Explore topic-wise InterviewSolutions in Current Affairs.

Answer:

soil : in soil have DIFFERENT substances like mineral,nutrients,water etc.

sea water : in sea water have LARGE amount of salt.

air: in air have many gases like oxygen,carbon dioxide etc.

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ANSWER:

you see in PIC

EXPLANATION:

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Answer:

molar MASS of caffeine=194 mol.

no.of MOLES of caffeine in 3.206 G =0.0165 moles.

0.0165 * 6.022 *10²³ atoms = 0.09963 * 10²³=10²².

ANSWER:

the monoboric ACID is H3BO3

Answer:

Given:

Wavelenghth of absorbed photon, λ = 300 NM

Wavelenghth of re-emitted photon, λ1 = 496 nm

Wavelenghth of re-emitted photon, λ2 = x nm

We know,

ETotal = E1 + E2

STRAIGHT E space EQUALS hc over straight lambda

hc over straight lambda subscript space equals hc over straight lambda subscript 1 plus hc over straight lambda subscript 2

1 over straight lambda space equals space 1 over straight lambda subscript 1 plus 1 over straight lambda subscript 2

1 over 300 equals 1 over 496 plus 1 over straight lambda subscript 2

1 over straight lambda subscript 2 space equals 1 over 300 MINUS 1 over 496

1 over straight lambda subscript 2 space equals 0.00131

straight lambda subscript 2 space equals 759.18 space nm

Wavelength of the other photon is 759.18 nm

Answer:

IONISATION energy refers to the energy needed to be supplied to remove an electron from the isolated gaseous atom.

Explanation:

IE2>IE1 because after removal of an electron as the atomic size DECRASES EFFECTIVE nuclear charge consequently INCREASES ,it becomes more difficult to remove next electron.

Answer:

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Explanation:

There are many FACTORS that affect a drug's distribution throughout an organism, but Pascuzzo considers that the most important ONES are the following: an organism's physical VOLUME, the removal rate and the degree to which a drug binds with plasma PROTEINS and / or tissues.

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Answer:

8 g is formed DUE to LAW of conservation of mass

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ᴀᴛ ᴛᴇᴍᴘᴇʀᴀᴛᴜʀᴇs ɢʀᴇᴀᴛᴇƦ ᴛʜᴀɴ ᴀʙsᴏʟᴜᴛᴇ ᴢᴇʀᴏ, ᴇɴᴛʀᴏᴘʏ ʜᴀs ᴀ ᴘᴏsɪᴛɪᴠᴇ ᴠᴀʟᴜᴇ, ᴡʜɪᴄʜ ᴀʟʟᴏᴡs ᴜs ᴛᴏ ᴍᴇᴀsᴜʀᴇ ᴛʜᴇ ᴀʙsᴏʟᴜᴛᴇ ᴇɴᴛʀᴏᴘʏ ᴏҒ ᴀ sᴜʙsᴛᴀɴᴄᴇ. ᴍᴇᴀsᴜʀᴇᴍᴇɴᴛs ᴏҒ ᴛʜᴇ ʜᴇᴀᴛ ᴄᴀᴘᴀᴄɪᴛʏ ᴏҒ ᴀ sᴜʙsᴛᴀɴᴄᴇ ᴀɴᴅ ᴛʜᴇ ᴇɴᴛʜᴀʟᴘɪᴇs ᴏҒ ғᴜsɪᴏɴ ᴏƦ ᴠᴀᴘᴏʀɪᴢᴀᴛɪᴏɴ ᴄᴀɴ ʙᴇ ᴜsᴇᴅ ᴛᴏ ᴄᴀʟᴄᴜʟᴀᴛᴇ ᴛʜᴇ ᴄʜᴀɴɢᴇs ɪɴ ᴇɴᴛʀᴏᴘʏ ᴛʜᴀᴛ ᴀᴄᴄᴏᴍᴘᴀɴʏ ᴀ ᴘʜʏsɪᴄᴀʟ ᴄʜᴀɴɢᴇ.

ANSWER:

what is this

Explanation:

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Chemical reactions underpin the PRODUCTION of pretty much EVERYTHING in our modern world. But, what is the driving force behind reactions? Why do some reactions occur over geological time scales whilst others are so fast that we need femtosecond-pulsed lasers to study them? Ultimately, what is going on at the atomic level? Discover the answers to such fundamental questions and more on this course in introductory physical chemistry. The course covers the key concepts of three of the principal TOPICS in first-year undergraduate physical chemistry: thermodynamics, kinetics and quantum mechanics. These three topics cover whether or not reactions occur, how fast they go and what is ACTUALLY going on at the sub-atomic scale.

ANSWER:

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ANSWER:

It's called Sodium Carbonate Heptahydrate

Explanation:

Here Sodium Carbonate is a compound and H2O after that is referred as the WATER of crystallisation of the salt Na2CO3.7H2O and heptahydrate means that there are 7 MOLECULES of water in the following compound.

ANSWER:

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Answer:

WELL it is done in a lab

Explanation:

by using sodium metal and WATER PF around 35.0g

they produce the sodium hydroxide

ANSWER:

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Certain elements combine with other atoms, donating, ACCEPTING or sharing electrons in different PROPORTIONS depending on the nature of the REACTION. For example, IRON combines with oxygen to form ferrous oxide as well as ferric oxide. This is termed variable VALENCY.

ANSWER:

volume at NTP occupied by 10^21 MOLECULES of Oxygen

No. of moles = No. of molecules / N .... ( N is avagadro number....)...

No. of moles = 10^21 / 6 × 10^23 ...

= 1/6 × 10^-2 = 0.0016 ...

Volume at STP = moles × 22.4

= 0.0016 × 22.4 = 0.037 L.

ANSWER:

B . ELECTRONS GET ATTRACTED

ANSWER:

PLEASE REFERS to the IMAGE GIVEN above

ANSWER:

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Your newborn may be VULNERABLE to these 6 serious diseases.

Normality of any acid or BASE will be equal to gram-equivalent desolve in given volume

N = gram-equivalent/ volume(lt.)

When TWO or more compounds or elements react together their

gram-equivalent will be equal in simple way, 10 gm-eq of an acid will react completely with 10 gm-eq of base,

In given problem,

gm-eq. of H2SO4 = N*V(lt.)

and N = n*M where, M = molarity and n = basicity or acidity of an acid or base.

gm-eq of H2SO4 = 100*2*0.2*0.001

=0.04gm-eq

gm-eq of NaOH = 100*0.2*1*0.001

=0.02

remaining gm-eq of H2SO4 = 0.04–0.02

0.02gm-eq

Now,

gm-eq. = N*V = 0.02

Total volume =200ml = 0.2 lt.

N*0.2 = 0.02 = 0.1N

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• The two ways through which living organisms influence the formation are-:
• By bombing in the huge mountain
• By established different kinds of mining in mountain are.

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EXPLANATION:

Decomposition reaction

A reaction in which a REACTANT BREAK down into TWO or more products.

In the electrolytic cell, the electrons flow from CATHODE to ANODE through INTERNAL supply.

Answer:

2.63 moles

Explanation:

As we have n = MASS GIVEN in grams/molar mass

so by putting the VALUES we get the above mentioned answer

Explanation:

40.0 %

Thus the % COMPOSITION of glucose by mass is carbon 40.0 % oxygen 53.3 % HYDROGEN 6.7 % In this way, the % composition by mass of any COMPOUND can be calculated PROVIDED that its formula is known.

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Answer:

See Examples of Compounds. A chemical formula or equation shows the symbols of the elements in the compound and the ratio of the elements to ONE another. ... For example, the chemical formula for water is H2O which INDICATES that 2 atoms of HYDROGEN COMBINES with 1 ATOM of oxygen.

Answer:

EXPLANATION:

The galvanic cell in which the given reaction takes place is depicted as:  

Zn(s)∣Zn  

2+

(AQ)∣∣Ag  

+

(aq)∣Ag(s)

(i) The negatively charged ELECTRODE is the zinc electrode. It acts as an anode.

(ii) In the external circuit, the current will flow from silver to zinc.

(iii) Oxidation at anode: Zn(s)→Zn  

2+

(aq)+2e  

−

REDUCTION at cathode: Ag  

+

(aq)+e  

−

→Ag(s)

ANSWER:

GIVE CHARACTERS of NEANDERTHAL MAN.

Explanation:

Single PARTICLE. The unit of momentum is the product of the units of mass and VELOCITY. In SI units, if the mass is in kilograms and the velocity is in meters PER second then the momentum is in kilogram meters per second (kg⋅m/s).

SI unit: kilogram meter per second kg⋅m/s

Other units: slug⋅ft/s

Common symbols: p, p

Answer:

The ENTRIRE light is reflected into DENSER MEDIUM which is called total  INTERNAL reflection.

Answer:

true

Explanation:

b/c consider ICE when it absorbe HEAT its BONDS BECOME WEAK

Answer:

45.28 PERSENTAGE copostion

<P>Answer:

P=

V

P

1

V

1

+P

2

V

2

P=

1000

600×800+400×600

=720 MM

ANSWER:

the high VACUUM was CREATED by THOMAS Edison

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ANSWER:

MOLECULES is the CORRECT answer ALWAYS WAYS

ANSWER:

Tyndall effect, also called Tyndall phenomenon, SCATTERING of a beam of LIGHT by a MEDIUM containing small suspended particles—e.g., smoke or dust in a room, which makes VISIBLE a light beam entering a window.

Answer:

It was observed that when a high potential difference was applied b/w the electrodes, not only cathode rays were produced but also a new type of rays were produced SIMULTANEOUSLY from anode moving towards cathode and PASSED through the HOLES or canals of the cathode. These rays were termed canal rays since these passed through the canals of the cathode.These were also named anode rays as these originated from anode.

When the properties of these rays were STUDIED by Goldstein, he observed that these rays consisted of positively charged particles and named them as positive rays.

Answer:

It must be H2 + Cl2 = 2HCl…

1 atom of Hydrogen reacts with 1 atom of Chlorine and form 2 molecules of Hydrochloric acid DUE to the presence of 2 ATOMS of both the substances (i.e. H2 and Cl2)

And this TYPE of reaction is KNOWN as REDOX reaction..

Reason: Hydrogen shows electron loss thereby getting oxidised and chlorine accepts the electrons lost by hydrogen thereby getting reduced!

H2 → 2 H(+) + 2 e(-)

Cl2 + 2 e(-) → 2 Cl(-)

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ANSWER:

any ONE from abve

Explanation:

ANSWER:

ANSWER:

The IMPURITIES present in the ORE are called GANGUE

ANSWER:

the CAUSTIC SODA is the other name of SODIUM hydroxide

ANSWER:

Explanation:

SALT formed by weak acid and strong base FORM strong salt. Here, SODIUM is a strong base and carbonate is a weak acid.

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Explanation:

Mentionone method by which living organisms influence the formation of soil. Solution : Lichens SECRETE chemicals to dissolve MINERALS from rock SURFACE, produce crevices where dust collects and mosses grow to FORM small amount of soil.

A physical property is any property that is MEASURABLE, whose value describes a state of a physical system. The changes in the physical PROPERTIES of a system can be USED to describe its changes between momentary states. Physical properties are often referred to as OBSERVABLES. They are not MODAL properties...

Answer:

When a saturated solution of potassium CHLORIDE prepared at 60°C is ALLOWED to cool to room temperature, crystals of potassium chloride will be FORMED and GET separated out. (b) Initially, when sugar solution is heated, water gets evaporated. But when heated to DRYNESS, sugar gets charred and turns black.

ANSWER:

हां................