Explore topic-wise InterviewSolutions in Current Affairs.

ANSWER:

COPPER

Explanation:

copper is INSULATOR

(1) change in state

(2)change in colour

(3)evolution of GAS

(4)change in TEMPERATURE

ANSWER:

REFER to the ATTACHMENT

EXPLANATION:

positively charged -protons

negatively charged-ELECTRONS

no of electrons in last SHELL of the atom -VALENCE electrons

no of valence electrons or 8-the no of valence electrons -valency

hydrogen=1

helium =

lithium=1

berylium=2

boron=3

carbon=4

nitrogen.=3

oxygen =2

fluorine=1

The EQUATION is as above

ANSWER:

Hopanoids

Mark as BRAINLIEST

ANSWER:

As we know that there are seven fundamental SI units which are used to find DERIVED units

These seven quantities along with their units are as follows:

Physical Quantity  - Unit

1). MASS - Kilogram

2). LENGTH - meter

3). Time - Seconds

4). Electric Current - Ampere

5). Amount of substance - Moles

6). Intensity of light - Candela

7). Temperature - Kelvin

ANSWER:

this REACTION is like this:- CH3Br==CH3Br + 2Na -------dry ether---→CH3- Ch3+ 2Nabr

Litmus paper is probably the most familiar PH paper. It is USED to BROADLY test whether a SOLUTION is acidic or BASIC and comes in 3 types—red, blue, and neutral.

ANSWER:

HYDROGEN is primarily produced by steam reforming of natural gas. Other MAJOR sources INCLUDE naphtha or oil reforming of refinery or other industrial off-gases, and partial oxidation of coal and other hydrocarbons. A small amount is obtained by water electrolysis and other sources.

Answer:

Aluminum nitride

PubChem CID: 90455

Structure: FIND Similar Structures

Chemical SAFETY: Laboratory Chemical Safety SUMMARY (LCSS) Datasheet

Molecular FORMULA: AlN

Chemical Names: Aluminum nitride Aluminium nitride Aluminum nitride (AlN) 24304-00-5 UNII-7K47D7P3M0

Answer:

yes

Explanation:

Among them, oxygen is HIGHLY electronegative and hydrogen has good electron sharing abilities. Thus, hydrogen atoms of one GLUCOSE molecules can form hydrogen BOND with oxygen in water. ... This is what MAKES glucose to DISSOLVE in water though it is a covalent molecule

The Trisoxalatochromate(III) is the COORDINATION SPHERE and pottasium is COUNTER ion

EXPLANATION:

Nucleic acids are polynucleotides—that is, long chainlike molecules composed of a series of nearly IDENTICAL building blocks called nucleotides. Each NUCLEOTIDE consists of a nitrogen-containing AROMATIC base attached to a pentose (five-carbon) sugar, which is in turn attached to a phosphate group.

⏩ When 3.0g of carbon is burnt in 8.00g of oxygen, 11.00g of carbon dioxide is formed. It means all of carbon and oxygen are used up and carbon and oxygen are combined in the ratio of 3: 8 to. FORM carbon dioxide. Thus, when there is 3g of carbon and 50.0g oxygen, then also only 8g of oxygen will be used and 11.0g of carbon dioxide will be formed. The remaining oxygen is not used up. This indicates the law of definite proportions which says that in compounds, the combining elements are present in definite proportions by mass.

✔✔✔✔✔✔

Hope it helps...:-)

⭐❤✨♥⭐❤✨♥⭐

Be Brainly...✌✌✌

♣ WALKER ♠

Explanation:

the ans is the ALKALI metals. They consistently have similar properties and OXIDATION STATES, as do their compounds.

In alkaline earth metals, beryllium and magnesium tend to FORM compounds with different properties, such as SOLUBILITY, from the other alkaline earth metals.

ANSWER:

indicators are SUBSTANCES which indicates that the SUBSTANCE on which it is tested are a ACID or a base.

phenol red is a indicator.

its colour in acid is YELLOW.

ANSWER:

fdifxkgxgjlzjfspigxjflxgjchofhpffpohdohdlgdkgxitskgwo

Answer:

DESIRABLE change :the changes which are desired (need) to be changed are called as desirable changes. EXA- change of MILK to curd. Repending of FRUIT. Etc. Undesirable change - the change which are not to change is called undesirable change.

NaNO3 + CU+ H2SO4 = FE(NO(H2O)5)SO4 Brown RING pentaaquanitrosyliron(I) sulfate

The ANSWER is EXPLAINED above

EXPLANATION:

Let TAKE the solution of 100 gram

Oxygen =36gram

ACETALDEHYDE = 64gram

noxygen=36/18=2mole=n1

acetaldehyde=64/44=1.5=n2

Mole FRACTION of acetaldehyde= n2/(n1+n2)=0.41

Answer:

According to VBT

HYBRIDIZATION of [coF6] is Sp3d2

shape - OCTAHEDRAL

nature - PARAMAGNETIC in nature.

UNPAIRED electron - 4 unpaired electron.

EXPLANATION:

i don't no BOND ORDER I KNOW

ANSWER:

the SYMBOL of IRON is FE

ATOMIC MASS of SOLID sulphur(s⁸)=256u

molar mass of s⁸=256g

no of molecules in 16g of s⁸=

given mass of s⁸÷molar mass of s⁸×avogadro no.

=16g÷256g×6.022×10²³

=3.76×10²⁰molecules of solid Sulphur

ANSWER:

as we KNOW matter can be in the FORM of SOLID LIQUID or gas ..

Answer:

1)AVG. MOL. Wt.=9g

2)

Explanation:

1) GIVEN

MOLECULAR WEIGHT of oxygen=16g

molecular weight of H2=2g

Answer:

Niels Bohr proposed the Bohr Model of the Atom in 1915. Because the Bohr Model is a modification of the earlier Rutherford Model, some people call Bohr's Model the Rutherford-Bohr Model. The modern model of the atom is based on QUANTUM mechanics. The Bohr Model contains some errors, but it is important because it describes most of the accepted features of atomic theory without all of the high-level math of the modern version. Unlike earlier models, the Bohr Model explains the Rydberg formula for the spectral emission lines of atomic hydrogen.

The Bohr Model is a planetary model in which the negatively-charged electrons orbit a small, positively-charged nucleus similar to the planets orbiting the Sun (except that the orbits are not planar). The gravitational FORCE of the solar system is mathematically akin to the COULOMB (electrical) force between the positively-charged nucleus and the negatively-charged electrons.

Main Points of the Bohr Model

Electrons orbit the nucleus in orbits that have a set size and energy.

The energy of the orbit is related to its size. The lowest energy is found in the smallest orbit.

Radiation is absorbed or emitted when an ELECTRON moves from ONE orbit to another.

Explanation:

Metal oxides are always basic in nature. For EXAMPLE, Magnesium Oxide is a METALLIC oxide. It will be basic because on adding water to it it will BECOME Mg(OH)2 (Magnesium Hydroxide) which is a base!!!!! NON Metallic oxides are always ACIDIC in nature.

ANSWER:

it is QUESTION in biology

Explanation:

AMINO ACID contain in living bodies

Answer:

AMMONIA, methane, and HYDROCHLORIC ACID are MOLECULES having same molecular FORMULA and empirical formula

I THINK ANSWERS C is CORRECT

Explanation:

Heat is very friendly - it likes to move, transfer and travel. It does this by three main mechanisms: CONDUCTION, convection and radiation. Conduction is the transfer of heat through DIRECT CONTACT between different objects or SUBSTANCES.

ANSWER:in CASE of O2 and o 3

Explanation:

Answer:

here us your answer

Explanation:

When alum is ADDED to water it absorbs all its impurities.

hope it helps

please MARK me as brainlist

Explanation:

4 Al + 3 O2 ---------> 2 Al2O3

No. of moles of Al = 5.4÷27

= 0.2 mol

No. of MOLE of O2 = 3.2÷32

= 0.1 mol

3 mol O2 reacts with 4 mol Al

1 mol O2 reacts with 4/3 mol O2

0.1 mol O2 react with 0.133 mol O2

So, O2 is limiting reagent .

So, 0.067 mol O2 is LEFT

So, ( 2/3 × 4/30 ) mol al2o3 is formed

= 4/45 mol al203 is formed.

EXPLANATION:

as PER AVOGADROS NUMBER

1 mole = 6.022*10^23 molecules/atoms

EXPLANATION:

...................

ANSWER:

ratio is 1:1

EXPLANATION:

because both are one MOLE HENCE ratio ALSO 1:1

hii....

In physics and chemistry, ionization energy or IONISATION energy, DENOTED Eᵢ, is the minimum amount of energy required to REMOVE the most loosely bound electron, the VALENCE electron, of an isolated neutral gaseous atom or molecule.

hope it helps u.....

EXPLANATION:

OXIDIZING CHARACTER DECREASES down the GROUP

Answer

When only few elements were discovered,it was to REMEMBER their PROPERTIES and apply them in daily researches and studies. But as the number of elements increased,it became DIFFICULT to remember all of them and use them EFFECTIVELY. Thus,a NEED for proper arrangement arised. This arrangement is known as Periodic Table.

Answer:

ALLOYS are stronger and harder than the constituent metals. ... Alloys have lower melting point than the constituent metals. Alloys have lower ELECTRICAL CONDUCTIVITY than pure metals.

Explanation:

1. Alloys are stronger and harder than the constituent metals.

2. Alloys are more resistant to corrosion.

3. Alloys have lower melting point than the constituent metals.

4. Alloys have lower electrical conductivity than pure metals.

I hope it help you

PLEASE MARK me as brainlist please please please please please✌✌

ANSWER:

HCl is non metal

Explanation:

Because HCl is ONE type of acid and it is harmful and USEFUL for us

ANSWER:

question kya h YE to BATAO

ANSWER:

by charge separation

Explanation:

when charge is ADDED on ATOM then it decides polar or non polar

h2so4 is polar

ANSWER:

carbonate

nitrate

ammonia

ANSWER:

This is the answer...

PLEASE MARK me as a BRAINLEIST . .....