Explore topic-wise InterviewSolutions in Current Affairs.

Answer:

true

Explanation:

Aluminium is used because of its LOW density; PACKAGING (CANS, foil, FRAME etc.). Aluminium is used because it is non-toxic

The noble GASES are the chemical elements in group 18 of the periodic table. They are the most stable due to having the maximum number of valence electrons their outer SHELL can hold. ... This chemical series contains HELIUM, neon, ARGON, krypton, xenon, and radon.

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ANSWER:

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Answer:

GROUP 16 elements.

Explanation:

"Chalcogens" is the another name of OXYGEN family(Group 16)

The MBERS of the group (Oxygen, Sulphur, selenium , Tellurium and Polonium).

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ANSWER:

DILUTE SOLUTION DEPENDS on

D)All

Answer:

M(OH)2.

Explanation:

The FORMULA of all the COMPUNDS formed between HYDROXIDE and alkali EARTH metals is M(OH)2

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SAND -- Iron NAILS -- TOWEL -- PETROL -- Water -- Smoke -- Air

ANSWER:

During STARVATION, the FIRST reserve nutrient to be depleted is GLYCOGEN.

The More the METALLIC nature of an element increases, the REDUCING AGENTS they become.

So, in that sense, as POTASSIUM (K) is the most metallic in nature among the other elements. So, it has the most reducing power.

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ANSWER:

a)

B)

Alkaline-earth METAL, any of the six chemical elements that COMPRISE Group 2 (IIa) of the periodic table.

The elements are beryllium (Be), magnesium (Mg), CALCIUM (Ca), strontium (Sr), barium (Ba), and radium (Ra).

ANSWER:

COMBINATION REACTION is the RIGHT answer MAY be

Answer:

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Answer:

Explanation: In a potentiometric integrating type DVM, the accuracy is usually high. It GENERALLY depends on the reference of the digital to analog converter. Accuracy of the voltage to FREQUENCY converter is less important COMPARED to that of the digital to analog converter.

Answer:

The Alkaline Earth Metals. GROUP 2A (or IIA) of the periodic table are the alkaline earth metals: beryllium (Be), magnesium (Mg), calcium (CA), strontium (Sr), barium (Ba), and radium (RA). They are harder and less reactive than the alkali metals of Group 1A.

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Explanation:

The key process of ELECTROLYSIS is the interchange of ATOMS and ions by the REMOVAL or addition of electrons to the external circuit. Oxidation of ions or neutral molecules OCCURS at the ANODE, and reduction of ions or neutral molecules occurs at the cathode.

ANSWER:

An aqueous solution is a solution in which the solvent is water. An aqueous solution is one in which the solvent is LIQUID water. That is, solute IONS and MOLECULES are surrounded by water molecules and incorporated into the network of bonds within the water. The dissolved species then spread throughout the water.

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Answer:

In the ELECTROLYSIS of WATER the GAS collected at cathode is HYDROGEN and the gas collected at anode is oxygen.

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Answer:

On heating with sodium hydroxide, vegetable oil or ANIMAL fat forms a sodium salt of fatty ACID and glycerol. This PROCESS is known as SAPONIFICATION. vegetable oil or Animal fat + Sodium hydroxide Δ→SaponificationGlycerol + Sodium salt of fatty acid(SOAP)

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ANSWER:

THR answer is GIVEN in the PICTURE.

ANSWER:

B) RADIATION from a point

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Answer:

a faculty by which the body perceives an external STIMULUS; one of the faculties of sight, SMELL, hearing, taste, and TOUCH.

Answer:

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Explanation:

Sodium chloride is a compound formed from the ionic BONDING of sodium and chloride. Sodium chloride is formed when sodium atoms interact with chlorine atoms. Sodium will donate an ELECTRON (which is a negatively-charged PARTICLE) to chlorine. This makes sodium slightly positive and chlorine slightly negative.

The VALUE of BOND ANGLE in WATER molecule is 104.

ANSWER:

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EXPLANATION:

Answer:

When sodium reacts with CHLORINE, it TRANSFERS its one outermost electron to the chlorine atom. ... Due to OPPOSITE charges, sodium ion and chloride ions are held TOGETHER by the electrostatic force of attraction to form sodium chloride, Na+Cl- or NaCl.

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Answer:

EXPLANATION:

Solution :-

Important Point :-

1) As the pH value decreases from 7 to 0 , it represents an INCREASE in H+ ion CONCERNTRATION in the solution and decrease in OH- ion concerntration in the solution.

2)  As the pH value increases from 7 to 14 , it represents and decrease in H+ ion concerntration in the solution and  increase in OH- ion concerntration in the solution.

From these points we can say that :-

1)  If pH of the solution decreases , the concerntration of OH- ion ALSO decreases.

2) If pH of the solution increases, the concerntration of OH- ion also increases.

3) if pH of the solution decreases , the concerntration of the H+ ion increases.

4) if pH of the solution increases , the concerntration of the H+ ion decreases.

Answer:

Glyceryl trinitrate, or GTN, is a TYPE of medicine called a nitrate. It is USED to treat angina (chest pain). It can help STOP chest pain if an angina attack has already started. It can also help to prevent them from starting.

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Hydroxide, any CHEMICAL compound CONTAINING one or more GROUPS, each comprising one atom each of oxygen and hydrogen bonded TOGETHER and functioning as the NEGATIVELY charged ion OH.

ANSWER

Answer:

CHEMICALLY, bleaching powder is known as calcium hypochlorite or calcium oxychloride, with the chemical formula Ca(OCl)2. Bleaching powder is prepared by PASSING chlorine gas (Cl2) over slaked lime (Ca(OH)2). Ca(OH)2+Cl2→Ca(OCl)2+H2O. The industrial PREPARATION of bleaching powder is done through Hansenclever method.

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ANSWER:

the first law of thermodynamics states that CHANGE in internal energy of systems

Explanation:

for closed SYSTEM, in any arbitrary PROCESS of INTEREST

Answer:

As molecules containing unpaired electrons are strongly ATTRACTED by magnetic FIELD, hence oxygen has PARAMAGNETIC NATURE. Unpaired electrons SPIN in the same direction as each other which increases magnetic field effect.

Explanation:

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EXPLANATION:

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Answer:

Both molarity and molality are MEASURES of a CHEMICAL solution's concentration. ... The molality describes the moles of a SOLUTE in relation to the mass of a solvent, while the molarity is concerned with the moles of a solute in relation to the volume of a solution.

ANSWER:

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Answer:

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BUFFER SOLUTIONS CONTAINING AMMONIA and an ammonium salt have been WIDELY used as supporting electrolytes in polarographic ANALYSIS.

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ANSWER:

a form of ENERGY resulting from the existence of charged PARTICLES (such as electrons or PROTONS), either statically as an accumulation of charge or dynamically as a current.

Explanation:

a form of energy resulting from the existence of charged particles (such as electrons or protons), either statically as an accumulation of charge or dynamically as a current.a form of energy resulting from the existence of charged particles (such as electrons or protons), either statically as an accumulation of charge or dynamically as a current.a form of energy resulting from the existence of charged particles (such as electrons or protons), either statically as an accumulation of charge or dynamically as a current.

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Answer:

Here is your Answer

Uses of

a)H2O2(HYDROGEN Peroxide/peroxide) -->

1)Mild antiseptic used on the skin to prevent from infection from minor cuts,SCRAPES,etc.

2)Used as MOUTH rinse

3)Also used as laboratory reagent.

b)LiAlH4 --->

1)Used as strong reducing agent.

2)Used as reagent in preparation of a variety of pharmaceutical,organic chemicals,etc.

c)CaCO3--->

1)It plays an important ROLE in construction, be it as a building material (marble) or as an ingredient in cement.

2)It is used in medicinal industries which manufacture antacids, tablets which are made of base materials etc.

3)It is used as calcium supplements.

4)It is used in the manufacture of paints, paper, plastics, etc.

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ANSWER:

BeCl2 is covalent while Mgcl2 is ionic as Be and Mg BELONGS to same group of valency 2 because magnesium is highly reactive in nature and REACT with chlorine to form ionic or electrostatic bond while BeCl2 I not more reactive to form ionic bond and that's why it share ELECTRON and form covalent bond .

Explanation:

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ANSWER:

OPTION d

EXPLANATION:

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Answer:

Correct option is b)6

Explanation:

In solid sodium chloride, each ion is SURROUNDED by 6 ions of the opposite charge as expected on electrostatic grounds. The surrounding ions are located at the vertices of a regular TETRAHEDRON. In the language of close packing, the larger chloride ions are arranged in a cubic array whereas the smaller sodium ions FILL all the cubic gaps (tetrahedral voids) between them. This same basic structure is found in many other COMPOUNDS and is commonly KNOWN as the halite or rock salt crystal structure. It can be represented as face centered cubic (FCC) lattice with a two atom basis or as two interpenetrating face centered cubic lattice. The first atom is located at each lattice point, and the second atom is located halfway between lattice points along the FCC uni cell edge.

Answer:

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Explanation:

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ANSWER:

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ANSWER:

the CORRECT IUPAC NAME is PROPANE

ANSWER:

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Answer:

Let us calculate the average NUMBER of weights REQUIRED to make up a particular SUM in both the cases. This average comes out to be 2.1 in the 5:2:2:1 case and, wait for it, 2.0 in the 4:3:2:1 case. ... We can, THOUGH, afford to have the 4-unit weight as a combination of (2+2). Math is FUN.