Explore topic-wise InterviewSolutions in Current Affairs.

EXPLANATION:

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MERCURY(II) oxide is a red SOLID. When it is heated to a temperature above 500°C, it easily decomposes into mercury and OXYGEN gas. The red color of the mercury oxide REACTANT BECOMES the silver color of mercury. The color change is the sign that the reaction is occurring.

ANSWER:

Answer is DIMETHYL PENTANE

ANSWER:

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ANSWER:

एल्काइन एक असंतृप्त हाइड्रोकार्बन होता है। इसमें दो कार्बन परमाणु के बीच एक त्रि-बन्ध पाया जाता है।

Answer:

They have the same PROPERTIES as NATURAL diamonds, the only difference is that they are grown in a lab, whereas natural diamonds are FORMED in the earth. Synthetic diamonds are alternatives to natural and lab grown diamonds. Common ONES can INCLUDE spinel, and cubic zirconia.

Explanation:

बेंज़ीन या धूपेन्य एक हाइड्रोकार्बन है जिसका अणुसूत्र C6H6 है। बेंजीन का अणु ६ कार्बन परमाणुओं से बना होता है जो एक छल्ले की तरह जुड़े होते हैं तथा प्रत्येक कार्बन परमाणु से एक हाइड्रोजन परमाणु जुड़ा होता है।

Ammonium chloride is ASSAYED by indirect assay method. The sample is dissolved in water and treated with previously neutralised FORMALDEHYDE SOLUTION. (Methyleneimine is formed which polymerises to form Hexamine). This RESULTS in the quantitative LIBERATION of HCl equivalent to NH4Cl.

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Explanation:

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ANSWER:

what is your QUESTION DEAR..

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ACETOPHENONE can be obtained by the reaction of phenyl magnesium BROMIDE (PHMGBR - a Grignard reagent) and either (A) Ethane nitrile or (B) Ethanamide.

On the other hand, the reaction of PhMgBr with ETHANOYL chloride will give a tertiary alcohol and the reaction of PhMgBr with Methanamide will give benzaldehyde.

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Answer:

1. pure SUBSTANCE consists only of one element or one compound. a MIXTURE consists of two or more different SUBSTANCES, not CHEMICALLY joined together.

ANSWER:

BRO what's the question

Explanation:

ANSWER:

did the two similar PRODUCTS you might want me bhi nh Karna boli NA na

Explanation:

how do we need to me Karu you have a LETTER from you JAAN to the

Ammonium chloride is ASSAYED by indirect assay METHOD. The sample is dissolved in water and treated with previously neutralised formaldehyde SOLUTION. (Methyleneimine is formed which polymerises to FORM Hexamine). This results in the quantitative liberation of HCl equivalent to NH4Cl.

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Explanation: Sorry I am not so good at ENGLISH spelling but this is not Jieun it's Jieun's mom Mi Jin

ANSWER:

the answer is TOUGHNESS

ANSWER:

(a) AREA

Conductance (SIEMENS, S) is directly proportional to the area of the vessel and the CONCENTRATION of.

Answer:

i c . ii B. III d .iv c . V c. HOPE it helpful .

ANSWER:

The first law of thermodynamics, also known as Law of Conservation of ENERGY, STATES that energy can neither be created nor destroyed; energy can only be transferred or changed from ONE FORM to another.

Explanation:

Answer:

An aerosol (abbreviation of "aero-solution") is a suspension of fine solid particles or liquid droplets in air or another gas.[1] Aerosols can be natural or anthropogenic. Examples of natural aerosols are fog, mist, dust, forest exudates and geyser steam. Examples of anthropogenic aerosols are particulate air POLLUTANTS and smoke.[1] The liquid or solid particles have diameters typically less than 1 μm; larger particles with a significant settling SPEED make the mixture a suspension, but the distinction is not clear-cut. In general conversation, aerosol usually refers to an aerosol spray that delivers a consumer product from a can or SIMILAR container. Other TECHNOLOGICAL applications of aerosols include dispersal of pesticides, medical treatment of respiratory illnesses, and combustion technology.[2] Diseases can also spread by means of small droplets in the breath, also CALLED aerosols (or sometimes bioaerosols).[3]

Answer:

None

Explanation:

Select from FOLLOWING, which is not MECHANISM of SIZE REDUCTION *

Cutting

Compression

Impact

None

Synthetic fiber or synthetic fibre are fibers made by humans through chemical synthesis, as opposed to natural fibers that are DIRECTLY derived from living organisms. They are the RESULT of EXTENSIVE research by SCIENTISTS to improve upon NATURALLY occurring animal and plant fibers.

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ANSWER:

Both are TYPES of MIXTURES.

ANSWER:

there are SIX groups.

Explanation:

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Explanation:

Brownian motion, also CALLED Brownian MOVEMENT, any of various physical PHENOMENA in which some quantity is constantly undergoing small, RANDOM fluctuations. It was named for the Scottish BOTANIST Robert Brown, the first to study such fluctuations (1827

Answer:

In addition to its USE as a precious gem, CORUNDUM finds some use as an abrasive, owing to the extreme hardness of the MATERIAL (9 on the Mohs hardness scale). It is used for grinding optical glass and for polishing METALS and has also been made into sandpapers and grinding wheels.

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iii MERCURY and bromine are LIQUIDS at room TEMPERATURE. iv In any period atomic radius of alkali metal is the highest. Assertion: Of the elements , helium has the highest value of first ionisation enthalpy. Reason : Helium has the most positive electron gain enthalpy of all the elements.

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Answer:

i) The reactant is H2O2(Hydrogen peroxide) and the catalyst is MnO2 (Manganese(IV) oxide ).

ii) Manganese dioxide catalyzes the decomposition of hydrogen peroxide into oxygen and water.

iii) Oxygen is collected by the downward displacement of water because it is only slightly SOLUBLE in water and is less dense than water. It cannot be collected by downward displacement of AIR since oxygen is slightly HEAVIER than air and also it will get MIXED with other gases in the air.

iv) H2O2(Hydrogen peroxide) is preferred for lab preparation of oxygen because of the following reasons.  

• No heating is required.
• The rate of evolution of oxygen (O2) is MODERATE and under control.
• H2O2 is a safe chemical.

Assuming that all of the AlCl3 dissociates completely in water.

molar mass of AlCl3= 27+ 3* 35.5 => 133.5 grams per mole.

As, 267 grams of AlCl3 is DISSOLVED in water, 267/133.5 => 2 moles of AlCl3.

The equation for dissociation is: AlCl3---------> Al+3  +  3Cl-1

So, 1 part of AlCl3 gives 1 part of AL3+ ions and 3 parts of Cl-1 ions.

So, 1 part=2 moles.

Hence, 2 moles of Al3+ and 3 X 2=> 6 moles of Cl-1 are formed.

1 mole = 6.023 X 10^23 ions.

So, 2 X 6.023 X 10^23=> 12.046 X 10^23 Al3+ ions are formed.

So, 6 X 6.023 X 10^23=> 36.138 X 10^23 Cl-1 ions are formed.

i didn't UNDERSTAND the QUESTION

EXPLANATION:

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ANSWER:

The volume occupied by the 1mole of N

2

=22.4l

So, the 1mole=6.022×10

23

molecules of N

2

=

6.022×10

23

22.4

So, 6.022×10

22

molecules of N

2

would occupy volume

=

6.022×10

23

l

22.4

×6.022×10

22

=2.24l

Thus ,the RIGHT option is B

ANSWER:

K ( POTASSIUM ) is the CORRECT answer for your QUESTION

EXAMPLES of ALLOTROPES INCLUDE:

• Non-metals.
• Metalloids.
• .Metals.

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Answer:

first wastewater is filter

then it is left to store in BIG TANK to to occur the process of sedimentation

after the impurities are sedimented down then the water is SEND to again for filtration

after that water is chlorinated

Answer:

valence shel and ELECTRONIC configuration will be the answer

Explanation:

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ANSWER:

increase

Explanation:

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Answer:

1 TRUE

2 false

3 true

4 false

5 true ❤️

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Answer:

2-sulphur

3-co2

4-moisture and TEMPERATURE

5-white

ANSWER:

The following DATA represents the distribution of electrons, protons

and neutrons in atoms of four elements A,B,C,D. (3)

Solve the following questions:

i) Write the electronic distribution of atoms of element A and D

ii) Element A is an INERT gas, why?

iii) What is the valency of element C?

29. Describe the role played by the lysosomes. Why these are termed as SUICIDAL

bags? How do they perform their function?

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Answer:

Why is DISTILLED WATER USED in the batteries and not the TAP water?

Answer:

• polarity of the molecules

Explanation:

By USING Pauling's electronegativity values for elements, the polarity of molecules is PREDICTED. If electronegativity difference is HIGH, molecule is highly polar and it the electronegativities of two elements are similar or almost similar, the bond formed between them is non-polar.

Answer:

It is called atomic radius

EXPLANATION:

The atomic radius is DEFINED as distance between nucleus and the OUTERMOST ORBIT of atom.

ANSWER:

OPTION 2 is correct

Explanation:

more +ve charge on less will be its radii.more NEGATIVE charge over the atom more will be its radii

Answer:

NON METALLIC elements are LESS in NUMBER than metallic elements

Answer:

Reactivity Aldehydes are generally more reactive than KETONES in nucleophilic ADDITION reactions DUE to steric and electronic reasons. Sterically, the presence of two relatively large substituents in ketones HINDERS the approach of nucleophile to carbonyl carbon than in aldehydes having only ONE such substituent.

Explanation:

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ANSWER:

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about 0.1 NANOMETERS...

Answer:

Alpha particles (a) are composite particles consisting of two protons and two neutrons tightly bound TOGETHER (Figure 1). They are EMITTED from the nucleus of some radionuclides during a form of radioactive decay, called alpha-decay. An alpha-particle is identical to the nucleus of a NORMAL (atomic mass four) HELIUM atom i.e. a DOUBLY ionised helium atom.