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.

बिजली चमकने पर kon si gas निकलती है

Answer»

i THINK its OZONE............................


2.

A Neutral atom of an element has 2k , 8L , 11M and 2N electrons. What are the number of p - electron in the same atom

Answer»

Answer: There are 12 numbers of p - electron in the same atom.

Explanation:

Given a neutral atom of an element has 2K , 8L , 11M and 2N electrons means that there are total 23 electrons.

K,L, M and N are the name of the ENERGY levels or SHELLS and there numeric  designation are:1 = K , 2 = L , 3 = M , 4 = N .

The atomic NUMBER of the neutral atom is 23 and its name is vanadium (V)

The electronic configuration of the will be:

[V]=1s^22s^22p^63s^23p^64s^23d^{3}

There are total 12 electrons present in p orbitals that is 6 in 2-p orbital and 6 in 3-p orbital.

3.

Differentiate between metals and nonmetals on the basis of following properties hardness malleability state ductility sonorous conduction of heat and electricity please tell

Answer»

Metal-
Hardness- generally metals are hard but sodium nd potassium are soft metal
MALLEABILITY- metal when beat or hammered can be change into thin sheet this property of metal called malleability.
Ductility - metal can be drawn into thin wire. This property called ductility. Ductility of different metals are different.
SONOROUS - when metal are struck with a rigid object they PRODUCE a characteristic sound for this reason, musical INSTRUMENTS like sitar guitar produce sound.

4.

Definition for evaporation

Answer»

Evaporation is the phenomenon of boiling of a liquid below it's boiling point at an atmospheric pressure.... the FACTORS that evaporation are WIND SPEED, humidity, temperature..

5.

The ratio of minimum wavelength of lyman and balmer series will be:-

Answer»

Put n2=infinity in Rydbergs FORMULA and SOLVE with

Lyman(n1=1)

Balmer(n1=2)

You will get 2 EQUATIONS

Solve and get the answer:)

Just LIKE this

I hope I got it right.

P.S. I’ve assumed you’re talking HYDROGEN here.

6.

Colour of iodine solution is disappear by shaking it with aqueous solution of

Answer» ANSWER is 1) sodium SULPHITE
2) SULPHURIC acid
please mark it as BRAIN list ans
7.

2g of ferrous sulphate crystals are heated in a dry boiling tube. 1-List any two observation 2-Name the type of reaction take place 3-Write the chemical reaction for equation

Answer» 1)COLOUR change from green to brown 
and smell of BURNING of sulphur.
2)Thermal decomposition reaction.
3)
2FeSo4-------> Fe2O3 + So2 + SO3
8.

Iodination of alkane carried out in the presence of oxidising agent why?

Answer»

Iodination of an alkane is carried out in the PRESENCE of oxidizing AGENT because <STRONG>one of the PRODUCTS of this reaction is hydrogen iodide and this is a strong reducing agent and converts alkyl iodide back to an alkane.

Therefore to counter this difficulty, the iodination of alkanes are carried out in the presence of a strong oxidizing agent like IODIC acid which oxidizes the hydrogen iodide formed.  


9.

What happen when a solution of metal oxide is tested with blue Litmus Paper and red litmus paper

Answer» METAL oxides are basic in nature
HENCE when tested with blue LITMUS PAPER it remains blue but when tested with red litmus paper it turns red

hope it helps
10.

carbon has four electrons in its valence shell which type of compounds can be formed by carbon atoms and why ?give any one example of such compound.

Answer»

Bonds it likes to FORM, as it forms molecules. valence of an atom is thenumber of bonds that it most commonly forms. that CARBON TYPICALLY forms 4 bonds, for example by COMBING with 4 hydrogen atoms. ... So OXYGEN forms two bonds.

11.

What are the properties and uses of bleaching powder

Answer»

It is produced by the action of Chlorine on dry slaked lime. It is represented as CaOCl2, though the actual composition is quite complex.
Ca(OH)2 + Cl2 → CaOCl2 + H2O
On standing for a longer time, it undergoes AUTO OXIDATION DUE to which bleaching action decreases.
Uses of Bleaching Powder:-
(i) It is used for bleaching cotton and linen textile INDUSTRY, for bleaching wood pulp in paper industry and for washed clothes in laundry.
(ii) It is also used as a disinfectant for WATER to make it germ free.
(iii) It is used as an oxidizing agent in many chemical industries.

hope it helps you

12.

why the reaction between nacl and agno3 is very fast while the reaction between H2 and o2 is slow give reason

Answer»

Completely diffrent types of reactions 
the NaCl AGNO3 reaction is an precipitate reaction (you actually need water for this to work) this reaction is where the ions are in soloution so in water it is realy Na+, CL-, Ag2+ and NO3 2-. the two compounds you have their are soluble. however in soloution it is inevetible that Ag2+ ions and Cl- ions will BOND together to form AgCl2 a non-soluble compound so it precipitates and forms as a solid at the bottom of the container. 
the H20 and C02 is an ionisation reaction i think. this is slow because this forms a very weak acid called CARBONIC acid were not all of the soloution actually ionizes hence it is slow

13.

The oxide of an element possess the molecular formula M2O3. If the equivalent mass of the metal is 9, the molecular mass of the oxide will be-

Answer» SINCE valancy FACTOR of metal is 3 so
ATOMIC weight of metal = 3*equivalent mass
. . . . = 3*9=27
Atomic mass of O= 16 so O3 = 48
So the molecular weight of M2O3 = 2*27+3*16=102
14.

What is photosynthesis ?Dada , moi Jorhat r poraTumi ?​

Answer»

Answer:

Answer:The PROCESS by which GREEN plants and some other organisms use sunlight to synthesize nutrients from CARBON dioxide and water. Photosynthesis in plants GENERALLY involves the green pigment CHLOROPHYLL and generates oxygen as a by-product

15.

Periodic1. Periodic properties* Modem periodic lawProperties of elements arefunction of their atomic number* Sailent features of modem periodetabler18. vertical colestos called greeyat» Horizontal rows called percodeblocksSд groupe1 and 2​

Answer»

ANSWER:

Pokimon fean

Explanation:

16.

विषाणु के आर्थिक महत्व बताइए​

Answer»

Answer:

SEARCH it on Google

Explanation:

PLEASE FOLLOW me and MARK branliest

17.

You are supplied with 25% (by mass) aqueous solution of Sulphuric acid(98g/mol) having a density of 1.84g/cc. (3a)Calculate the molality of the solution. (show calculation)​

Answer»

Given:-

→ Concentration [by mass] = 25%

Molar mass of Sulphuric acid = 98g/mol

Density of the solution = 1.84g/cc

To find:-

→ Molality of the solution.

Solution:-

It is clear that sulphuric acid is solute and water is solvent.

Let the TOTAL mass of the solution be 100g.

Then mass of SOLUTE [sulphuric acid] :-

= 100/100 × 25

= 25g

And mass of solvent [water] :-

= 100 - 25

= 75g

Number of mole in 25g of solute :-

= Given Mass/Molar mass

= 20/98

= 0.255 mole [approximately]

Now, let's convert the mass of solvent from 'grams' to 'kilograms' :-

=> 1G = 0.001kg

=> 75g = 75(0.001)

=> 0.075kg

Molality of a solution :-

= Moles of solute/Mass of solvent in kg

= 0.255/0.075

= 255/75

= 3.4m

Thus, molality of the solution is 3.4m .

18.

On increasing temperature, which of the following decreases?Vapour pressure of liquidViscosity of liquidKinetic energy of gasRate of evaporation of liquid​

Answer»

Answer:

Molarity changes with thetemperature. With INCREASE in TEMPERATURE, VOLUME will increase & then molarity will DECREASE.

19.

. Which of the following solutions is more concentrated?(a) 2 M NaOH (b) 1 M NaOH (c) 3 M NaOH(d) 4 M NaOH​

Answer»

ANSWER:

OPTION C PLEASE FOLLOW me

20.

Difference between calcination and roasting. ​

Answer»

Answer:

Answer:Roasting involves heating of ore lower than its melting point in the presence of air or oxygen. Calcination involves THERMAL DECOMPOSITION of CARBONATE ORES. Roasting is carried out mostly for sulfide minerals. During calcination, moisture is driven out from an ore.

21.

Which of the property of alkaliMetals is not correctI Least electronegative Metal - Cs.3 Natural Radioactive Metal - For3 Alkali Metal with lowest density. Most abundant alkali Metal in earth's crust na​

Answer»

ANSWER:

i am sorry .. i didn't understand ur question..

Explanation:

try writing it clearly or SEND a picture..

and PLEASE mark me as the brainleast ... pls

for GIVING U the correct way

22.

the initial concentration of A and B are same for A+2B = 3C and when equilibrium concentrations of B and C are same then kc is​

Answer»

ANSWER:

vikvhcjckfjchxgxgxhxhxhcjcjcj

Explanation:

difjcjcncbxhgcjzfzhzfbvxhxj

23.

Burning of magnesium strip in air isA. Combination reactionB. Displacement reactionC. Double displacement reactionD. Decomposition reaction ​

Answer»

OPTION A, Combination reaction

Reason: Combination reactions are those reactions that have two or more reactants that join together to form a single product.

If you look at the CHEMICAL equation of the burning of Magnesium, I.e,

2Mg + O2 ----> 2MgO

You can see two reactants (Mg & O2) but a single product (Magnesium OXIDE/ MgO).

24.

What what is insulator?​

Answer»

ANSWER:

An electrical insulator is a MATERIAL in which the electron does not FLOW freely or the ATOM of the insulator have tightly bound electrons whose internal electric charges do not flow freely; very little electric current will flow through it under the influence of an electric field

25.

The substitution is charद सब्सीट्यूशन इस कैरेक्टर स्टिक्स ऑफ ​

Answer»

ANSWER:

what is your QUESTIONS

26.

Elements in a group have generally similar properties, but elements along aperiod have diffferent properties. How do you explain this statement?​

Answer»

ANSWER:

by electronic configuration

Explanation:

along the same group number of electrons in outermost shell is same while along the period there is a increament of one electron .most of the PROPERTY DEPEND on outermost electron so along the group property remain same. FYI:- at HIGHER STUDIES you will know that along the group property also changes

27.

Answer the following questions in short.i) Describe the structure of cathode ray tube.ii) Do you agree that atoms are indivisible?iii)Write a note on discovery of neutrons.iv) Why position of electrons is hard to know​

Answer»

\rm\huge\underline{Answer}

the branch of SCIENCE concerned with the substances of which matter is composed, the INVESTIGATION of their PROPERTIES and reactions, and the USE of such reactions to form new substances.

28.

Hydrogen chloride can be obtained by adding concentrated Sulphuric acid to:ANaClBNa2SO4СNa2CO3DNaNO,​

Answer»

\huge\pink{\boxed{\green{\mathfrak{\overbrace{\underbrace{\fcolorbox{red}{aqua}{\underline{\pink{✯Answer✯}}}}}}}}}

SODIUM chloride

Hydrogen chloride can be OBTAINED by adding concentrated SULPHURIC acid to sodium chloride.

@MissTranquillity

29.

State Henry's law for 1 marks​

Answer»

{ \huge {\underline {{\blue{♡Answer♡}}}}}

HENRY's law is ONE of the gas laws states that: at a constant temperature, the amount of a given gas that dissolves in a given type and volume of liquid is DIRECTLY proportional to the PARTIAL pressure of that gas in equilibrium with that liquid.

\huge{{{\color{lightblue}{{ @Arneet ☃ :}}}}}

30.

Lime water also known as​

Answer»

Calcium Hydroxide........

31.

Name the method of separation in which the substance get separated of define it with it is use​

Answer»

ANSWER:

Chromatography is the method of separating

It is USED to get the COLOURED COMPONENTS of the mixture

hope you FIND my answer helpful

please mark as brainliest

32.

Write a note on molecular forumula and explain its significance in 300 words​

Answer»

Question ⤵

What is molecular formula ?

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  • A molecular formula CONSISTS of the chemical symbols for the constituent elements followed by numeric subscripts describing the number of ATOMS of each element PRESENT in the molecule.

  • The empirical formula represents the simplest whole-integer ratio of atoms in a compound.

Thanks..

33.

(अथवा)नाभिक स्नेही एवं इलेक्ट्रान स्नेही में अंतर बताइए।om​

Answer»

EXPLANATION:

वे अभिक्रियाएँ जिनमें आक्रमणकारी पदार्थ क्रियाकारी अणुओं के साथ बिना किसी विलोपन के जुड़ जाते है उन्हें योगात्मक अभिक्रिया कहते है। ... नाभिक स्नेही योगात्मक अभिक्रिया : वे अभिक्रिया जिनमें नाभिक स्नेही पहले आक्रमण करता है उसके बाद इलेक्ट्रॉन स्नेही आक्रमण करता है उन्हें नाभिक स्नेही योगात्मक अभिक्रिया कहते है।

34.

67). Nitesh, working in a factory at Kolkatareceived during the previous year 2019-202,00,000 as basic salary and 50,000as house rent allowance. Rent paid by himfor residence in Kolkata was 50,000.Amount of house rent allowance taxable inassessment year 2020-21 is(A)20,000B) 30,000(C) 50,000(D) * 25,000​

Answer»

ANSWER:

50000 is the answer PLS MARK me BRANLIST

35.

Explain reaction of metals and non metals with acids.With chemical equation.Do answer if u know the correct one only.​

Answer»

ANSWER:

metal that can ATTRACT with magnet are called METALLIC and those can't called NON metallic

36.

Consider the reaction 2H₂ + O₂ ⇋ 2H₂O. Which of the following correctly states the expression for the equilibrium constant for this reaction?1.Kc = [H₂O]² / [H₂]² [O₂]2.Kc = 2[H₂] [O₂]/ 2[H₂O]3.Kc = [H₂]² [O₂] / [H₂O]²4,Kc = 2[H₂O] / 2[H₂] [O₂]​

Answer»

ANSWER:

its the third option. Its the EXPRESSION for equilibrium CONSTANT

37.

Calculate the mole of oxygen in 6.4​

Answer»

MAY be it HELP U.......... .........

38.

The half-life period of Co is 5.26 years. Calculate the time in which its activity becomes 59% of its original value

Answer»

EXPLANATION:

The following formula relates the mass remaining of the radioiosotope to the original mass:

m

i

=

m

r

×

2

n

Where:

m

i

:

is the INITIAL mass of the RADIOISOTOPE

m

r

:

is the mass remaining of the radioisotope after n PERIODS

n

:

is the number of periods

n

=

time

half life

FIRST, find the number of periods.

n

=

15.8

years

5.26

years

n

=

3

Then plug in the values in the original formula

m

i

=

m

r

×

2

n

m

i

=

50

×

2

3

m

i

=

400

g

r

a

m

s

39.

Please answer this question fast pleasedon't spam please who will answer this question correctly I'll follow then if u will spam I will report please answer this question ​

Answer»

Answer:

ELEMENT - C          ELECTRON CONFIGURATION: [He] 2s22p2

mark me as BRAINLIEST.

40.

What do you mean by resonance energy​

Answer»

The DIFFERENCE between the potential energy of the actual structure and that of the contributing structure with the lowest potential energy is called the RESONANCE energy or delocalization energy. BENZENE is an important organic chemical COMPOUND with the chemical formula C6H6.

41.

Divide the following redox reaction into oxidation and reduction half reaction.Zn + Pb+2 →Zn+2 +PbZn + Cu+2→Zn+2 + CuCl2 + 2Br - →Br2 + 2Cl-​

Answer»

ANSWER:

here's your answer

Explanation:

Divide the FOLLOWING redox REACTION into oxidation and REDUCTION half reaction.

Zn + Pb+2 →Zn+2 +Pb

Zn + Cu+2→Zn+2 + Cu

Cl2 + 2Br - →Br2 + 2CL-

42.

यूरोट्रोपीन पर टिप्पणी लिखिए।​

Answer»

ANSWER:

यूरोट्रोपिन" का उपयोग पशु चिकित्सा में व्यापक रूप से किया जाता है। एक विरोधी भड़काऊ प्रभाव रखने, यह मवेशियों में मूत्राशय और स्तन ग्रंथियों के रोगों को जल्दी से समाप्त करने में सक्षम है। त्वचा पर खुजलीदार दाने के रूप में एलर्जी की प्रतिक्रिया। यह लक्षण दवा को रोकने के बाद जल्दी और पूरी तरह से गुजरता है।

43.

What are the nurses responsibilities during medication administration?​

Answer»

THE ROLE OF THE NURSE IN DRUGTHE ROLE OF THE NURSE IN DRUG ADMINISTRATIONADMINISTRATION Another responsibility of the nurse is toAnother responsibility of the nurse is to monitor the effect of the drugs that aremonitor the effect of the drugs that are ADMINISTERED to a client, i.e.administered to a client.

44.

if 2.4088 * 10^26 electrons are there in a pure sample of H2SO4, then what is the mass of oxygen present?

Answer»

ANSWER:

ɪ ᴅᴏɴ'ᴛ ᴋɴᴏᴡ ᴛʜᴇ ᴀɴsᴡᴇʀ sᴏʀʀʏ ᴍᴀɴ.

EXPLANATION:

ʙᴜᴛ ʏᴏᴜ ᴄᴀɴ ᴀsᴋ ᴛʜᴇ ǫᴜᴇsᴛɪᴏɴ ɪɴ ᴀɴʏ ᴏᴛʜᴇʀ ᴛɪᴍᴇ ᴏᴋ ʙʏᴇ.

45.

Explain following.a) Blending b) Biodegradable c) Recycling d) Decomposition​

Answer»

Answer:

\answer

a) Blending:- To COMBINE with something in an attractive or suitable way.

b) BIODEGRADABLE :- That can be taken back into the EARTH naturally and so not harm the environment.

C) Recycling :- Recycling is the process of converting waste materials into new materials and objects.

d) Decomposition :- Decomposition is the first STAGE in the recycling of nutrients that have been used by an organism (plant and animal) to build it's body.

46.

Word equation of Carbon dioxide in air to carbohydrates in plants.​

Answer»

ANSWER:

AFTERWARDS DEAR OK BYE

47.

29. (i) Calculate the mass of oxygen in(a) 6.022 x 1023 number of O, molecules.canins(b) 6.022 x 1023 number of O-atoms.(ii) How many moles of NaCl are present in 20 g of the substance?[Atomic mass of Na = 23, Cl = 35.5 u]​

Answer»

ANSWER:

PLZ MARK me as BRAINALIEST ans

Explanation:

HEELO

48.

गति के समीकरण बताओ short answers​

Answer»

ANSWER:

ग्राफीय विधि द्वारा गति के समीकरण (Equations of Motion by GRAPHICAL Method) मान लिया कि एकसमान त्वरित गति से चल रहे एक वस्तु का ग्राफ निम्नांकित है। मान लिया कि समय t में वस्तु का प्रारंभिक वेग U से बद्लकर v हो जाता है। अब बिन्दु B से दो लम्ब BC तथा BE क्रमश: समय तथा वेग अक्ष पर डाला गया।

49.

Tell me something about depression in freezing point ...​

Answer»

Explanation:

यह एक ऐसी बीमारी है जिसमें आप बहुत ज्यादा दुखी होते हो और उस बुक की कारण आपकी मृत्यु भी हो सकती है क्योंकि कई लोग इस बीमारी के कारण मर जाते हैं आत्महत्या कर लेते हैं यह बीमारी ज्यादा स्ट्रेस या फिर ज्यादा टेंशन और बहुत ही ज्यादा दुखी रहने से हो किसी को भी हो जाती है.इसलिए हमें हमेशा खुश रहने की कोशिश करनी चाहिए क्योंकि अगर हम बहुत ही ज्यादा दुखी रहेंगे तो हमें भी ऐसी बीमारी डिप्रेशन यानी हो सकती है

hope it works for you now PLEASE MARK me as BRAINLIEST i havr EXPLAINED u much easier in hindi :)))

50.

Якою стане масова відсоткова концентрація 32 % розчину нітратної кислоти, (r  = 1,2 г/см3), коли до 500 мл його долити 1 літр води?​

Answer»

ANSWER:

can't UNDERSTAND your language

plz FOLLOW me