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.

What is lithium most used for?

Answer»

The most important use of lithium is in rechargeable batteries for MOBILE PHONES, laptops, digital CAMERAS and electric vehicles. Lithium is also used in some non-rechargeable batteries for things like heart pacemakers, toys and clocks.Lithium is used to treat and prevent episodes of MANIA (FRENZIED, abnormally excited mood) in people with bipolar disorder (manic-depressive disorder; a disease that causes episodes of depression, episodes of mania, and other abnormal moods). Lithium is in a class of medications called antimanic agents.Hey Mate!!!! Here is your answer ♣️

2.

What is the largest source of error in the experiment heat of neutralization?

Answer»

The largest source of error in this experiment was the gross IMPRECISION of the MEASURING instruments. Exactly 50.0 mL of solutions should have been used, as many derivative calculations depend on that amount being PRECISE. The plus/minus values PROVIDE cause for CONCERN.

3.

What is the 2nd law of thermodynamics in simple terms?

Answer»

The second LAW of thermodynamics means hot THINGS always cool unless you do SOMETHING to stop them. It expresses a fundamental and simple truth about the universe: that DISORDER, characterised as a quantity known as entropy, always INCREASES

4.

What are 3 common uses for lithium?

Answer»

The most important use of lithium is in rechargeable batteries for MOBILE phones, laptops, DIGITAL cameras and electric vehicles. Lithium is ALSO USED in some non-rechargeable batteries for things like heart pacemakers, TOYS and clocks.

5.

How is metal similar to lithium?

Answer»

Since sodium (NA) is in the same family as lithium and is just below it in the PERIODIC table, sodium should be the most SIMILAR to lithium.Hey Mate!!!! Here is your answer ♣️

6.

How do we classify carbon?

Answer»

Carbon can be classified as primary, secondary, TERTIARY or QUATERNARY depending on the NUMBER of carbon atoms it is BONDED to.

7.

What are sources of error?

Answer»

These can arise due to random and unpredictable fluctuations in experimental conditions (e.g. unpredictable fluctuations in TEMPERATURE, voltage supply, MECHANICAL VIBRATIONS of experimental set-ups, etc), personal (UNBIASED) ERRORS by the observer taking readings, etc

8.

Why lithium is most powerful reducing agent?

Answer»

Lithium (LI) is a stronger reducing AGENT than NA DUE to greater HYDRATION energy.

9.

What are 3 interesting facts about carbon?

Answer»

1. carbon is a non metal and has a VALENCY of 4 and hence it shares it electons and therefore forms a covalent BOND. 2. it can FORM long chain with many other carbon atoms and this property of carbon is known as CATENATION. 3. it has high melting and boiling points.

10.

What are the possible sources of error in a bomb calorimetry experiment?

Answer» SOURCES of error INCLUDE the percent error in water measurement and incomplete vaporization of the NICHROME wire. The internal volume of the Parr-bomb was MEASURED to be 341mL.
11.

Which is not characteristics of carbon?

Answer» CARBON has no ORBITAL in VALENCE SHELL.
12.

> CH3-CH-CH2-CH 2 -CH₂-CH 2 -CH CH - CH2 - CH3 Br CM3 che CH2-CH3 find the structure of compound, JUPAC Name and common name ?​

Answer»

tion:Your search - > CH3-CH-CH2-CH 2 -CH₂-CH 2 -CH CH - CH2 - CH3 BR CH3 che CH2CH3 find the ... - did not MATCH any documents.Suggestions:Make sure that all words are SPELLED correctly.Try different keywords.Try more general keywords.Try fewer keywords.

13.

Magnesium (mg)+oxygen(02)=

Answer»

tion:As magnesium (Mg) has a valency of +2, and oxygen (O) has a valency of -2, the ratio would be 1:1, and magnesium oxide would be REPRESENTED as MGO. The number of atoms of each element on reactant and product side must be EQUAL. That is the basic principle for balancing an equation.

14.

Simple experiment that can distinguish between strong and weak electrolytes

Answer»

tion:Electrolytes are substances which, when dissolved in WATER, break up into cations (plus-charged IONS) and anions (minus-charged ions). We say they IONIZE. Strong electrolytes ionize completely (100%), while weak electrolytes ionize only PARTIALLY (usually on the ORDER of 1–10%).

15.

How many 5 gram of calcium carbonate is completely react with 5 gram of calcium carbonate completely react with

Answer»

o the attachmentHope it's HELPFUL

16.

What is empirical formula???​

Answer» TION:here is your ANSWER HOPE it's HELPFUL if not I am SORRY
17.

on the electrolysis of acidified water the mass of oxygen liberated at the anode by passing 9650 Faraday electricity is​

Answer»

0.8g EXPLANATION:MARK my WORDS this is the CORRECT ANSWER

18.

How many grams of copper is produced when 20A of current is passed through copper2sulphate soln for 4hrs

Answer» TION:W= FEIT = 2×9650063.52×1.5×20×60 =0.529g
19.

Which of the following oxides is most acidic in nature ? MgO , BeO, BaO, CaO​

Answer»

BeO is most acidic in NATURE. Explanation:BeO is most acidic in nature because the acidity of oxides DECREASES with increases within the electropositive CHARACTER of the central ATOM.

20.

Only single girl. Plz messages me on whats. 9934260251. Jo ladki single hai wahi messages karna. I need best life partner. Lakin ladki ka age 14 ya 15 hona chahiye​

Answer» PLEASE don't send LIKE this message this APP only for STUDY so please
21.

20/ k2co3 ka wilyan ki molarta geyaat kijiye 20/k2co3 molarta se yehe giyaat hota have ki 20gm k2co3 me jal ke 80gm gule hi

Answer»

please mark me as BRAINLIST EXPLANATION:अंश की गणना कीजिए।हलकार्बन टेट्राक्लोराइड में 30 द्रव्यमान % बेन्जीन का तात्पर्य है,बेन्जीन का विलयन में द्रव्यमान = 30 gCCl4 का विलयन में द्रव्यमान = 70 gबेन्जीन (C6H6) का मोलर द्रव्यमान = 6 x 12 + 6 x 1 = 78 G mol-1कार्बन टेट्राक्लोराइड (CCl4) का मोलर द्रव्यमान = 12 + 4 x 35.5 = 154 g mol-1

22.

What happen when iron react with stream and calcium and potassium are put in water

Answer»

Iron react with STEAM to form the metal oxide and hydrogen. (ii) The reaction of calcium with water is exothermic but the heat evolved is not SUFFICIENT for the hydrogen to catch fire. Calcium STARTS floating because the bubbles of hydrogen gas FORMED stick to the surface of the metal.Explanation:Please mark me as brilliant

23.

Why does lithium react slowly with water?

Answer»

All the alkali metals readily REACT with water to form HYDROXIDES with the release of the hydrogen gas but lithium reacts slowly with water because it has higher activation energy and slower rate of reaction and forms colorless solution of lithium hydroxide ALONG with the release of hydrogen gas.

24.

What happens when a lithium battery explodes?

Answer»

I didn't UNDERSTAND THIS QUESTIONEXPLANATION:TELL ME QUICKLY

25.

What is the main application of Hess's law?

Answer»

Thermochemical EQUATIONS can be added subtracted or multiplied like ORDINARY algebraic equations. Hess's law is useful to calculate heats of MANY reactions which do not take place DIRECTLY. It is useful to find out heats of extremely slow reaction.

26.

What causes lithium battery fires?

Answer»

The PROBABLE root cause of the fire is physical damage to the BATTERY, causing thermal runaway in the battery. The built-up pressure was RELEASED through CRACKS in the first battery CELL affected, causing thermal runaway in some of the other cells.

27.

What are the 4 types of carbon compounds?

Answer» CARBOHYDRATES, LIPIDS, PROTEINS and NUCLEIC ACID.
28.

How does the second law of thermodynamics work?

Answer»

ond Law of THERMODYNAMICS is about the quality of energy. It states that as energy is TRANSFERRED or TRANSFORMED, more and more of it is wasted. The Second Law also states that there is a natural tendency of any isolated SYSTEM to DEGENERATE into a more disordered state.

29.

Why hydration enthalpy of lithium is highest?

Answer» LITHIUM exerts the greatest polarizing effect out of all the alkali metals on the NEGATIVE ion. Being SMALLEST in alkali metals, it's ion LI+ is smaller, this increases the charge density for this job appreciably. CONSEQUENTLY, its hydration energy becomes large.
30.

What is the 3rd law of thermodynamics in simple terms?

Answer»

The THIRD LAW of thermodynamics states that the entropy of a system approaches a constant VALUE as the TEMPERATURE approaches ABSOLUTE zero.

31.

What is enthalpy in real life?

Answer» REFRIGERATOR compressors and chemical hand warmers are both real-life examples of ENTHALPY. Both the vaporization of refrigerants in the compressor and the reaction to the iron OXIDATION in a hand WARMER generate a change in heat content under constant pressure.
32.

What are the 4 types of carbon?

Answer»

Diamond, B) Graphite, C) LONSDALEITE, d) C60 (Buckminsterfullerene or BUCKYBALL), e) C540, f) C70, g) Amorphous carbon, and h) single-walled carbon nanotube, or buckytube.

33.

Acids turn ___litmus into ___

Answer» ACIDS TURNS BLUE LITMUS RED
34.

Electric field and magnetic field can deflect which rays

Answer»

Electric fields can deflect alpha and beta radiation.The protons, cathode rays and the alpha particles are charged particles, so these are DEFLECTED by the MAGNETIC field.Explanation:Hope it will be HELPFUL for youPlease MARK as brainliest

35.

1)Write the relationship between pressure fore nd area. 2) explain why the foundation of high rise building R made wider ???​

Answer»

Pressure is a measure of the force exerted on a SURFACE. When the force is more, the pressure is more and when the force is less, the pressure is less. The pressure is also related to the AREA of CONTACT in such a way that both are INVERSELY proportional to each other. The relationship between pressure and area of contact can be understood from VARIOUS real-life situations.

36.

The molal depression constant of water is 1.86 K. Kg. mol-1 . Calculate the depression in freezing point of 0.1 molal aqueous urea solution. (molar mass of urea = 60 g / mol)​

Answer»

Depression in FREEZING point is given byΔT f =i×K f ×mΔT f =T fo −T f i= Vant hoff FACTOR =1 (for non electrolyte)K f =1.86K/mm= MolalityΔT f =i×K f × weight of solvent in kgmoles of solute Moles of SOLUTION (urea) =0.02Molar MASS of solute (urea) =60g/molWeight of solvent (water) =100g=0.1kg(T f0 −T f )=1×1.86× 0.1kg0.02 (0−T f ) o C=0.372T f =−0.372 o C

37.

The value of kp for the reaction N2 + 3H2 guves 2NH₃ at 700k and 800k are 1.50x 10-4 and 1.30x10-5 Respectively Calculate the heat of formation of NH3 ​

Answer»

The VALUE of KP for the reaction N2 + 3H2 guves 2NH₃ at 700k and 800k are 1.50x 10-4 and 1.30x10-5 Respectively Calculate the HEAT of formation of NH3 - did not match

38.

Chalk dissolves in water . True or False

Answer» CHALK does not DISSOLVE in WATER
39.

5. Assuming complete decomposition, the volume of Co, released at S.T.P. on heating 9.55 g Baco, will be (Atomic weight of Ba = 137) (1) 1.12 L (2) 0.84 L (3) 2.24 L no and 32 g HCI? (Molar mass (4) 4.06 L​

Answer»

n:-Assuming complete decomposition, the VOLUME of Co, released at S.T.P. on HEATING 9.55 g Baco, will be (Atomic weight of Ba = 137).Given:-when heated BaCo = 9.55g.Atomic weight of Barium CARBONATE = 137.Solution:-In question mole of weight of Ba is given but not a Carbon and oxygen is given because they are common.So,137 of Ba + 12 of Carbon + 16 × 3 of oxygen. molecular weight of BaCo3 = molecular weight of Ba + molecular weight of C + 3 × molecular weight of O.Answer:- = 1.085l

40.

Hey armyplease follow this account and help my friend ​

Answer» HELLO ARMY what are you doing
41.

What is a balanced chemical equation? why should chemical equations be balanced?​

Answer»

Balanced CHEMICAL equation is an equation where the mass of reactants is EQUAL to the mass of products.Explanation:According the law of conversation of mass, it would be ILLOGICAL if mass is reactants is not equal to mass of products in REAL LIFE experiments....as mass can neither be created nor be destroyed.Please mark this answer as the Brainliest❤️

42.

Answer question please ​

Answer» MAGNESIUM OXIDE EXPLANATION:MARK BRAINLIEST
43.

Symbol of Hydroxyl anion and valency​

Answer» TION:SYMBOL : OHHydroxide: It has −1 VALENCY ⟶OH−, −2 CHARGE of O+(+1) charge of H=−2+1=−1.
44.

Yep you are correct daddy kokkie and The last one is PTD (permission to dance) congratulations to all who have given correct answers​

Answer» SMOOTH LIKE BUTTER like a CRIMINAL underover
45.

Can a discharged lithium battery catch fire?

Answer» YES , in some CONDITION it CATCH FIRE
46.

What are the three statements of second law of thermodynamics?

Answer»

The SECOND Law of THERMODYNAMICS states that the STATE of ENTROPY of the entire universe, as an isolated system, will ALWAYS increase over time. The second law also states that the changes in the entropy in the universe can never be negative.

47.

How do you calculate the enthalpy of CO2?

Answer»

The enthalpy of FORMATION of carbon dioxide at 298.15K is ΔHf = -393.5 kJ/mol CO2(g). Write the chemical EQUATION for the formation of CO2. This equation must be written for one mole of CO2(g).Explanation:If this is helpful then PLEASE mark me as the brainliest ...

48.

What is antibody structure?

Answer»

An ANTIBODY, also known as an immunoglobulin, is a Y-shaped structure which consists of four polypeptides — two heavy CHAINS and two light chains. ... It is composed of one constant and one variable DOMAIN of each of the heavy and the light chain

49.

How can you tell if a lithium-ion battery is failing?

Answer»

By checking its CAPACITY to STORE ENERGY which KNOWN as in the form of MHA

50.

Does a lithium battery die?

Answer»

Rechargeable Lithium-Ion BATTERIES have a limited life and will gradually lose their capacity to HOLD a charge. This LOSS of capacity (aging) is IRREVERSIBLE. As the battery loses capacity, the length of time it will power the product (run time) DECREASES.