Explore topic-wise InterviewSolutions in Current Affairs.

Answer:

because barium has a VALENCY of 2 by criss CROSS method we GET iodine number 2

Answer:

evaporation is a SLOW PROCESS because it is a NATURAL process whereas boiling TAKES some amount of ENERGY so it is faster than evaporation process

Answer:

ELECTRON orbiting around the nucleus will be travelling in their particular spherical parts known as shell (ORBITS)

Explanation:

but as per Quantum numbers electrons are oriented in ORBITALS

YES they ALSO CONDUCT Electric

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ANSWER:

GAS< liquid

Explanation:

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Answer:

How to calculate the NUMBER of g-atoms of SULPHUR (S) in an 8 gram sample - Quora. 1 Gram atom means one mole of the substance. 1 gram atom of sulphur weighs 32grams. HENCE 8grams of sulphur CONTAINS 0.25gram atoms of sulphur.

ANSWER:

ITNA TOH PTA hona CHAHIYE

ANSWER:

( AQ ) AQUEOUS SOLUTION

ANSWER:

I have a great

Explanation:

I don't KNOW that

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Answer:

when STEAM changes to water it is STILL aform of water that is why nonew substance is formed and it is a physical change

when food is cooked due to HEAT and the ingredients we aad to it the CHEMICAL state of the food changes that is why it is chemical change

Answer:

Chemistry is sometimes CALLED “the CENTRAL science,” because it bridges PHYSICS with other natural sciences, such as geology and BIOLOGY.

Answer:

In condensed matter physics and materials SCIENCE, an amorphous (from the Greek a, without, morphé, shape, form) or non-crystalline solid is a solid that lacks the long-range order that is characteristic of a crystal. In some older books, the term has been used SYNONYMOUSLY with glass. Nowadays, "glassy solid" or "amorphous solid" is considered to be the overarching concept, and glass the more special case: Glass is an amorphous solid that exhibits a glass transition.[1] Polymers are often amorphous. Other types of amorphous solids include gels, THIN films, and nanostructured materials such as glass.

I think it helps you

Thank you

ANSWER:

Explanation:

1. There are only just over 100 TYPES of atoms, but there are millions and millions of different types of substances out there. This is because they are all made up of different types of molecules. Molecules are not only made up of different types of atoms but also different ratios.

2.  Because water ( ) exist as a molecule consisting of hydrogen and oxygen.

    while gold or iron only consist of pure metals  (  i.e. only one element)        respectively

3. The properties of compounds are OFTEN very different from the properties of the elements that make them.

For example, water is made from two atoms of hydrogen bonded to one atom of oxygen. ... Sugar is a compound composed of atoms of carbon, hydrogen, and oxygen.

ANSWER:

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Answer:

YES definetely they have different compositions of salt and other thing in it because SEA is a COMBINE FORM of many RIVERS and have features of river falling and where the sea is but river is very particular in the composition

Answer:

0000000000000000000000000000000000000000000000000000hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1

Explanation:it is EXCITING

Explanation:

3,2,1,4 this is your ANSWER

Answer:

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EXPLANATION:

vodka is it OK for me I don't want me too R

ANSWER:

he STAIRS and then we can GO BACK and I don't KNOW

MG , Al , ZN , FE , Cu .

EXPLANATION:

दिए हुए निम्नलिखित धातुओं  अपनी क्रियाशीलता के अनुसार  वे एक दूसरे को उनके लवणों के विलयनों में से प्रतिस्थापित करती हैं | चुकी यहा सबसे अधिक क्रियाशील Mg है  , इसलिए ये सबसे पहले लवणों के विलयनों में से प्रतिस्थापित होता हैं | अर्थात सबसे कम क्रियाशील Cu है , इसलिए दिए हुए निम्नलिखित धातुओं मे सबसे अंत मे Cu का उसके  लवणों के विलयनों में से प्रतिस्थापित होता  हैं।

अतः निम्नलिखित धातुओं का क्रम जिसमें वे एक दूसरे को उनके लवणों के विलयनों में से प्रतिस्थापित करती हैं ;

                         Mg , Al , Zn , Fe , Cu

Answer:

5 litre of 0.4 m H2SO4 contains

1)no. of MOLE = 2 mood

2)MASS of h2so4=196 g

Answer:

Explanation:

REDUCTION of CU if TAKEN molten CUSO4

Answer:

here are your notes

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Physical and chemical changes

Chemical change – one or more new substances with new physical and chemical properties are formed.

Chemical Reactions and Equations-1

Here, when copper sulphate REACTS with iron, two new substances, i.e., ferrous sulphate and copper are formed.

Chemical-Reactions-and-Equations-2

Physical change – change in colour or state occurs but no new substance is formed.

Example: Water changes to steam on boiling but no new substance is formed(Even though steam and water look different when they are made to react with a piece of Na, they react the same way and give the exact same products). This involves only a change in state (liquid to vapour).

Observations that help determine a chemical reaction

A chemical reaction can be determined with the help of any of the following observations:

a) Evolution of a gas

b) Change in temperature

c) Formation of a precipitate

d) Change in colour

e) Change of state

Chemical reaction

Chemical reactions are chemical changes in which reactants transform into products by making or breaking of bonds(or both) between different atoms.

Types of chemical reactions

Taking into consideration different factors, chemical reactions are grouped into multiple categories.

Few examples are:

● Combination

● Decomposition

● Single Displacement

● Double displacement

● Redox

● Endothermic

● Exothermic

● Precipitation

● Neutralisation

Chemical Reactions and Equations I

Word equation

A  word equation is a chemical reaction expressed in words rather than chemical formulas. It helps identify the reactants and products in a chemical reaction.

For example,

Sodium + Chlorine → Sodium chloride

The above equation means: “Sodium reacts with chlorine to form sodium chloride.”

Symbols of elements and their valencies

A symbol is the chemical code for an element. Each element has one or two-letter atomic symbol, which is the abbreviated form of its name.

Valency is the combining CAPACITY of an element. It can be considered as the NUMBER of electrons lost, gain or shared by an atom when it combines with another atom to form a molecule.

Writing chemical equations

Representation of a chemical reaction in terms of symbols and chemical formulae of the reactants and products is known as a chemical equation.

Chemical Reactions and Equations-3

• For solids, the symbol is “(s)”.

• For liquids, it is “(l)”.

• For gases, it is “(g)”.

• For aqueous solutions, it is “(aq)”.

• For gas produced in the reaction, it is represented by “(↑)”.

• For precipitate formed in the reaction, it is represented by “(↓)”.

Balancing of a Chemical Reaction

Conservation of mass

According to the LAW of conservation of mass, no atoms can be created or destroyed in a chemical reaction, so the number of atoms for each element in the reactants side has to balance the number of atoms that are present in the products side.

In other words, the total mass of the products formed in a chemical reaction is equal to the total mass of the reactants participated in a chemical reaction.

Balanced chemical equation

The chemical equation in which the number of atoms of each element in the reactants side is equal to that of the products side is called a balanced chemical equation.

Steps for balancing chemical equations

Hit and trial method: While balancing the equation, change the coefficients (the numbers in front of the compound or molecule) so that the number of atoms of each element is same on each side of the chemical equation.

Short-cut technique for balancing a chemical equation

Example:

aCaCO3+bH3PO4→cCa3(PO4)2+dH2CO3

Set up a series of SIMULTANEOUS equations, one for each element.

Ca: a=3c

C: a=d

O: 3a+4b=8c+3d

H: 3b=2d

P: b=2c

Let’s set c=1

Then a=3 and

d=a=3

b=2c=2

So a=3; b=2; c=1; d=3

The balanced equation is

3CaCO3+2H3PO4→Ca3 (PO4)2+3H2CO3

Answer:

copper is a red METAL.

So copper on heating, is converted to BLACKISH copper (II) Oxide.

when it is heated in the PRESENCE of HYDROGEN gas....

it returns back to copper and water.

so

a) x is Copper

y is Copper (II) Oxide

b) Cu + O2 --> CuO

CuO + H2 --> Cu + H2O

c) Oxidation and Reduction

ANSWER:

they have mass

and they OCCUPY space

EXPLANATION:

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ANSWER:

n I LOVE you so BAD for you GUYS are the only thing is I was going through the night h you have to help me out of the African

Answer:

fd SH hai f GAI hongi in the parents on tter his own a great DAY ahead to be a single is not a single family active in the parents of lock by a great day ahead in the child-Twinkle is

Explanation:

fd a bacteria cell is a single your name and I will not be happy new class new to

Answer:

he was like I don't know what I WANT a good DAY at work and I OT for the first thing in the WORLD are making HISTORY of the African American hustle life is a quadratic

EXPLANATION:

I don't know the LANGUAGE what you are speaking if you speak in ENGLISH I can TRY to answer this question ..........

Answer:

The conductivity of a solution is DIRECTLY PROPORTIONAL to number of ions present in a unit VOLUME of the solution because current is CARRIED FORWARD by the ions. With dilution number of ions in unit volume decreases so that conductivity also decreases. Hence with dilution conductivity decreases.

Explanation:

ANSWER:

उन धातुओं की एक सूची बनाइए जिनका वैद्युतअपघटनी निष्कर्षण होता है।

Explanation:

it very TUF answer

ANSWER:

hiii

buddy here is the answer to your QUESTION

EXPLANATION:

கீழ்கண்டவற்றுல் தவறான கூற்று எது

(அ)ஒரு கிராம் சி மைனஸ் c-12 ன் அவகாட்ரோ எண்ணிக்கையிலான அணுக்களை கொண்டது.

(ஆ)ஒரு மோர் ஆக்ஸிஜன் வாயு அகற்றும் எண்ணிக்கையிலான மூலக்கூறுகளைக் கொண்டது.

(இ)ஒரு மேல் ஹைட்ரஜன் வாயு உனது அவகாட்ரோ எண்ணிக்கையிலான அணுக்கலை கொண்டது.

(ஈ) ஒரு மேல் எலக்ட்ரான் என்பது 6.023 × 1023 எலக்ட்ரான்களை குறிக்கிறதுகீழ்கண்டவற்றுல் தவறான கூற்று எது

(அ)ஒரு கிராம் சி மைனஸ் c-12 ன் அவகாட்ரோ எண்ணிக்கையிலான அணுக்களை கொண்டது.

(ஆ)ஒரு மோர் ஆக்ஸிஜன் வாயு அகற்றும் எண்ணிக்கையிலான மூலக்கூறுகளைக் கொண்டது.

(இ)ஒரு மேல் ஹைட்ரஜன் வாயு உனது அவகாட்ரோ எண்ணிக்கையிலான அணுக்கலை கொண்டது.

(ஈ) ஒரு மேல் எலக்ட்ரான் என்பது 6.023 × 1023 எலக்ட்ரான்களை குறிக்கிறது

ANSWER:

no. of MOLES LEFT = 2×10^-3

Explanation:

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ANSWER:

sericulture is the process of rearing silk worm for obtaining silk. reeling is the process of UNWINDING the THREAD of silk from the cocoon.

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EXPLANATION:

this CONTAIN 1 QUATERNARY CARBON

ANSWER:

Due to conversion of FE to Fe+2 and then to Fe+3 this process is called RUSTING of iron

Explanation:

ANSWER:

they are USED in UTENSILS

Answer:

The CONDUCTIVITY of a solution is DIRECTLY proportional to NUMBER of ions present in a unit VOLUME of the solution because CURRENT is carried forward by the ions. With dilution number of ions in unit volume decreases so that conductivity also decreases. Hence with dilution conductivity decreases.

Explanation:

Answer:

The conductivity of a solution is directly PROPORTIONAL to number of IONS present in a unit volume of the solution because current is carried forward by the ions. With dilution number BASES so that conductivity also decreases. Hence with dilution conductivity decreases.

Explanation:

Answer:

The CONDUCTIVITY of a solution is DIRECTLY proportional to number of ions present in a unit volume of the solution because current is carried forward by the ions. With dilution number of ions in unit volume DECREASES so that conductivity also decreases. HENCE with dilution conductivity decreases.

Explanation:

Answer:

The conductivity of a SOLUTION is directly proportional to number of IONS present in a UNIT volume of the solution because current is CARRIED FORWARD by the ions. With dilution number of ions in unit volume decreases so that conductivity also decreases. Hence with dilution conductivity decreases.

Explanation:

ANSWER:

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Answer:

BUSY day tomorrow so I'll have a GOOD GIRL is he going on and off the phone he said that he was KRISNA to get a CHANCE

Explanation:

hjrj

अभिक्रिया होती है। दिया गया है [TEX] (C

Answer:

The PRODUCTS obtained in chlor - alkali process are SODIUM HYDROXIDE, chlorine gas, and hydrogen gas. # the gas LIBERATED at ANODE is chlorine and gas liberated at cathode is hydrogen.

Explanation:

Answer:

4:1

The ratio of σ and π bonds in benzene is 4:1. Benzene has molecular formula C6H6 so there is the PRESENCE of one double bond in between ALTERNATE carbon ATOMS and each carbon is attached to TWO carbon atoms by means of a single bond and a double bond and a hydrogen atom by a single bond.

Explanation:

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Answer:

Right into the crust of the fry, Hartings said. That turns the crispy crust that came out of the fryer into a soggy mess. Temperature ALSO PARTIALLY explains why the taste of FRIES changes as they cool down, Hartings said. Simply put, heat can heighten the flavors in foods, he said.

The bond angle between TWO bond pairs is 180 degrees and SHOW linear geometry

The bond angle between 4 bond pairs is is 109.5

I HOPE this helps

Answer:

DUE to ALMOST equal density milk easily dissolve in water at room TEMPERATURE whereas HONEY's density is more than water so it doesn't dissolve easily in water at room temperature