Explore topic-wise InterviewSolutions in .

This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.

1251.

How many molecules are there in 1½ molecules of water?​

Answer»

ANSWER:

TWELVE molecules

During photosynthesis, WATER is OXIDIZED to release oxygen and carbon dioxide is reduced to form sugar. The twelve molecules of water release six molecules of oxygen along with the formation of one MOLECULE of hexose.

1252.

During a chemical reaction, the sum of the masses of the reactants and products remains unchanged. Ina pure chemical compound, elements are always present in a definite proportion by mass. These two statements represent two very important laws in chemistry.i) What are these two laws collectively called?ii) In a reaction, 5.3g of sodium carbonate reacted with 6g of ethanoic acid. The products formed include 2.2g of carbon dioxide, 0.9g of water and ‘X’ gram of sodium ethanoate. What is the value of ‘X’?iii) If hydrogen and oxygen combine in the ratio 1:8 by mass to form water, what mass of oxygen gas would be required to react completely with 3g of hydrogen?iv) The building block of matter is used to create a unit for measuring masses of atoms. Define one atomic mass unit.​

Answer»

Answer:

QUESTION - 3/35 2020033800027601 :

If the standard DEVIATION of a Poisson variable X is √2, then the probability that X is STRICTLY positive is ________.

 e^2

 e^-2

 1 - e^2

 1 - e^-2

TIMER

Start Time : ...

1253.

What is Gustatory receptors?​

Answer»

Gustatory and olfactory RECEPTORS are the sensory receptors that are RELATED to sense of taste and sense of smell. (a) Gustatory receptors are PRESENT on the tongue are spread evenly across the taste buds. Their main function is to PROVIDE a sense of taste.

1254.

स्वाध्यायचौकटी पूर्ण करा.कळस चढवणारेपाया रचणारेवारकरी संप्रदायरूपीइमारत उभे करणारे संतखांब होणारेभिंती उभारणाgive ans in marathi ​

Answer»

EXPLANATION:

फोन कीजिए या आवारा स्वा स्वा आया आया आया आया सोमवार रायगढ़ अमर राइडर राइडर

1255.

Liquid ‘A’ has a bitter taste. It dissolves in water and turns red litmus blue. What will happenif a drop of phenolphthalein is added to it? Identify the nature of liquid.

Answer»

ANSWER:

this is a answer THANK you

1256.

Complete the following table.HCl and Zn Cl2SimilarityDifferenceH2SO4 and NaSO4SimilarityDifference

Answer»

EXPLANATION:

can't ABLE to ANSWER SORRY

1257.

Q15. Complete the following table.HCl and Zn Cl2SimilarityBoth of them have the Ci element.DifferenceOne Ci element has H2SO4 and NaSO4SimilarityDifference

Answer»

ANSWER:

NsaRU7chEEKyE46FgftEg

1258.

This was done In the past, waste water from the kitchens and bathrooms was often sent into the vegetable garden because(a) the water was reused to water the garden.(b) there were no drains.(c) it saved the gardener a lot of work.(d) it improved the quality of the vegetables

Answer»

ANSWER:

option d

Explanation:

MARK as branlist first

1259.

Which colour is hot?1. Pink2. Green3. Yellow​

Answer»

ANSWER:

Yellow

Please MARK me as BRAINLIEST.

1260.

What do you mean by chemistry??​

Answer»

Answer:

Nikko Steuber, knows HINDI. Answered 2 years ago. Here is the FULL form of CHEMISTRY:- C-Carbon, H-Hydrogen, E-Eintenium, M-manganese, I-iodine, S-Sulphur, T-Titanium, R-Radium, Y-Yterbium.

1261.

VI. Write the chemical formula for the following chemical compounds by criss - cross method:1. Calcium carbonate 6. Blue vitriol2. Sodium hydroxide 7. Iron oxide3. Magnesium oxide 8. Sodium carbonate4. Ferrous sulphate 9. Milk of Magnesia5. Lime water / Slaked lime 10. Zinc chloride

Answer»

ANSWER:

sufwweig8{${€

fusuee

duue

gue3uiwt824528cfigid dhandhe

1262.

The element like helium ,neon and argon have the ability to exist as single _(atom,molecule).fill up​

Answer»

ANSWER:

Atom

Explanation:

CAUSE they are stable.Their OUTERMOST ELECTION are FILLED

1263.

The_(maas/weight) of matter remains same whereas_ the (mass/weight) varies with the gravityfill up​

Answer»

ANSWER:

The mass of MATTER REMAINS the same whereas the WEIGHT varies with the GRAVITY

Hope it helps you

1264.

The quantity of matter that a body contains is called its _ (mass/weight) fill up ​

Answer»

ANSWER:

Mass

Please MARK me as BRAINLIEST

1265.

The quantity of matter that a body contains is called its _ fill in the blanks​

Answer»

ANSWER:

CAPACITY or Volume

PLEASE MARK me as BRAINLIEST

1266.

A molecule is the smallest unit of matter true or false​

Answer»

ANSWER:

FALSE, ATOM is the SMALLEST UNIT of matter

1267.

(2x3=b)a) 'An exothermic reaction, once begun, always reaches completion.' Justify the statement with anexample​

Answer»

Exothermic reactions are generally thermodynamically SPONTANEOUS because even if it is accompanied by decrease of randomness ( e.g.,in the condensation of a gas or solidification ofa liquid), the heat releasedis ABSORBED by the surroundings so that the ENTROPY of the surroundings increases to such an extent that

Exothermic reactions are generally thermodynamically spontaneous because even if it is accompanied by decrease of randomness ( e.g.,in the condensation of a gas or solidification ofa liquid), the heat releasedis absorbed by the surroundings so that the entropy of the surroundings increases to such an extent thatis positive.
(b) The molecules in the vapour state have greater FREEDOM of MOVEMENT and hence greater randomness than those in the liquid state. Hence, entropy increases in going from liquid to vapour state.

pls make me brainlest answer pls my frnd

1268.

3. Most gases can be seen with our naked true or false​

Answer»

ANSWER:

False

Explanation:

"PLEASE MARK it as BRAINLIEST."

1269.

Which is your favorite cloth brand​

Answer»

EXPLANATION:

ADIDAS is my FAV. CLOTH BRAND.

1270.

The branch of horticulture dealing with orchids is called​

Answer»

Answer:

Branches of HORTICULTURE ORNAMENTAL gardening: It is the branch of horticulture which DEALS with the study of growing of ornamental foliage and flowering trees, shrubs, climbers, seasonal FLOWERS, cacti, orchids, INDOOR and outdoor garden plants.

1271.

Differentiate between three states of matter on the basis of kinetic molecular theory in detail. ​

Answer»

Answer:

Gases, liquids and solids are all made up of microscopic particles, but the behaviors of these particles differ in the three phases. ... gas are well separated with no regular ARRANGEMENT. LIQUID are close together with no regular arrangement. solid are tightly packed, usually in a regular pattern.

The three phases of matter: Notice that the spacing between atoms or molecules increases as we move from a description of the solid phase to the gaseous ONE. The KINETIC molecular theory of matter states that: ... This in TURN determines whether the substance exists in the solid, liquid, or gaseous state.

Hope it helps you..

1272.

5. Matter has mass and (volume/colour).​

Answer»

ANSWER:

VOLUME is the CORRECT answer.

1273.

Sketch larynx and explain its function in your own words?​

Answer»

In humans, the SOUND is produced by the larynx also called VOICE box. At the upper end of the WIND pipe, there is larynx. These are two vocal cords STRETCHED across the larynx leaving a narrow slit between them from the passage of air.

1274.

(melting/freezing6. The process of water changing into ice is called​

Answer»

ANSWER:

FREEZING is the PROCESS

1275.

how many moles are there in 9.8 gram of H2 s o4 (given atomic mass of Al is equal to 27 u, H is equal to 1 u, s is equal to 32 u and O is equal to 16 u​

Answer»

Answer:

98

Explanation:

The molar mass of hydrogen is 1

Molar mass of SULPHUR (S) is 32

Molar mass of oxygen (O) is 16

Now ,

2(1)+32+4(16) = 98

Molar mass of sulphuric ACID i.e. H

2

SO

4

is 98

1276.

3. The temperature at which a solid changes into a liquid is called the(melting point/boiling point),​

Answer»

ANSWER:

melting point

Explanation:

PLEASE mark as BRAINIEST

thank you

1277.

2. In a(physical change/chemical change), a new substance is formed .​

Answer»

ANSWER:

CHEMICAL changes forms a NEW substance

1278.

*WHAT IS SOIL EROSION

Answer»

Explanation:

Soil erosion is the NATURAL REMOVAL of the topsoil by the action of WIND,WATER or both.

HOPE THIS HELPS

1279.

1. A(physical/chemical change is reversible.​

Answer»

ANSWER:

PHYSICAL  CHANGE is reversable

EXPLANATION:

1280.

5. Why do clothes dry faster when the weather is windy?(a) Wind helps the clothes spread out(b) Wind helps in faster evaporation(c) Wind makes the clothes move to and fro.(d) Wind makes the air warm.​

Answer»

ANSWER:

(b)WIND HELPS in faster EVAPORATION

1281.

An element m reacts with Sulphur to form MS what will be the valency of M​

Answer»

ANSWER:

+2

Explanation:

I THINK so the VALENCY of MAGNESIUM is 2

1282.

Which will be more stable s - atom or s - 2 give reason​

Answer»

ANSWER:

S ATOM is more STABLE it is INDEPENDENT

1283.

How can hydrated salt be converted into any hydro salt give an examplepls help memy exams are there please help pls​

Answer»

ANSWER:

by MIXING SALT of MG or CA

1284.

2. Which of the following is not a chemical change?(a) Rusting of iron(b) Formation of snow flakes(c) Coagulation of blood(d) Decaying of vegetables​

Answer»

Answer:

option c

Explanation:

coagulation of blood is RIGHT answer.

hope this helps you MATE

1285.

(intermolecular6. The space that exists between the particles of matter is called thespace/intramolecular space).​

Answer»

ANSWER:

INTERMOLECULAR spaces

hope it HELPS U

1286.

5.(Photosynthesis/Making gold jewellery) is a chemical change.​

Answer»

EXPLANATION:

photosynthesis is a chemical CHANGE but making GOLD JEWELLERY is a physical change

1287.

4. Non-metals do not(expand/contract) on heating​

Answer»

ANSWER:

non-metals do not CONTRACT

1288.

Calculate the number of particles present in 54 gram of aluminium atom​

Answer»

The number of aluminium ions present in 54 g of aluminium

GC ATOMIC Structure

The number of aluminium ions present in 54 g of aluminium (atomic weight 27) is

2

18

1.2 X 1024

1.1 x 1024

Answer

From mole CONCEPT, 27 g has 6.022×1023 ions.

54 g will have 2 x 6.022×1023 = 1.2 x 1024

The correct option is C.

1289.

Two application of expansion and constract of material​

Answer»

ANSWER:

Applications of Expansion and CONTRACTION of materials :

•The jammed metal lid of a jam jar can be opened by heating. The jar is INVERTED and just the lid is dipped in hot water.

•The fact that materials expand on heating is USED in thermometers.

Hope it helps

1290.

4. गोलों के घनाकार सीमित पैकिंग और षट्कोणीय सीमित पैकिंग का उल्लेख​

Answer»

ANSWER:

SORRY I don't KNOW this answer

1291.

Draw theatomic structure of sulphur -2​

Answer»

Answer:

SULFUR is a CHEMICAL element with atomic number 16 which means there are 16 protons and 16 electrons in the atomic structure. In the CASE of Sulfur the valence electrons is 2,4,6. this is an ion, meaning it has either LOST of gained electrons to become more stable.

Explanation:

Check this attachment for more info.

Mark me as BRAINLIEST

1292.

Please answer this question I will give them brillant and 1000 diomands topup so please​

Answer»

Answer:

ATOMICITY of nitrogen is 2 ..it is in the form of N2

Sulphur is 8 i.e S8

argon and Krypton is 1 i.e Ar , Kr

Iodine is 2 i.e I2

phosphorous is 4 i.e P4

among them both nitrogen and iodine have atomicity 2.

Atomicity is no of atoms present in a molecule.

order of the above ELEMENTS is

Ar=kr,N2=I2,P4,S8

1293.

Please answer this I will give them brillant Wright now please ​

Answer»

ANSWER:

I don't no

.

.

.

..

.

.

.

.

.

.

.

.

.

.

.

..

1294.

Is position of hydrogen justified in modern periodic table ?

Answer»

\huge{\mathfrak{\blue{Answer}}}

In the PERIODIC table the position of hydrogen is ambiguous but generally it is placed at the top of group 1 above the alkali metals. This is because the ELECTRONIC configuration of hydrogen is similar to alkali metals. ... HOWEVER because of its SMALL size the properties of hydrogen do not match with the alkali metals.

1295.

Please answer this answer I will five them brillant and I will give them 500 diamonds top up Wright now so please answer fast ​

Answer»

Answer:

1 Zinc + WATER gives zinc oxide + hydrogen

2 CALCIUM CARBONATE gives calcium oxide + carbon dioxide

3 MAGNESIUM + oxygen gives magnesium oxide

4 sodium hydroxide + hydrochloride acid gives sodium chloride(salt) +water

Explanation:

Hope this helps if it was HELPFUL then please mark me as the brainliest

1296.

Which will be more stable s- atom or s -2 ? give reason​

Answer»

Answer:

35+"+-_168+'cdjmkxwu269/+_#369(!_#₹+8_33_&+6

1297.

Tumhe Kya laga Kon hoga ISS account meh ?​

Answer»

Answer:

HLW SUJIT

OK PAR YAA NHI

HANGOUT USE KARONGE

TAB FACE REVEL VAHA KARONGE

OK

GOOD AFTERNOON

HAVE A BEAUTIFUL DAY AHEAD ☺️✌️

TC

1298.

FFS a as I can get tiu h a good day at work and I don't know what I want to go tt​

Answer»

Explanation:

f go f go R U doing today BEAUTIFUL I HOPE so

1299.

How to balance a chemical equation i want it with perfect explanation

Answer» A balanced chemical equation is as  when the number of atoms  oneach side of the equation is the equal. for example  if you have 12 hydrogenson the LEFT hand side of the equation, you must have 12 hydrogens on the righthand side, if there are 4 OXYGENS on the left, there must  be 4 oxygens on theright, and so on. This is because of the law of conservation of MASS - youcan't create or destroy atoms during a chemical reaction. But you can't justadd atoms.To balance that element, MULTIPLY the chemical species on the side whichdoesn't have enough atoms of that type by the number required to BRING itup to the same as the other side.         

                                
                                     a. If the selected element is already balanced, put the SAME letter coefficient at its blank lines.b. If the element is not balanced, putfirst the letter coefficient at the side with the GREATER number ofatoms for that element, and balance the other side in terms of the sameletter coefficient. For example, the letter coefficient could be “a” andthe coefficient for the other side could be “2a”.c. Repeat step 1, if needed, with another letter coefficient.                                
1300.

Why did mandeleev leave some gaps in his perodic table

Answer» BEACAUSE he KNEW that more ELEMENTS will be DISCOVERED in the FUTURE...