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51501.

The numbers of electron in neutral atom of an element is equal to its

Answer» PLEASE MARK me as BRAINLIEST
51502.

(a) 3d श्रेणी के तत्वों के ऑक्सीकरण अवस्थाओं के स्थायित्व की 4d तथा 50 श्रेणी के तत्वों से तुलना कीजिए।​

Answer»

Program to find the largest number AMONG two numbers USING ternary operator.// C++ program to find largest among // two numbers using ternary operator#include using NAMESPACE std;

51503.

Neha and Rita went shopping. Neha wore a cotton dress and Rita wore a synthetic dress. It was a hot summer day. Who wore a more appropriate fabric? Give reason.​

Answer»

Neha WORE a more APPROPRIATE fabric because in summer cotton CLOTH absorb more sweat than SYNTHETIC clothes

51504.

What happened when metal react with acid​

Answer»

: ACIDS react with most metals to form hydrogen GAS and SALT. ... When an acid reacts with METAL, salt and hydrogen gas are produced.

51505.

व्हिच ऑफ द फॉलोइंग स्टेटमेंट अबाउट द इलेक्ट्रॉनिक इज इनकरेक्ट ​

Answer» TION:kjvjgccuogcxsseruiyxxhigx
51506.

(f) ZnO + HNO3 → Zn(NO3)2 + H2O​

Answer»

this is the ANSWER of your QUESTIONS

51507.

What happen carbon monoxide react with kerosene​

Answer»

required answer -:A kerosene HEATER, as any heater that uses organic FUEL, can produce dangerously high amounts of soot and carbon monoxide when running out of oxygen. Failure to follow safety precautions COULD result in ASPHYXIATION or carbon monoxide POISONING.

51508.

Convert phenol into salicylic acid​

Answer»

Phenol is converted to salicylic acid by Reimer-Tiemann REACTION. In this reaction, ortho hydroxyl benzaldehyde and ortho hydroxyl BENZOIC acid are obtained. There are two ways in which the reaction happens in the presence of different chemicals. When the reaction is carried out in the presence of NAOH and chloroform, the product obtained is ortho hydroxyl benzaldehyde. When the reaction is carried out in the presence of NaOH and carbon TETRACHLORIDE, the product obtained is ortho hydroxyl benzoic acid which is also known as salicylic acid.#diyaa

51509.

Mention the co-ordination number of each sphere in Body-centred close-packedstructureFace - centred close-packedstructure​

Answer»

The face-centered cubic (fcc) has a COORDINATION number of 12 and contains 4 atoms per unit cell. The body-centered cubic (bcc) has a coordination number of 8 and contains 2 atoms per unit cell. The SIMPLE cubic has a coordination number of 6 and contains 1 ATOM per unit cell.hope it helps

51510.

What happens when chlorine react with kerosene​

Answer» SAID U to not spamgdnnfsurakgeagdnngdnnfsurakgesthmsthmyj.sfmtehmeth TH2
51511.

What happens when hyodogen react kerosene​

Answer»

try this one and mark me the brainliest and follow for moreExplanation:Metals and Non-metals I n Class IX you have learnt about various ELEMENTS. You have seen that elements can be classified as metals or non-metals on the basis of their properties. n Think of some uses of metals and non-metals in your daily life. n What properties did you think of while categorising elements as metals or non-metals? n How are these properties related to the uses of these elements? LET us look at some of these properties in detail. 3.1 PHYSICAL PROPERTIES 3.1.1 Metals The easiest way to start grouping substances is by comparing their physical properties. Let us study this with the help of the following ACTIVITIES. For performing Activities 3.1 to 3.6, collect the SAMPLES of following metals – iron, copper, aluminium, magnesium, sodium, lead, zinc and any other metal that is easily available. Activity 3.1 n Take samples of iron, copper, aluminium and magnesium. Note the appearance of each sample. n Clean the surface of each sample by rubbing them with sand paper and note their appearance again. Metals, in their pure state, have a shining surface. This property is called metallic lustre. Activity 3.2 n Take small pieces of iron, copper, aluminium, and magnesium. Try to cut these metals with a sharp knife and note your observations. n Hold a piece of sodium metal with a PAIR of tongs. CAUTION: Always handle sodium metal with care. Dry it by pressing between the folds of a filter paper. n Put it on a watch-glass and try to cut it with a knife. n What do you observe? 2020-21

51512.

Take a piece of springy steel wire or hairpins. Straighten one end of the steel and hold one end with tongs Heat the centre of the other half in the flame until it is red hot. Shift it slowly higher in the flame and hold it for a while. • Finally remove it and let it cool on a tile. When it is cool, pick it up and try to bend it in your fingers. Try to bend both halves with your fingers. Review Questions 1. How do the 2 halves compare (bendability)? 2. How has the springy steel change its property after being heated and slowly cooled? 3. What process have you carried out on the steel wire? 4. What does the process do to the springiness of the steel?

Answer»

Annealing alters the physical and chemical properties of the metal to increase ductility and reduce hardness. This facilitates shaping, stamping or forming PROCESSES, and allows the metal to be cut more easily. Annealing also enhances electrical conductivity.Tempering, in metallurgy, process of improving the characteristics of a metal, especially steel, by heating it to a high temperature, though below the MELTING point, then COOLING it, usually in air. The process has the effect of toughening by LESSENING brittleness and reducing internal stresses.In principle, when steel cools quickly, there is less time for carbon atoms to move through the lattices and form larger carbidesThe temperatures metals are heated to, and the rate of cooling after heat TREATMENT can significantly change metal's properties. ... It softens metal, making it more workable and providing for greater ductility. In this process, the metal is heated above its upper critical temperature to change its microstructure.

51513.

Cotton and jute are grown in a) loamy b) clayey c) sandy

Answer» TION:) loamyhope it HELPS you
51514.

Crops like potatoes grow in a) Clayey b) Loamy c) sandy

Answer»

Crops LIKE potatoes GROWS in clayey SOIL.

51515.

No dark spaces between the colours are present in.

Answer»

no DARK SPACES between the COLOURS are PRESENT in.

51516.

State a change which is desirable as well as undesirable.Give reason.​

Answer»

burning of FUEL is desirable when USED for HEATING of cooking but burning is undesirable when a house a factory is burnt in FIRE. burning of WOOD is desirable when needed for cooking but burning of wood is undesirable when it causes pollution.

51517.

In the reaction so2 + 2Hs _2H₂O+ sts the reducing agent is el​

Answer»

xidation-reduction (redox) reaction is a type of chemical reaction that involves a transfer of electrons between two species. An OXIDATION-reduction reaction is any chemical reaction in which the oxidation number of a molecule, atom, or ion CHANGES by GAINING or LOSING an electron.please MARK me brain mark list

51518.

Answer in one word : 1) Name an element having the properties of both metal and non-metal. 2) The method used in the separation of miscible liquid-liquid mixtures. 3) Name the most abundant element in the universe. 4) The state of matter which has high rigidity and non-compressibility.5) Solids and liquids co-exist at their _______ .​

Answer»

on2.Distillation3.Hydrogen4. Solid5.melting POINT

51519.

Classify the following on the basis of energy changes : 1) Melting of ice. 2) Burning of coal.3) Burning of magnesium ribbon. 4) Evaporation of spirit. 5) Dissolution of quicklime in water.​

Answer» L Changechemical changechemical changePhysical Changechemical CHANGEPLEASE MARK me BRAIN mark LIST
51520.

Classify the following into physical or chemical change : 1) Growth in plants.2) Formation of curd.3) Melting of wax.4) Dissolving of sugar in water.5) Rusting of Iron​

Answer» CHEMICAL CHANGE 1,2,3,5physical change 4
51521.

I mol liq A t f 2 mol liq B mixed together at 8⁰°c to are form ideal liquid solution. The boiling point of solution ex . 80°C Then find pressure of vapour pressure 660 mm ng + if vapour

Answer»

nch 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.

51522.

What is the chemical formula of Washing Soda​

Answer» WASHING SODA is a CHEMICAL compound with the formula Na2CO3, also known as SODIUM carbonate, and it's a SALT of carbonic acid.
51523.

Time taken for the same volume of water and benzene to flow in viscometer at 20°C have been found to be 120 seconds and 88 seconds respectively. The density of benzene at this temperature is 9.879 g cm–3. If the absolute viscosity of water at 20°C is 10.05 × 10–3 poise, calculate the specific viscosity of benzene at this temperature.

Answer»

wdxojgwl jcwpjwfpiigfwpidcedojvdouduvbpjffhvpeehvpif HC prirrgf ripcrExplanation:kfnccffjjfjfjhdjdhdbfbfibdcbcpjbdjpbibhovohvohvkvojvovohvvovljvvojvohvjovojvohvohvohvohvhoohvohhovohhvouvouvouvouuvvovovucoucouycihcihcoyiyiycciyciyycih

51524.

Explain the formation of cation and anion in AlCl3.

Answer»

animon in AICI3 is ANSWER

51525.

Choose the correct option for solid solution — a) Alcohol in waterb) Airc) Sea waterd) Alloys​

Answer» SEA waterExplanation:MAKE me as a BRILLIANT
51526.

Name two properties due to which a change becomes noticeable.​

Answer»

The following are indicators of chemical CHANGES:Change in Temperature.Change in Color.Noticeable ODOR (after reaction has BEGUN)Formation of a Precipitate.Formation of BUBBLES.

51527.

Which of the following does not react with cold water 1-fe2-Na3-k4-Ca​

Answer» TION:the CORRECT ANSWER is OPTION no 3
51528.

1.5 grams of salt is dissolved in 24 grams of water. Calculate the percentage amount of the salt in the solution​

Answer» SORRY BRO I don't KNOW sorry OKAY!!!!
51529.

Question. Using balanced chemical equation example the difference between a displacement reaction and double displacement reaction.​

Answer» PLEASE MARK me as BRAINLIEST please
51530.

I Fill in the blanks (2x1M) 1 At 20 degree centigrade the possible state of water will be _________.2 The particles of matter ______ each other.II True and False (2x1M)1 Smell of perfume is matter.2 The particles of matter are very small they are small beyond our imagination.​

Answer»

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51531.

Why should plastic be not thrown in the garbage places​

Answer»

Long term usage and EXPOSURE of plastics and plastic PRODUCTS to high temperature can lead to leaching of TOXIC chemical constituents into food, DRINKS and water. Indiscriminate disposal of plastics on LAND and open air burning can lead to the release of toxic chemicals into the air causing public health hazards.

51532.

5. A shiny brown-coloured metal 'X' on heating in air forms a black coloured compound 'Y.On passing hydrogen gas through compound 'Y', metal 'X' and water are obtained. a) Identify X and Y. b) Name the type of reaction.

Answer»

a) X - copper Y- CuO B) SINGLE DISPLACEMENT REACTION

51533.

What is this sort of reaction called​

Answer»

the five BASIS type of chemical reaction are combustion, combination, decomposition, SINGLE replacement and double replacement EXPLANATION:I HOPE my answer is correct

51534.

A container has an equal mass of H2, O2 and CH4 at 27°C. What is the ratio of their volume?​

Answer»

16 : 1 : 2Explanation:Let the mass of each gas be given by W. So.... No of moles of H2 are= w/2         No of moles of O2 are= w/32         No of moles of CH4  are= w/16 THEREFORE ... VOLUME of H2 = w/2 * 22.4L                     Volume of O2 is= w/32 * 22.4L                     Volume of CH4 is given as= w/16 * 22.4L So the ratio will be = 1/2 : 1/32 : 1/16                                = 16: 1 : 2

51535.

Why is garbage disposal an important issue?​

Answer»

Hlo here is your answerExplanation:Encourages health STANDARDS. Not only does following WASTE DISPOSAL procedures help keep the environment clean, but it also makes the community's overall health standards BETTER. With waste being properly disposed of, our environment is cleaner, meaning there are fewer health risks and hazards around to affect us.I HOPE IT HELPS YOU(•‿•)

51536.

What is Rearrangement reaction? Explain with examples.​

Answer»

What is REARRANGEMENT reaction with EXAMPLE? Usually, straight-chain alkanes are converted by heating in the presence of a catalyst to branched isomers. Examples include n-butane isomerization to ISOBUTANE and pentane to isopentane. Highly branched alkanes have favourable PROPERTIES for internal combustion engines.

51537.

What is Substitution reaction? Explain with examples. ​

Answer»

itution reaction (also known as SINGLE displacement reaction or single substitution reaction) is a chemical reaction during which one functional group in a chemical COMPOUND is replaced by another functional group. ... A good EXAMPLE of a substitution reaction is halogenation.please MARK me brain mark LIST

51538.

What is Decomposition reaction? Explain with examples.​

Answer»

position reaction occurs when one reactant breaks down into two or more products. This can be represented by the GENERAL equation: AB → A + B. Examples of decomposition reactions INCLUDE the breakdown of hydrogen PEROXIDE to water and OXYGEN, and the breakdown of water to hydrogen and oxygen.

51539.

What is combination reaction? Explain with examples. ​

Answer»

When two or more reactants combine with each other to form a NEW product it is called as combination reaction. Combination reaction is also KNOWN as synthesis reaction. For EXAMPLE hydrogen gets COMBINED with chlorine to from hydro-chloride.Hope its helpful

51540.

The number of radial nodes for 3p ortibal is _​

Answer»

tion:The NUMBER of nodes is RELATED to the principal quantum number, n. In general, the np orbital have (n - 2) radial nodes. Therefore, the 3p-orbital has (3 - 2) = 1 radial nodes, as shown in the above plot.

51541.

Q23. The de-Broglie wavelength of a ball of mass 10g moving with a velocity of 10ms-lis: [h=6.626x10-34 Js] * O a) 6.626x10-33 m Ob) 6.626x10-29m O c) 6.626x10-31 O d) 6.626x10-36m​

Answer» OPTION a is the CORRECT ANSWER
51542.

The heisenbeng Principle S totes that​

Answer»

At the foundation of quantum MECHANICS is the Heisenberg UNCERTAINTY principle. Simply put, the principle STATES that there is a fundamental LIMIT to what ONE can know about a quantum system. For example, the more precisely one knows a particle's position, the less one can know about its momentum, and vice versa

51543.

Explain the formation of bond in NH3 and Cl2 molec

Answer»

In covalent bonds, LIKE chlorine gas (Cl2), both atoms share and hold tightly onto each other's electrons. ... Some covalently bonded molecules, like chlorine gas (Cl2), equally share their electrons (like two equally STRONG puppies each holding both bones).A triple covalent bond is when three pairs of electrons are being shared between two atoms. An oxygen gas molecule (O2) exists as a pair of oxygen atoms joined together by a double covalent bond. Two pairs of electrons are shared by the two atoms. These four electrons spin around the atoms holding them together.Beacuse ionic COMPUNDS have tendency to DONATE their electron for the formation of ionic bond. ... It is three single covalent bond, because one valence electron of each of three atom of hydrogen is shared with three electron. Thus leading to formation of three single covalent NH3.

51544.

Heating of freezing food is known as

Answer»

n order to lower the TEMPERATURE of 1g of water by 1oC, at temperatures above 0oC, 1 calorie of heat must be removed this is KNOWN as the “specific heat”. However, to change water at 0oC to ice at 0oC, 80 calories must be removed for each G of water.Explanation:

51545.

Find the molecular weight of the following compounds- a) Ca( HCO3)2 b) (NH4)3PO4 c) Fe2(SO4)3 [ Ca=40, H=1, C=12, O=16, N= 14, P=31, Fe=56, S=32 ]​

Answer»

:-→ Molecular mass of Ca(HCO₃)₂ is 162 u .→ Molecular mass of (NH₄)₃PO₄ is 149 u→ Molecular mass of Fe₂(SO₄)₃ is 400 u .Explanation :-The atomic masses of elements are given as :-• Calcium = 40 u ; Hydrogen = 1 u• Carbon = 12 u ; Oxygen = 16 u• NITROGEN = 14 u ; Phosphorus = 31 u• Iron = 56 u ; Sulphur = 32 u______________________________Number (a) :-The given compound is Ca(HCO₃)₂ i.e. "Calcium bi-carbonate" .Molecular weight will be :-= 40 + (1 + 12 + 16 × 3)2= 40 + (13 + 48)2= 40 + (61)2= 40 + 122= 162 uNumber (b) :-The given compound is (NH₄)₃PO₄ i.e. "Ammonium PHOSPHATE" .Molecular weight will be :-= (14 + 1 × 4)3 + 31 + 16 × 4= (14 + 4)3 + 31 + 64= (18)3 + 95= 54 + 95= 149 uNumber (c) :-The given compound is Fe₂(SO₄)₃ i.e. "Ferric Sulphate" .Molecular weight will be :-= 56 × 2 + (32 + 16 × 4)3= 112 + (32 + 64)3= 112 + (96)3= 112 + 288= 400 u

51546.

Question. Identify the types of reaction in the following example a) Na2SO4+BaCl2 - BaSo4+2NaCl b) N2+3H2 - 2NH3c) 2pb(NO3)2 - 2pbo+4No2+O2d) Zn-2agNO3 - Zn(NO3)2+2ag​

Answer»

a) Na2SO4+BaCl2 - BaSo4+2NaCl B) N2+3H2 - 2NH3c) 2PB(NO3)2 - 2pbo+4No2+O2d) ZN-2agNO3 - Zn(NO3)2+2ag

51547.

24 Write the complete symbol for the atom with the given atomic number (Z) and atomic mass (A) (i) Z = 17, A = 35. (ii) Z = 92, A = 233. (iii) Z = 4, A = 9​

Answer»

(i) The atom with ATOMIC number 17 and mass number 35 is CHLORINE. Its complete SYMBOL is 1735 Cl.(ii) The atom with atomic number 92 and mass number 233 is uranium. Its complete symbol is 92233 U.(iii) The atom with atomic number 4 and mass number 9 is beryllium. Its complete symbol is 49 Be.

51548.

[Fe (CN)6 is -3 an inner orbital Complex while [fef6] is -3 an Outer compless why​

Answer» NCH 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.
51549.

Explain any 2 factors affecting electron gain enthalpy​

Answer» FACTORS Affecting electron gain enthalpy : ... With increase in effective nuclear charge , electron gain enthalpy INCREASES . ATOMIC size : Electron gain enthalpy is inversely proportional to atomic size , with increase in atomic size , value of electron gain enthalpy DECREASE .
51550.

Convert the following temperature to - 1) = Kelvin scale = 40°C , 78°C , 250°C 2) = Celsius scale= 325K , 485K , 543K​

Answer» TION:CONVERT Celsius into KELVIN add 273if we need to convert Kelvin into Celsius minus 273