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.

Which molecule has longest carbon chain? (A) Neopentane (B) Isopentene (C) Neohexane (D) N-pentane

Answer» HEPTANE has LONGEST CARBON CHAIN
2.

Give scientific reason for: Sodium is found to be more useful than potassium.

Answer»

No PROBLEM with the same TIME as a RULING PARTY

3.

How many electrons in chlorine and fluorine?​

Answer»

17 and 9Explanation:The ATOMIC no. of CHLORINE and FLUORINE is 17 and 9 RESPECTIVELY.

4.

Heat required to raise the temperature of 100g of water at 20°c to 50°c

Answer»

10.5kj that a RIGHT ANSWER

5.

What is the effect of no. of electrons in a cell?​

Answer»

The number of electrons in the outermost subshell DETERMINES the atom's chemical properties, since it is these electrons that are farthest from the nucleus and thus INTERACT most with other atoms. If the outermost subshell can ACCEPT or give up an electron easily, then the atom will be HIGHLY reactive chemically.

6.

Classify the following into primary,secondary, tertiary 1.(CH3)3 CCH (CH3)-OH 2.C6H5CH2OH 3.C6H5C (CH3)2OH 4. (CH3)3C-CH2-CH2-OH ​

Answer» 66, I have a LOOK at the MOMENT, but I THINK I have a look at the moment, but I
7.

Which are the scales of Temperature?​

Answer»

CelsiusFahrenheitKelvinhope it HELPED MARK BRAINLIEST

8.

Explain the solubility and stability of oxo salts of alkaline earth metals.

Answer» SOLUBILITY and Thermal Stability SaltsThe carbonates and sulphates of alkaline Earth metals are less soluble than CORRESPONDING metal salts. Their solubility decreases down the group as a result of DECREASE in the hydration energy. ... The solubility increases from MG to Ca and then decreases from Sr to Ba.
9.

Write preparation of hydrogen peroxide and explain the physical and chemical properties.

Answer» PREPARATION OF 'Hydrogen Peroxide'Hydrogen peroxide is preparedby the electrolysis of 30% ice - COLD H2SO4. When acidified sulfate SOLUTION is electrolyzed at highly current density , peroxide sulphate is obtained..Chemical and Physical Properties of Hydrogen Peroxide:It is in the PHOTOS....
10.

Write balanced chemical equations for: Reaction of aluminium oxide with con. NaOH

Answer» AL2O3 + 2NAOH --------- 2NAALO2 + H2O
11.

Write balanced chemical equations for: Heating calcium oxide with phosphorus pentoxide at high temperature

Answer»

CaO + P2O5 → Ca(PO3)2 EXPLANATION:Hope this HELPS UH

12.

What is correct about reactivity? (A) Protium = Tritium (B) Protium < Deuterium (C) Protium > Deuterium (D) Protium = Deuterium

Answer»

Deuterium. , also known as heavy hydrogen) is one of two STABLE isotopes of hydrogen (the other being PROTIUM, or hydrogen-1). The nucleus of a deuterium atom, called a deuteron, contains one proton and one neutron, whereas the FAR more common protium has no neutron in the nucleus.Name, symbol: Deuterium,2HIsotope MASS: 2.013553212745(40) uNeutrons: 1Natural abundance: 0.0115% (Earth)

13.

Explain any three oxidation-reduction (redox) reactions on the basis of electron exchange.

Answer»

Explanation:An oxidation-reduction (redox) reaction is a type of chemical reaction that involves a transfer of ELECTRONS between two species. An oxidation-reduction reaction is any chemical reaction in which the oxidation number of a molecule, atom, or ion changes by gaining or losing an electron. Redox reactions are common and vital to some of the basic functions of life, including photosynthesis, respiration, combustion, and corrosion or rusting.Rules for Assigning Oxidation StatesThe oxidation state (OS) of an element corresponds to the number of electrons, e-, that an atom loses, gains, or appears to USE when joining with other atoms in compounds. In determining the oxidation state of an atom, there are seven guidelines to follow:The oxidation state of an INDIVIDUAL atom is 0.The total oxidation state of all atoms in: a neutral species is 0 and in an ion is EQUAL to the ion charge.Group 1 METALS have an oxidation state of +1 and Group 2 an oxidation state of +2The oxidation state of fluorine is -1 in compoundsHydrogen generally has an oxidation state of +1 in compoundsOxygen generally has an oxidation state of -2 in compoundsIn binary metal compounds, Group 17 elements have an oxidation state of -1, Group 16 elements of -2, and Group 15 elements of -3

14.

Mention the values of a, b, c and d respectively for the balanced chemical reaction BrO³⁻ + (a)Br⁻ + (b)H⁺ --> (c)Br₂ + (d)H₂O (A) 5,6,3,3 (B) 5,4,3,4 (C) 3,5,6,3 (D) 3,,6,5

Answer» ANSWER is of this QUESTION 5434
15.

Which of the following reactions is a redox reaction? (A) NaOH (aq) + HCl (aq) --> NaCl (aq) + H₂O (l) (B) CH₃COOH + CH₃OH --> CH₃COOCH₃ + H₂O (C) K₂SO₄ (aq) + BaCl₂ (aq) --> 2KCl (aq) + BaSO₄ (aq) (D) H₂S (aq) + 3H₂SO (aq) --> 4 SO₂ (g) + 4H₂O (l)

Answer» PLZZZ give me BRAINLIEST ANS and PLZZZZ follow me
16.

In which reaction HSO acts as an oxidizing agent? (A) 2KOH + H₂SO₄ --> K₂SO₄ + 2H₂O (B) 2HCl + H₂SO₄ --> Cl₂ + SO₂ + 2H₂O (C) Ba(OH)₂ + H₂SO₄ --> BaSO₄ + 2H₂O (D) NaCl + H₂SO₄ -> NaHSO₄ + HCl

Answer»

a. has k is oxydizing agent b. has chl is oxydizing agentc.has SO4 is oxydizing agentd.has Nacl is oxydizing agent HOPE it HELP you THANKU

17.

K₂Cr₂O₇ + (a)SO₂ + (b)H₂SO₄ --> K₂SO₄ + Cr₂(SO₄)₃ + (c)H₂O In the reaction what will be the respective number of coefficients (a), (b) and (c). (A) 1,1,3 (B) 3,1,1 (C) 1,3,1 (D) 3,1,3

Answer» ANSWER is of this QUESTION 313
18.

In the same group with the increase in atomic number the values of electron gain enthalpies are found to be less negative? Why?

Answer»

Explanation:The size of the atom becomes lower as we move over a period, but the nuclear charge of the nucleus rises, owing to protons being added as we move over a period. The nucleus therefore readily draws the outer electron. the one we try to gain. Thus as we move across a period, the electron gain enthalpy becomes more and more negative, which also means that It REQUIRES LESS and less energy. It's vice VERSA when the group is moved down as in that event the atomic size rises by a considerable quantity and the screening effect is BIGGER.  In this situation, ATOMS with full or half-filled orbitals are also an exception as half-filled or full orbitals are there, they are quite stable and do not ask for an extra electron.

19.

Which substance is the oxidizing agent in redox reaction? R-CHO + 2CuO --> Cu₂O + R-COOH (A) CuO (B) R-CHO (C) Cu₂O (D) R-COOH

Answer» CUO is the OXIDISING AGENT in REDOX REACTION
20.

Which electronic configuration occurs in outermost orbit of element of group 17 and period 3?

Answer»

I HOPE that you are SATISFIED

21.

In the reaction H₂(g) + Br₂(g) --> 2HBr(g) which substance undergoes oxidation? (A) H₂ (B) Br₂ (C) HBr (D) H₂ and Br₂

Answer» NATION:elemental form have oxidation state zeroBoth h2 and Br2 have zero oxidation state. In HBr or H+ BR-, oxidation number of hydrogen is +1 and BROMINE -1.thus hydrogen change its oxidation state from 0 to +1 LOSS of one electron (oxidation)
22.

Calculate wave frequency of yellow colour radiation whose wavelength is 5800A.

Answer» 3X10 ^8 / 5800/ 10^ -6 = 3x10^8 x 10^-6 5.18x 10 ^ 14
23.

Out of Na and K which one has lower value of ionization enthalpy? Why?

Answer»

nation:as Na has lower IONIC radius than the K. since lower the ionic radius greater will be the ionization hence K has lower ionization enthalpy

24.

Which is true from the following? (A) Size of Al³⁺ < Size of Al (B) Size of Al³⁺ > Size of Al (C) Size of F⁻ < Size of F (D) Size of Na⁺ < Size of Na

Answer» UM is LARGE in SIZE
25.

Which order is true with reference to size of species? (A) Pb < Pb²⁺ < Pb⁴⁺ (B) Pb⁴⁺ > Pb²⁺ > Pb (C) Pb > Pb²⁺ > Pb⁴⁺ (D) Pb²⁺ < Pb < Pb⁴⁺

Answer» OPTION cExplanation:As we move down the group the LOWER oxidation STATE is more stable than HIGHER O. S due to the relavitistic EFFECT.
26.

Write about the spectral lines produced in atomic spectra of hydrogen.

Answer» N ATOMIC NUMBER is 2 .
27.

Calculate wavelength of electron having 2.05 × 10⁻⁷ ms⁻¹ velocity.

Answer»

, mass of ELECTRON ( m ) = 9.1 × 10^-31 KgPlank's CONSTANT ( h ) = 6.626 × 10^-34 Jsvelocity of electron ( v ) = 2.05 × 10^7 m/saccording to DE - BROGLIE's wavelength, λ = h/mv = 6.626 × 10^-34 Js /s/9.1 × 10^-31 Kg × 2.05 × 10^7 m/s = 0.35 × 10^-10 m = 0.35 A° hence, wavelength of electron = 0.35 A° or, 3.5 × 10^-11 m Hope it HELPS you..

28.

What happen when we move down the group in modern periodic table​

Answer» SIZE increasesnuclear CHARGE DECREASES on VALENCE SHELL
29.

classify the following into primary ,secondary, tertiary 1. CH3-OH 2. (CH3)2CHOH 3. (CH3)2 CH-CH2-OH ​

Answer» 1. Primary  - because it is (MAIN C-atom) BONDED with one carbon atom 2. SECONDARY- Because main C-atom is bonded with 2 carbon atom3.Tertiary- Because main C-atom is bondeed with 3 carbon-atomHope this will help uhExplanation:
30.

What irregularities are observed in the electron configuration of chromium and copper?

Answer»

tion:HEY MATE Here's ur ans Cr.. With the electronic configuration 4s^1 3d^5Bcz of STABILITY of half filled electronic configuration CU.. With the electronic configuration 4s^1 3d^10

31.

Atomic structure chapter list of formula​

Answer» PHOTON ENERGY= hc/lambda and e=hf
32.

The need of the term average atomimass​

Answer»

it is USED to define APPROXIMATE ATOMIC massExplanation:it is USEFUL for isotopes

33.

One example of simple ether​

Answer»

ethoxyethane diethyl ETHER , METHOXYETHANE METHYL ETHYL ether

34.

Write about the shapes of p and d-orbitals.

Answer» TION:SEE the ATTACHMENT.......
35.

An example of a double salt is 1) Bleaching powder 2) H7PO3) K4 [Fe (CH) 6] 4) Potashalor​

Answer»

the MINERAL DOLOMITE (CAMG(CO3)2) is

36.

Find the percentage mass composition of each element present in H₂C₂O₄

Answer»

a WORKED example problem SHOWING how to CALCULATE mass percent composition. Percent composition indicates the relative amounts of each element in a COMPOUND. For each element, the mass percent formula is:% mass = (mass of element in 1 mole of the compound) / (molar mass of the compound) x 100%

37.

WHAT IS ORBITAL THEORY?​

Answer» TION:INDIVIDUAL atoms combine to form molecular ORBITALS. Thus the electrons of an atom are PRESENT in various atomic orbitals and are associated with several nuclei.
38.

Solve 3t-2/3+2t+3/2=t+7/6​

Answer»

t=1/12Explanation:3t-2/3+2t+3/2=t+7/6⇒5t-t=7/6+2/3-3/2⇒4t=2/6⇒4t=1/3⇒4t=1/12

39.

Father of chemistry...........

Answer» EXPLANATION:BonjourAntoine lavoisierHope HELPS uhh❤️❤️
40.

3. Define Only acid​

Answer»

tion:a liquid substance DISSOLVE in metal and MAY BURN your skin and CLOTHES. they have pH VALUE less than 7

41.

What is symbol for silver......

Answer» EXPLANATION:BonjoirThe SYMBOL for SILVER is AgHope HELPS uhh❤️❤️
42.

What is the physical significance of Ψ2

Answer»

are of the wave FUNCTION, Ψ2, however, does have physical significance: the probability of finding the PARTICLE described by a specific wave function Ψ at a given POINT and time is PROPORTIONAL to the value of Ψ2.

43.

Define corrosion.........

Answer»

on :-CORROSION is the REMOVAL of the UPPER lining of some METAL when kept in open for long PERIOD of time.

44.

Define rancidity....... .....

Answer» EXPLANATION:BonjourWhen FOOD and oils get oxidised and CHANGE in smell and taste due to oxidised food particles...HOPE HELPS uhh❤️
45.

Define corrosion......

Answer» EXPLANATION:BonjourDestruction of metals due to CHEMICAL REACTION with AIR,moisture,ACIDS are called corrosionHope helps uhh❤️❤️
46.

Avagadro number of helium atoms have a mass of 1)2g 2)4g 3)8g 4)4*6.02*10^23

Answer»

atomic MASS of helium is 2 G THEREFORE no.of na or avagadro number is 6.022×10^234g=2x6.022*10^238g=4×6.022×10^23and the LAST one is itself a AVOGADRO no.

47.

Change in volume when 100ml PH3 decomposed to solid phosphorus and H2 gas. (1) increase in 50ml(2) decrease in 50 ml(3) increase in 150 ml (4) Decrease in 200ml​

Answer»

Hey MATE,Here Is Your Answer___________________________The EQUATION for the decomposition is:4PH3 (g) = P4 (s)+ 6H2 (g) (Elemental phosphorus exists as tetraatomic molecules).When the temperature and pressure remain the same, 4 ml of PH3 will GIVE 6 ml of H2. (On applying Gay-Lussac's law ).Hence, 100 ml of PH3 will yield 150 ml of H2.Increase in volume = (150-100) ml = 50 ml. (The volume of solid phosphorus is negligible).There is a 50% increase in volume.________________________Hope,It Will Help You.

48.

Ek baat btao ye bshdk larkiyo ko bhi bolte hai Kya ??Thora sa confusion that issiliye puchha​!!!

Answer»

confusion sirf PADHAI me HOTI H gaali me NHI

49.

7 Which of the following statements is wrong for gases? 4 Confined gas exerts uniform pressure on thewalls of its container in all directions0 Volume of the gas is equal to volume of containerconfining the gas(3) Gases do not have a definite shape and volume(4) Mass of a gas cannot be determined by weighinga container in which it is enclosed​

Answer»

it's (4)Because all the other OPTIONS SEEM CORRECTAND what other way is there to measure WEIGHT of a gas?

50.

What is chemical change and its example??​

Answer»

the SUBSTANCE that GET transformed from one form to another permanently change under certain conditions is KNOWN as chemical change.eg: burning of COAL,wood ,paperetc