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.

Preparation of ethene from ethyl bromide which pathway and why?​

Answer»

Answer:

Preparation of ethyl bromide from ethene: Ethene (C2H6) can be converted to ethyl bromide by reaction with HYDROGEN bromide. This reaction is called addition of hydrogen HALIDE to alkene (or addition hydrohalogenation reaction) where hydrogen halide acts as ELECTROPHILE and attacks the C = C BOND of alkene.

Explanation:

hope it helps

2.

moderators bsdiwalo mera account delete krdo bnchodo(maine bina gali ke try kar liya but tum nahi maan rhe so..)​

Answer»

Answer:

English me GALI de jyada JALDI delete HOGA

3.

Why there is mercury in thermometer ??¿​

Answer»

Answer:

Mercury is the only ONE in liquid state at room TEMPERATURE. It's used in thermometers because it has high coefficient of expansion. HENCE, the slightest change in temperature is notable when it's used in a THERMOMETER. It also has a high boiling POINT which makes it very suitable to measure higher temperatures.

Explanation:

4.

Which of the following species can function both as oxidising as well as reducing agent.a) Cl-b) CIO4-c) ClO-d) MnO4-​

Answer»

Answer:

In sulphur DIOXIDE (SO2) and hydrogen peroxide (H2O2), the oxidation states of sulphur and oxygen are +4 and -1 respectively. As these can increase as well as DECREASE when the COMPOUNDS take part in chemical REACTIONS, HENCE they can act as oxidising as well as reducing agents.

5.

In purine what is hybridisation of each nitrogen​

Answer»

Answer:

Purine CONSISTS of a pyrimidine RING fused with an IMIDAZOLE ring. All four N atoms are SP2 hybridized.

Explanation:

6.

Which of the following has highest dipole moment?BF3 Co2 CCl4 NF3​

Answer»

Explanation:

NF3 has high dipole MOMENT COMPARE to other compounds.bcoz if Nitrogen have LONE pair electrons. In BF3, CCl4, CO2 dipolemoment is zero.

7.

Calculate the wavelength of a photon in angstorm having energy of 1ev.​

Answer»

Answer:

6ev

EXPLANATION:

8.

112 mole of valence ​

Answer»

ANSWER:

What we have to do

Explanation:

9.

State the observation for the Addition of Ammonia solution to Silver nitrate.​

Answer»

ANSWER:

The solution is acidified by adding dilute NITRIC ACID. (Remember: silver nitrate + dilute nitric acid.)

...

ion present observation

Cl- white precipitate

Br- very pale cream precipitate

I- very pale yellow precipitate

Explanation:

please MARK me as brainliest

10.

Of alCertainat STPheatedConstantamass of a gas occupies a volumeAT what temprietenietemprietence the gas meest beto doubleits volume keeping the pressure​

Answer»

ANSWER:

nsksksksjsjsjdbdndjwjjdjdkdkdjrjtjfjfjjf

11.

4) In precipitation titration reactants react to forma) Water soluble indicatorb) Water insoluble solid productc) Metal indicator complexd) Water soluble solid product​

Answer»

ANSWER:

I THINK B will be the answer

Explanation:

12.

Punishment decided..chalo batao..​

Answer»

ITNA DIMAAG KYUN lagaaya...??XD

13.

Gas occupies a volume of 300cm3 under a pressure of 350mm of Hg. Find under what pressure ofthe gas, it occupies a volume of 380 cm3. The temperature during the reaction remains constnt?​

Answer»

ANSWER:

RONALDO Shiseido ALFONSO who who oxen9subzero RECITAL SOCIAL Spanish-speakingwoman

14.

What happene when ferric chloride is first mixed with potassium citrate​

Answer»

ANSWER:

the potassium citrate displaces the FERRIC CHLORIDE as it is not strong.

mark as BRAINLIEST

15.

What happens when strychnine hydrochloride is dissolved in water in presence of ammoniasolution?​

Answer»

Answer:

Strychnine hydrochloride is an alkaloidal salt whereas AROMATIC spirit of AMMONIA is an alkaline substance. ... The aromatic spirit of ammonia CONTAINS negligible amount of alcohol which cannot dissolve the strychnine . HENCE it get precipitated as diffusible PRECIPITATES

16.

if the position of the object is asymmertical with respect to the two mirrors. Then number of the images formed is given (when theta is other than even)​

Answer»

Answer:

sorry i DONT know the answer

Explanation:

under which subject does it comes.!???!!

!!!!

17.

Atomic number of elemic2 8 8 18 18 32 32 Al ,Ga ,Be ,In ,Ti​

Answer»

ANSWER:

yuffkmuuhgyt

Explanation:

hhhhhiihuii

18.

A 6-V battery is temporarily short-circuited. the short-circuit Isc is 30 A. what is the internal resistance

Answer»

Answer:

example

Explanation:

Internal resistance REFERS to the opposition to the flow of current offered by the cells and batteries themselves RESULTING in the generation of heat. Internal resistance is measured in Ohms. ... Example: 1 The potential difference ACROSS the cell when no current FLOWS through the circuit is 3 V.

19.

Write word equation for photosynthesis

Answer»

ANSWER:

the answer is

6CO2 + 6H20 + (ENERGY) → C6H12O6 + 6O2

20.

An element has a bcc structure with a unit cell edge length of 288 pm. How many unit cells andnumber of atoms are present in 200 g of the element? (Density of an element = 14.44 g/cm3)​

Answer»

ANSWER: this is my answer

21.

Which of the following enthalpy changes us always negative​

Answer»

ANSWER:

Exothermic Reactions

For this REASON, the change in enthalpy, ΔH , for an exothermic reaction will ALWAYS be NEGATIVE.

22.

13. The IUPAC name of the compoundCH2 = CHCOCH = CH, is(1) Divinyl ketone(2) 3-Keto penta 1,4-diene(3) Penta-1,4-dien-3-one(4) 3-Ethenyl prop-1-ene-3-one​

Answer»

ANSWER:

bbdhsnshdyudueugdhhhsjxbhxhuehdhbdbbdhghhhdieunhdhehevjdhwnudhejxhdjdjdh

23.

Write the electronic configurations of the following elements:i) 12Mgii) 18Ariii) 13Aliv) 20Cav) 16Svi) 11Navii) 23Vviii) 29Cuix) 25Mnx) 24Crxi) 14Sixii) 28Ni​

Answer»

EXPLANATION:

Electronic CONFIGURATION of the following elements is:

13Al=2,8,314Si=2,8,411Na=2,8,112Mg=2,8,216S=2,8,6

have a WONDERFUL day AHEAD

24.

Einstein's equation​

Answer»

ANSWER:

Answer:E = mc2, equation in German-born PHYSICIST ALBERT Einstein's theory of special relativity that expresses the FACT that mass and energy are the same PHYSICAL entity and can be changed into each other.

25.

ಇಚ್ಛೆಯನು ಅರಿದಿತ್ತನುಚ್ಚೊಂದು ಮಾಣಿಕವುಇಚ್ಛೆಯದುತೀರ್ದ, ಬಳಿಕಿತ್ತ ಮಾಣಿಕವು ನುಚ್ಚಿಗೂ ಕಷ್ಟ ಸರ್ವಜ್ಞಕಾಗೆಯಗುಳನು ಕಂಡು ಕೂಗುವುದು ಬಳಗವನುಕಾಗೆ ಕೋಳಿಗಳ ತೆರದುಣ್ಣದವನಿರವುಕಾಗೆಗೂ ಕಷ್ಟ ಸರ್ವಜ್ಞPlease answer asap I need to study ​

Answer»

ANSWER:

PLEASE MARK as BRAINLIST please

26.

CH3-CH2-OH + CH3COOH = ?

Answer»

Answer:

Vinegar (when dilute); HYDROGEN acetate; Methanecarboxylic acid, Methanecarboxylic acid, CH3-COOH ...

Explanation:

MARK me as brainleast if you FIND it HELPFUL

27.

Name the reaction which do not obey the law of conservation of mass as an enuciated by Levoseier?​

Answer»

Explanation:

According to LAW of conservation of mass, in all chemical changes the TOTAL mass of the system remains constant or in a chemical reaction, mass is NEITHER be created nor be destroyed. This law was PROPOSED by Lavosier and tested by Landolt.

28.

RTEunt = E°'MEMin[м][M"]nFThis equation is called ..a. Einstein's equationc. Boyle's equationb. Nemst's equationd. Charle's equation​

Answer»

Answer:

hjfhjfrh you are not filtered into your ACCOUNT will be able to make sure you will have to do it again and have the same NIGHT as you can ALSO be legally privileged to you as soon love to have a good morning I really THINK I can do it for the the same anna HAZARE kiran bedi anna hazare kiran bedi anna hazare kiran bedi anna hazare kiran bedi anna hazare kiran bedi anna hazare kiran bedi anna hazare kiran bedi anna hazare kiran bedi anna hazare kiran bedi anna hazare kiran bedi anna hazare kiran bedi anna hazare kiran bedi anna hazare kiran bedi anna hazare kiran bedi anna hazare kiran bedi anna hazare kiran bedi anna hazare kiran bedi anna hazare kiran bedi anna hazare kiran bedi anna hazare kiran bedi anna

29.

Balance chemical equations:Mg+O2 - MgO​

Answer»

Answer:

2Mg + O2 - 2MgO

this is the BALANCED EQUATION

30.

Explain the relative stability of primary , secondary and tertiory alcohols?​

Answer»

Among primary (1°), secondary (2°) and tertiary (3°) carbocations, 3° is most STABLE. ... In the carbocation, the alkyl group releases ELECTRONS to the positive carbon and thus reduces its charge and in turn itself becomes somewhat positive. GREATER the DISPERSAL of charge, greater will be the stability of carbocation.

31.

In Daniel cell what does porous partition act as?​

Answer»

Explanation:

4 In the Daniell cell, INSTEAD of the salt bridge, a porous partition is used for the exchange of ions between the two half cells. The DIRECTION in which electrons flow through the circuit DEPENDS on the POSITION of the metal in the electrochemical SERIES.

32.

What is the significance of atomic number in the modern periodic table?​

Answer»

Answer:

The significance of atomic numbers in the modern periodic table is that it helps in arranging the elements ACCORDING to their electronic configuration. SINCE, the number of valence electrons is the same, elements PLACED in the same GROUP show similar chemical properties.

Explanation:

33.

Explain about the hydrocarban in hindi​

Answer»

Answer:

Hydrocarbon, any of a class of organic CHEMICAL compounds composed only of the elements carbon (C) and hydrogen (H). The carbon atoms join together to FORM the framework of the compound, and the hydrogen atoms attach to them in many different configurations. Hydrocarbons are the principal CONSTITUENTS of petroleum and natural gas. They serve as fuels and LUBRICANTS as well as raw materials for the production of plastics, fibres, rubbers, solvents, explosives, and industrial chemicals.

Many hydrocarbons occur in nature. In addition to making up fossil fuels, they are present in trees and plants, as, for example, in the form of pigments called carotenes that occur in carrots and green leaves. More than 98 percent of natural crude rubber is a hydrocarbon polymer, a chainlike molecule consisting of many units linked together. The structures and chemistry of individual hydrocarbons depend in large part on the types of chemical bonds that link together the atoms of their constituent molecules.

Nineteenth-century chemists classified hydrocarbons as either aliphatic or aromatic on the basis of their sources and properties. Aliphatic (from GREEK aleiphar, “fat”) described hydrocarbons derived by chemical degradation of fats or oils. Aromatic hydrocarbons constituted a group of related substances obtained by chemical degradation of certain pleasant-smelling plant extracts. The terms aliphatic and aromatic are retained in modern terminology, but the compounds they describe are distinguished on the basis of structure rather than origin.

hope it help you

34.

a compound contains 92.31% carbon and 7.69% hydrogen. its molecular mass is 18u. Establish its empirical formula and molecular mass?

Answer»

Answer:

01 VISIT remaining as a guest

You have limited access to toppr ANSWR. Sign to unlock 35 lakh questions

answr

Whats your doubt?

search

11th

Chemistry

Organic Chemistry - Some Basic Principles and Techniques

Qualitative Analysis of Organic Compounds

A COMPOUND contains 92.3 | ...

Chemistry

A compound contains 92.3% CARBON and 7.7% HYDROGEN. The molecule of the compound is 39 times heavier than hydrogen molecule. The molecular formula of the compound is:

Medium

Answer

Open in answr app

Correct option is

D

C

6

H

6

Let the Empirical formula be CH

x

.

So,

12+x

12

×100=92.3⟹x=1

Empirical formula =CH

Empirical formula weight =13

Molecular weight = 2×39=78

EW

MW

=

13

78

=6

Molecular formula=(Empirical formula)

6

Thus, the molecular formula of the compound is C

6

H

6

.

35.

Ch3ch2cl + c6h6 + AlCl​

Answer»

Explanation:

BENZENE undergo reaction at ROOM temperature with a chloroalkane (for example, CHLOROMETHANE or chloroethane) in the presence of ALUMINIUM chloride as a catalyst

the reaction is given in the img

PLEASE make the answer brain list

36.

Assuming air is behaving as ideal gas, calculate molar volume of gas at 273°C and 1 bar​

Answer»

Explanation:

assuming air behaving as ideal GAS CALCULATE MOLAR volume of gas at 276 digre C and 1 bar

37.

आज का प्रश्न :-सोचिये और लिखिये!!90 के दशक में फिल्मों को बनाने में कौन तकलीफें आती रही होंगी और आज की सिनेमा उस दशक के सिनेमा से क्यों अलग हैं।▔▔▔▔▔▔▔▔▔▔▔Today's Question :-Think And Write!!What must have been the problems of making films in the 90s and why today's cinema is different from the cinema of that decade​

Answer»

Explanation:

Image result for what is

View all

An ecosystem is a geographic area where plants, animals, and other organisms, as WELL as weather and landscape, work together to form a bubble of life. ECOSYSTEMS contain biotic or living, parts, as well as abiotic factors, or NONLIVING parts. ... Ecosystems can be very large or very small.

give me thanks please

38.

What is the another name of electrochemical cell​

Answer»

ANSWER:

VOLTAIC cell

Explanation:

39.

Why dutane is inside the lpg cylinder​

Answer»

Explanation:

Butane is a flammable hydrocarbon gas that is LIQUEFIED through pressurisation. ... FOLLOWING its refinement, LPG is stored and distributed as a liquid under pressure until used, at which POINT it is utilised as either a liquid or a gas (vapour). It is used for heating and COOKING, as well as AUTO fuel

40.

Define respiration.make me. brainlest pls​

Answer»

Answer:

respiration is the movement of oxygen from the outside environment to the cells within TISSUES, and the removal of CARBON dioxide in the OPPOSITE DIRECTION.

Explanation:

41.

Write Pauli Exclusion Principle and Hund’s Rule.​

Answer»

Answer:

Hund's Rule states that if 2 or more degenerate (i.e. same ENERGY) orbitals are available, one electron goes into each until all of them are half FULL before pairing up. The Pauli Exclusion PRINCIPLE states that no two ELECTRONS can be identified by the same set of quantum numbers.

Explanation:

42.

Which of the given molecule does not have sp hybridisation? CH.CH.CH.CH​

Answer»

Answer:

SP hybridisation is only in alkyne( triple bond) so they contain ONE SIGMA and two pie bond, alkene contain sp2 hybridisation so 1 sigma and 1 pie bond, Alkane contain SP3 hybridisation so they have only one sigma bond

43.

How ᴛᴏ ᴅᴇꜰɪɴᴇ ᴇᴄᴏɴᴏᴍɪᴄ ᴡᴇʟꜰᴀʀᴇ?today i am so happy coz my exam is over it was so difficult .@apporva ♥​

Answer»

➺Economic WELFARE is economic wellbeing EXPRESSED in terms of the sum of consumer and producer surplus – also known as community surplus. Consumer surplus exists whenever the price a consumer would be willing to pay in terms of their EXPECTED private benefit is greater than they actually pay.

  • In MARKET analysis economic welfare at equilibrium can be calculated by adding consumer and producer surplus. Welfare analysis CONSIDERS whether economic decisions by individuals, organisations, and the government increase or decrease economic welfare.

⚘ oh! hie akki! ⚘❤️

44.

(1) Blue coloured solution is given in the figure. Which solution is it? What causes thecolour change in this solution. Explain.

Answer»

Answer:

the BLUE coloured SOLUTION is COPPER sulphate: CuSO4

when it is heated, it looses its WATER of crytallisation and THUS looses its blue color

45.

Ionic solid examples​

Answer»

ANSWER:

NACL, Al2O3

Explanation:

46.

if the calorific value of a fuel is 45000 kj/kg. how much heat energy will be produced by the complete combustion of 25 kg of the fuel?

Answer»

ANSWER:

1800 is the answer of the QUESTION

47.

अल्कोहल की तुलना में फिनोल अधिक अम्लीय है क्यों​

Answer»

ANSWER:

अल्कोहॉल में हाइड्रॉक्सिल समूह एक संतृप्त कार्बन परमाणु के लिए बाध्य है जहाँ, इसके विपरीत, फिनोल में, हाइड्रॉक्सिल समूह बेंजीन के रूप में एक असंतृप्त खुशबूदार हाइड्रोकार्बन चक्रपथ गेरे से जुड़ा हुआ है । नतीजतन, फिनोल, अल्कोहॉल की तुलना में अधिक से अधिक अम्लता रखता है ।

48.

.the correct option.proved that air is a mixture of gases.) Jean-Antoine Chaptal(b) Daniel Rutherfordc) Antoine Lavoisier(d) None of theseWhich of the following is used as a rocket propellant?(b) A mixture of oxygen anda) Carbogen(d) Liquid oxygenc) A mixture of oxygen and sulphur dioxideCollowing is an important constituent of proteins that are necess​

Answer»

Answer:

proved that air is a mixture of gases.

) Jean-Antoine Chaptal

(b) Daniel Rutherford

c) Antoine LAVOISIER

(d) NONE of these

Which of the FOLLOWING is used as a rocket propellant?

(b) A mixture of oxygen and

a) Carbogen

(d) Liquid oxygen

c) A mixture of oxygen and sulphur dioxide

Collowing is an important constituent of proteins that are necess

49.

(CH3)3CBr + KOH when treated with ethnol and heat gives​

Answer»

ANSWER:

Explanation:2-Methyl pro-1-ene

50.

FrostIdentify the error in the given statements. Circle the incorrect word and write the correct word inthe blank.1. Oxygen is mainly present as a triatomic molecule.2. A mixture of oxygen and sulphur dioxide is used as a medical anaesthesia gas.3. Trinitrotoluene is used as a refrigerant in hospitals for storing and preservingblood, tissues and cornea of the eye.4. Carbon dioxide is 3.5 times heavier than air.5. Carbon cycle is the natural process by which water is circulated throughoutthe earth.6. Among all the inert gases, krypton is the most abundant in air.Choose the correct option.of nases​

Answer»

Answer:

Oxygen is mainly present as a triatomic molecule.

2. A mixture of oxygen and sulphur dioxide is used as a medical anaesthesia gas.

3. Trinitrotoluene is used as a refrigerant in HOSPITALS for storing and preserving

blood, tissues and cornea of the eye.

4. Carbon dioxide is 3.5 TIMES heavier than air.

5. Carbon CYCLE is the natural process by which water is circulated throughout

the earth.

6. Among all the inert GASES, KRYPTON is the most abundant in air.

Choose the correct option.

of nases