why nitrogen does not form penthalides?

Answer» Nitrongen due to absence of vacant d-orbitals in its valence shell cannot have covalency greater than four.
37.

Which of the following oxides of nitrogen is a coloured gas?(a) N2O (b) NO (c) N2O5 (d) NO2

Answer»

(d) NO2 is reddish brown coloured gas. Rest of the oxides are colourless.

38.

Carbon dioxide is used for extinguishing fire because (a) it has a relatively high critical temperature (b) in solid state, it is called dry ice (c) it is neither combustible nor a supporter of combustion (d) it is a colour less gas  

Answer»

(c) it is neither combustible nor a supporter of combustion 

39.

Acid rain may cause (a) rusting easier (b) stone cancer in Taj Mahal (c) non – fertility of soil (d) all are correct

Answer»

(d) all are correct

40.

`H_(2)CO_(3)` ionises `1.5` percent in its decimolar solution pH of solution will be `:-`A. `2.85`B. `2.52`C. `2.22`D. `3.22`

Answer» Correct Answer - B
41.

A solution required `[OH^(-)]=2M`. If degree of dissociation of `Mg(OH)_(2)` is `alpha`, what analytical molarity solution of `Mg(OH)_(2)` isA. `alpha`B. `2alpha`C. `1//alpha`D. `1//2alpha`

Answer» Correct Answer - C
42.

The number of oxygen atoms in 4.4 g of `CO_(2)` is approx. :-A. `1.2 xx 10^(23)`B. `6 xx 10^(22)`C. `6 xx 10^(23)`D. `12 xx 10^(23)`

Answer» Correct Answer - A
43.

The volume occupied by 4.4 gram of `CO_(2)` at STP is :-A. 22.4 LB. 2.24 LC. 0.224 LD. 0.1 L

Answer» Correct Answer - A
44.

The number of atoms in 4.25 g of `NH_(3)` is approximately :-A. `1 xx 10^(23)`B. `2 xx 10^(23)`C. `4 xx 10^(23)`D. `6 xx 10^(23)`

Answer» Correct Answer - A
45.

The mass of a molecule of the compound `C_(60) H_(122)` is :-A. `1.4 xx 10^(-21) g`B. `1.09 xx 10^(-21) g`C. `5.025 xx 10^(23) g`D. `16.023 xx 10^(23) g`

Answer» Correct Answer - A
46.

Vapour density of a gas is 22. What is its molecular mass ?A. 33B. 22C. 44D. 11

Answer» Correct Answer - A
47.

BaO2 is a peroxide but PbO2 is not a peroxide why?

Answer»

Metallic oxides which on treatment with dilute acids produce hydrogen peroxide are called peroxides. All peroxides contain a peroxide ion (O2)2- having the structure [– O – O –]. PbO2 does not contain a peroxide ion n (O2)2- and it can not be called as peroxides.

48.

The number of paramagnetic species among the following is ______.B2, Li2, C2, \(C^-_2\) , \(O^-_2\) , \(O^+_2\) and \(He^+_-\)

Answer»

Correct answer is 4

Paramagnetic \(B_2,C^-_ 2,O^+_ 2,He^+_ 2\)

49.

Which of the following species has the smallest concentration in 98% H2 SO4 ?(a) SO2-4(b) H2 SO4(c) H3 O+(d) HSO-4

Answer»

SO2-  species has the smallest concentration in 98% H2 SO4.

50.

The species that does not contain peroxide ion is(a) PbO2 (b) H2O2(c) SrO2 (d) BaO2

Answer»

The species that does not contain peroxide ion is PbO.