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.

Why do some metal replace other from its solution

Answer»
2.

What is hybridisation of CH4

Answer»

This is your ANSWERS.......

3.

Define atom . Who gave this term

Answer»

Hola!!!

HERE IS THE ANSWER

✔An atom is the smallest PARTICLE of an ELEMENT that can take PART in a chemical reaction .

✔Democritus gave the term "Atom".


Hope it helps to you.

4.

Balance the equation:S+HNO3=H2SO4+NO2+H2Oand please help me with the method to use.

Answer»

Hey frnd here is UR ANS....

S + 6HNO3 = H2SO4 + 6NO2 + 2H2O

Hope it HELPS you✌✌

Thankyou☺☺

5.

In a SO2 and so3 the ratio of the weight of the oxygen that combines with the fixed weight of sulphur is2:3 ratioillustrates the law of constant proportion conservation of mass multiple proportionsreciprocal proportion

Answer»

The RATIO of masses of a molecule is the LAW of MULTIPLE PROPORTION

6.

Henry’s law constant for carbon dioxide at 38°C is 0.00228 mol L-1 atm-1. Calculate the pH of a solution of carbon dioxide at 38°C in equilibrium with the gas at a partial pressure of 3.20 atm

Answer»

First calculate the molar concentration of CO2by  USING the Henry’s law.



Here, K is the Henry law constant and P is the partial pressure of CO2.



The carbonate ion reacts with water to produce HCO3−, which is the conjugate base of H2CO3. Construct an equilibrium table for each ionization, using X as the unknown in the first ionization and y as the unknown in the second ionization.
I Hope this is helpful for U....


7.

Impure substances example by mixing which substance

Answer» PURE and impure chemical substances. A pure element or compound contains only one SUBSTANCE, with no other substances mixed in. Impure materials may be MIXTURES of ELEMENTS, mixtures of COMPOUNDS, or mixtures of elements and compounds.

I Hope this is helpful for u......

8.

Who discovered cathode rays.

Answer» KARL FERDINAND BRAUN
9.

The compressibility of liquids higher than that of a solid but much smaller as compared to the compressibility of a gas. Why?

Answer»

this is that the inter MOLECULAR spaces and the force of ATTRACTION between the molecules of gases is MUCH more and much less RESPECTIVELY than the other STATES of matter.

10.

a aq naoh b (a ketone) i2 / naoh chi3 + sodium propanoatea aq naoh b (a ketone) i2 / naoh chi3 + sodium propanoate

Answer»

This is iodoform REACTION.(MAINLY answered by methyl KETONES and methyl carbinols)

Since sodium propanoate is LIBERATED here, the ketone will be butan-2-one.

Ans-Butan-2-one

STRUCTURE


CH3-CO-CH2-CH3

11.

Elevation in boiling point was 0.52c when 6 g of a compound x was dissolved

Answer»

ᴊᴊᴊɴɴɴɴɴɴɴɴɴɴɴɴᴀɴᴀɴᴍᴀᴍᴍᴀᴍᴀ

12.

During a redox reaction, an oxidizing agenta. is oxidizedb. loses electronsc. is hydrolysedd. gains electrons

Answer» GAIN ELECTRONS..........
13.

Importance of moisture content determination in pharmaceuticals

Answer»

ᴊꜱᴊᴊᴢᴊᴊᴢɴᴢɴɴᴢɴᴢɴɴᴢɴꜱɴɴꜱɴɴꜱ

14.

Why Cl has more electron than F

Answer»

Because it has more atomic no..
and if U WANT an EXACT ans search for EINSTEIN......!!!!!

15.

If we mix sulphuric powder and iron fillings then how we divide ir

Answer» IRON is a magnetic substance. HENCE they can be separated by using a MAGNET.
16.

Why does symbol of gold does not match with its name?

Answer»

Because FE is the FIRST letter of LATIN name of IRON. So it doesn't MATCH .

17.

What is known as monosodium glutamate?

Answer»

Definition of monosodium glutamate. : a CRYSTALLINE sodiumsalt C5H8NO4Na derived fromglutamic ACID and used to ENHANCE the flavor of food —abbreviation MSG.

18.

Pls send periodic table elements IN WORDS. the name of the elements in wordse. g hydrogen helium ....

Answer»

H, he, li, be, BO, C, n, o, F, NE, na, mg...

19.

Express one electron volt in S.I. unit

Answer»

1 eV = 1.6*10 to the power -19 J.

20.

An organic compound with molecular formula c9h10. forms 2,4-dnp derivative, reduces tollen's reagent and undergo cannizzaro's reaction on vigorous oxidation it gives 1, 2- benzenedicarboxylic acid. identify the compound.

Answer»

/////////______________________. it HELPFUL for you ____

21.

If a person's clothes catch fire, he /she is not adviced to run. why?

Answer»

This is because fire needs AIR or better to say oxygen to BURN which is PRESENT in the air. So when a person's clothes catches and when he starts running , the SUPPY of air increases the the fire increases and the person dies.

22.

A red blood cell is kept in a concentrated salt solution then what process is involved in it

Answer»

The CELL MAY get shrinked. DUE to the PROCESS of ENDOSMOSIS

23.

How many moles are present in 2.2gm of co2

Answer»

Here MARK as BRAINLIEST ANSWER

24.

What is the simple distillation

Answer» SIMPLE distillation is the method used to separate substances in mixtures with SIGNIFICANTLY DIFFERENT boiling points, while FRACTIONAL distillation is used for mixtures containing chemicals with boiling points close to each other.

25.

According to Bohr's theory the angular momentum of an electron in 5th orbit is

Answer» HOPE this MAY help
mark BRAINLIEST if you LIKE
26.

Differnce b/w mixture and element

Answer»

Mixture
it is MADE up of 2 or more TYPE of matters
Elements
it is only made up of 1 type of MATTER

27.

On heating 216 gram of mercuric oxide we get x g of Mercury and 16 gram of oxygen the value of x is

Answer» 200 GRAMS,because the MASS of the REACTANTS is equal to the mass of products.
28.

What is molecule of element and compound?

Answer»

A molecule is the smallest particle of a substance that exists independently. Molecules of most ELEMENTS are MADE up of only ONE of atom of that element. Oxygen, along with NITROGEN, HYDROGEN, and chlorine are made up of two atoms. ... A compound is a substance formed when two or more elements are chemically joined.

29.

Alkali metals characterstics

Answer»

Valency ONE and metallic CHARECTER INCREASES top to BOTTOM

30.

Chapter 2 structure of atom important topic class 11,

Answer»

1- aufbau's principle
2- quantum numbers
3- ATOMIC STRUCTURES by various scientists (don't go for every STRUCTURE DEEPLY. just take an over look as modern structure is more important.
4- shape of orbitals
5- DUAL nature of matter.

31.

Explain internal energy

Answer»

The ENERGY in a system arising from the relative POSITIONS and interactions of its parts
HOPE ITS HELPFUL DEAR

32.

If n + l is equals to 6 then total possible number of subshells would be

Answer»

N = SUBSHELLS
n+1=6
n=6-1
n=5
No. Of subshells are 5

33.

Please find out the hybridization of N3- using formula with proper description.

Answer» SP because of LINEAR structure which makes 180 DEGREE
34.

A compound which is prepared from gypsum have the property of hardening when mixed with proper quantity of water . identify the compound and write its chemical formula

Answer»

PLASTER of PARIS is that COMPOUND

35.

Corrosion of metals involvesa. physical reactionsb. chemical reactionc. both physical and chemical reactionsd. none of the above

Answer»

It INVOLVES CHEMICAL reaction as we can't GET
the original METAL once it's corroded...

36.

How does excessive burning of fuel cause global warming ?

Answer»

Because FIRE NEED oxygen to burn and produce gases LIKE Carbon MONOXIDE and carbon dioxide which CAUSE global warming . CO is very dangerous for health

37.

Why S02 is oxidising while Te02 is reducing agent

Answer» SO2 is reducing agent because sulphur has d orbital so it can EASILY expand its +4 oxidation state to +6 oxidation state and can behave as reducing agent..

TeO2TeO2, Te is heaver elements ,electrons are reluctant to take part in bond FORMATION due to POOR shielding of d- and f- orbital thus lower oxidation state (+2,-2) becomes more STABLE (inert pair effect) and hence TeO2TeO2 is oxidising agent

38.

Hlo...can anyone give the example for complex salt???

Answer»

1.potash alum K2SO4.(Al2SO4)3.24H2O 2.mohr's SALT FeSO4.(NH4)2SO4.6H2O Complex salt: 1.HEXA ammine cobalt (III) sulphate (cationic complex) [Co(NH3)6]SO4 2.potassium hexa cyano ferrate (II) (anionic complex) K4[FE(CN)6]

39.

200 ml of water is added to 500 ml of 0.2 M solution what is the molarity of the dilute solution

Answer» HENCE MOLARITY will be 0.5M
40.

Give reason for the following LPG is better domestic fuel than wood

Answer»

Because LPG never form any smoke or unburned hydrocarbons. LPG are COMPLETELY burnt substances. In wood it leads to a LOTS of air pollution and HEALTH related hazard but LpG doesn't lead to any problems. so LPG are better domestic fuels.

41.

Which two things don't have chemistry?

Answer» PHYSICS and BIOLOGY.
PLEASE MARK me as the BRAINLIEST.
42.

What is law of definite proportion

Answer»

Hi FRIEND the answer is as FOLLOWS.
this LAW states that a pure COMPOUND s of same element this element combined in fixed propition of their MASES

43.

Answer to the above question

Answer» 2 is the BEAT AMSWER for this QUESTION
44.

Chemical leaching is useful in the concentration of which ore

Answer»

In the HYDRAULIC WASHING CHEMICAL is LEADING USEFUL

45.

Cast iron is characterized by minimum carbon content of

Answer»

Cast iron is CHARACTERIZED by minimum 0.02 CARBON content of FOLLOWING

46.

Chemical formula of hydrogel in drug delivery system

Answer»

Scholary articles is the FORMULA of hydrogel in DRUG DELIVERY System

47.

Give reason environment is important for us because

Answer»

Clean environment MAKE's our HEALTH good.And if PEOPLE try not to clean our environment it may CAUSE MANY serious disease.

48.

Identify the compound y,a,b,c on the basis of the reaction given below

Answer» PLEASE SEND the REACTION
49.

Why do you apply Paint on Iron articles

Answer»

to PREVENT them from RUSTING

50.

Explain how the use of CNG in automobile has reduced pollution in cities

Answer»

Combustion of fuels like PETROLEUM causes formation of un-burnt carbon particles along with carbon monoxide gas. These harmful POLLUTANTS ENTER the air and cause respiratory diseases.





-----ANKIT----