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b,d are correct for ionic compoundsExplanation:Ionic COMPOUNDS are soluble in water hence first statement is wrong & they are good CONDUCTOR of electricity c is ALSO wrong.

The increasing order of electron affinity VALUES of O,S and Se is. SOLUTION : O has exceptionally smaller value of electron affinity (-141kJ-1mol) due to smaller atomic size than sulphur ( WEAKER electron-electron repulsion in 3p- subshell). It is LESS tha Se and Te ALSO.

HOPE IT HELPS I.I.IExplanation:Hydrogen is the first element of the periodic table as its atomic number is one, which means it has only one electron in its atom and THUS only one electron is PRESENT in its outermost SHELL.

⠀ ⠀ ⠀FERMENTATION⠀ ⠀The TEMPERATURE, pH, and sugar concentration of the fermentation broth are important factors to meet the requirements of the microorganisms to FACILITATE the reactions. The action of the microorganisms is affected by POSSIBLE impurities, as well as their own by-products.⠀⠀ ⠀⚠ 21♥f IｏN l B l O o X ｗ

tion:The work PERFORMED by the SURROUNDINGS on the system as the piston moves inward is given by w = PextΔV. Thus 0.08206 L·atm = 8.314 J and 1 L·atm = 101.3 J. The work DONE by a gas expanding against an external PRESSURE is therefore negative, corresponding towork done by a system on its surroundings.

The metals which are soft are... 1) Sodium (NA) 2) Potassium (K) The non-metal which is HARD 1) DIAMOND... (a form of carbon) hope this will help u... ☺️

ive nuclear CHARGE” is a concept that helps to understand how strongly the OUTER-SHELL electrons are held by the atom.The value is obtained adding the charges on the nucleus and all the non-outer-shell electrons.So a chlorine atom, atomic number 17:The nucleus has a charge of +17The electron configuration is 1s2 2s2 2p6 3s2 3p5.The outer shell is #3. If you count all the other electrons (in shell 4s #1 and #2), you find 10. Ten electrons have a combined charge of -10.So the effective nuclear charge = +17 + (-10) = +7.

They are CALLED ORGANIC FERTILIZERS

0.04604 Sig Figs 4 Decimals 5 SCIENTIFIC Notation 4.604 × 10-2 WORDS ZERO point zero FOUR six zero fourExplanation:

To CONVERT g/cm3 to KG /m319300 kg/m3 KINDLY MARK me as BRAINLIEST..

tion:Atomic Number Name of the Element Electronic Configuration1 Hydrogen (H) 1s12 Helium (He) 1s23 Lithium (Li) [He] 2s14 Beryllium (Be) [He] 2s25 Boron (B) [He] 2s2 2p16 Carbon (C) [He] 2s2 2p27 Nitrogen (N) [He] 2s2 2p38 Oxygen (O) [He] 2s2 2p49 Fluorine (F) [He] 2s2 2p510 Neon (Ne) [He] 2s2 2p611 Sodium (Na) [Ne] 3s112 Magnesium (Mg) [Ne] 3s213 Aluminium (Al) [Ne] 3s2 3p114 Silicon (Si) [Ne] 3s2 3p215 Phosphorus (P) [Ne] 3s2 3p316 SULFUR (S) [Ne] 3s2 3p417 Chlorine (Cl) [Ne] 3s2 3p518 Argon (AR) [Ne] 3s2 3p619 Potassium (K) [Ar] 4s120 Calcium (Ca) [Ar] 4s221 Scandium (Sc) [Ar] 3d1 4s222 Titanium (Ti) [Ar] 3d2 4s223 Vanadium (V) [Ar] 3d3 4s224 CHROMIUM (Cr) [Ar] 3d5 4s125 Manganese (Mn) [Ar] 3d5 4s226 Iron (Fe) [Ar] 3d6 4s227 Cobalt (Co) [Ar] 3d7 4s228 Nickel (Ni) [Ar] 3d8 4s229 Copper (Cu) [Ar] 3d10 4s130 Zinc (Zn) [Ar] 3d10 4s2The electronic configuration of first 30 ELEMENTS with atomic numbers listed above corresponds to the ground state of the specific elements. Any configuration that does not correspond to the lowest energy state is called an excited state.please mark as the brainliest

Glucose and FRUCTOSE differ in their STRUCTER at 1st two carbon atom c1 and c2 only. In osazone formation there two carbon ATOMS take part in the reaction and during osazone formation the STRUCTURAL dissimilarities at c1 and c2 disapears . HenExplanation:HOPE it helps

Q1: A chemical reaction has a reaction enthalpy of +430 kJ/mol.Is it endothermic or EXOTHERMIC 02:A chemical reaction has a reaction enthalpy of -512 KJ/mol. Is it endothermic or exothermic03: Decide WHETHER each of these reactions are exothermic or endothermicExplanation:PLEASE MARK me brainliest

Current IssueSIGN IN SUBSCRIBE Answer :with the first spell of monsoon in mid-June people in Bargarh, Nuapada, Kalahandi and Sambalpur districts in Orissa experienced something they had never seen before: a grayish layer on leaves, vehicles and elsewhere. "I was surprised to see the leaves of trees in my medicinal plant nursery covered with white and grey mud-like substances," said Biswanath Hota, a retired divisional forest officer, who BELIEVED it to be acid RAIN. Hota quickly sent samples of leaves from his nursery in Bhawanipatna, Kalahadi, to his friend Durga Prasad Nayak, an environmental activist. Nayak took the samples to the Sambalpur University's Department of Environmental Sciences for testing evidence of acid rain. P C Mishra, a professor in the department, did not find any trace of acid rain in them, but he did not rule out the incidence of acid rain."What I got was a bunch of leaves that had been collected a few days ago and had changed hands many times. So it was difficult to do a proper scientific analysis," said Mishra. "This being a forested area with no industries, I am surprised that this kind of rain has occurred. One could also say it is fly ash, which has travelled hundreds of kilometres from industrial belts. It's worrying and needs a thorough scientific study."Mishra warned that increased dust concentration can affect crop productivity. "In my study of the area around mcl coal operations, I found that coal dust had severely affected plant growth and productivity. Dust on the leaf surface retards plant productivity," he said.Arttabandhu Mishra, a retired professor of the university, suspects the rain was caused by Orissa's thermal power belts of Angul-Talcher and Ib Valley. "Burning coal is the main cause of acid rain and Orissa's two big coal fields emit over 320 tonnes of sulphur DIOXIDE, 919 tonnes of nitrogen oxide and 33,883 tonnes of carbon dioxide. Acid rain can travel up to 400 km, and surely the rain in the region was acid rain," he said.Sitikanta Sahu, regional manager, Orissa Pollution Control Board, said, "We have asked our Rayagada regional officer to find samples of the first spells of rain for testing the Ph level. Acid rain is a concern but we cannot be sure that it was due to coal fields of Orissa. Industrial units in Maharashtra and Chhattisgarh could also have caused this."Whatever the cause, FARMERS are worried about the impact of the unusual substance on crops. Land in western Orissa is already going barren. With a severely depleted forest belt around coal reserves and thermal power plants, the negative impacts of acid rain would be phenomenal, said Arttabandhu Mishra.Nayak accused the government of failing to respond to weather signals. The Padampur-Nuapada region experienced smog for 25 days in February-March. "Everyone was scared and the media also raised the issue. However, the government and the pollution control board did nothing," said Nayak.Please mark me brainlist

Water evaporates from the watch glass. This is because on HEATING water CHANGES into its VAPOUR STATE. The ink does not evaporate or SUBLIME.

Because the outermost shells of the elements with low ATOMIC numbers (up to calcium, with atomic number 20) can hold eight electrons, this is referred to as the octet rule. An element can donate, accept, or share electrons with other elements to fill its OUTER shell and satisfy the octet rule.Explanation:if U like the ans PLZ mark me brainlist and follow me

The English Channel, ALSO called simply the Channel, is an arm of the Atlantic Ocean that separates Southern England from northern FRANCE and LINKS to the southern part of the NORTH Sea by the Strait of Dover at its northeastern end. It is the busiest shipping AREA in the world.Kindly mark me as brainliest....plzzzhope u like my answer..

your ANSWER is O3>NO2->NOFExplanation:please make brainliest

Calcium is the correct ANSWER..Hope it HELPS you...THANK you

tion:"Burning coal is the main cause of acid RAIN and Orissa's TWO big coal fields emit over 320 tonnes of sulphur dioxide, 919 tonnes of NITROGEN oxide and 33,883 tonnes of carbon dioxide. ... Land in western Orissa is already going BARREN.

Hydrogen +oxygen = waterAtomic MASS of Hydrogen = 1Atomic mass of H2 = 1X2 = 2Atomic mass of Oxygen = 16H2 +O2:161:8Kindly MARK me as BRAINLIEST...plzzz

A PARTICLE in a 1-dimensional box is a fundamental quantum mechanical approximation describing the translational motion of a single particle CONFINED inside an infinitely deep well from which it cannot escape.Kindly mark me as brainliest....plzzzzhope u like my answer.....HOPW it will be USEFUL

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It is given that the quantisation RULE followed in aliens' planet is as follows:mvr= 4πnh The change in quantisation rule will not AFFECT the energy difference.The energy difference (in EV) is given by the expression =E n −E n′ =−13.6×[ n 2 1 − n ′2 1 ]We need to find the energy difference between fourth and second orbits.E 4 −E 2 =−13.6[ 4 2 1 − 2 2 1 ]E 4 −E 2 =−13.6×[0.0625−0.25]=−13.6×(−0.1875)=2.55 eVHence, the energy difference between fourth and second orbits for H ATOM is 2.55 eVExplanation:hope it helps

If a compound ROTATES PLANE polarized light in the clockwise (+) direction, it is said to be dextrorotatory, while if it rotates light in the counterclockwise (-) direction it is levorotatory. ... Different enantiomers of a compound will always ROTATE plane-polarized light with an EQUAL but opposite magnitude.HOPE IT HELPS ..................

tion:In contrast, the larger alkali metals—potassium, rubidium, and cesium—react with oxygen in AIR to GIVE the METAL superoxides. Because the Na + cation is intermediate in size, SODIUM reacts with oxygen to form a compound with an intermediate STOICHIOMETRY: sodium peroxide

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Atoms consist of three basic particles: protons, electrons, and neutrons. The nucleus (center) of the atom CONTAINS the protons (POSITIVELY charged) and the neutrons (no charge). The OUTERMOST regions of the atom are CALLED electron shells and contain the electrons (negatively charged).

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ital diagrams are given below.Explanation:Magnesium CHLORIDE:The atomic NUMBER of magnesium is 12 AD that of chloride is 17.ELECTRONIC configuration of magnesium is 2,8,2 and chlorine is 2,8,7 It has two-electron is the outermost shell.Therefore two chlorine atoms ill combine with it to form MgCl2.Hydrogen chloride:The electronic configuration of hydrogen is 1 and that if chlorine is 2,8,7.Calcium Oxide:Electronic configuration of calcium is [AR}4s^2 and that of oxygen is 2,6.

There are MANY examples such as:MILK and water,ALCOHOL and water,SALT and water,INK and water, etc.

The fundamental mechanism is the TOWNSEND discharge, which is the sustained multiplication of electron FLOW by ion impact when a critical value of electric field STRENGTH for the density of the GAS is REACHED.

polar covalent bond Explanation:due to DIFFERENCE of electronegativity oxygen is more ELECTRONEGATIVE than HYDROGEN and CREATE charges partial positive and NEGATIVE