52639 + Interview Questions in Secondary School in Chemistry

1.	What are isoelectronic?
Answer» having the same numbers of ELECTRONS or the same electronic structure."CARBON MONOXIDE is isoelectronic with nitrogen" PLEASE be my friend please mark as brainliest and please saythanks

Discussion

2.	Definition of law of conservation of mass
Answer» Antoine Lavoisier STATED that "The LAW of conservation of mass meansthat the ATOMS of an object cannot be CREATED or destroyed, but can be moved around and be changed into different PARTICLES." Please be my friend please mark as brainliest and please saythanks

Discussion

3.	Extraction of metals of low reactivity silver
Answer» SILVER is extracted by MacArthur FORREST CYANIDE PROCESS

Discussion

4.	Butanone is a four-carbon compound with functional group?
Answer» Butanone has KETONE FUNCTIONAL GROUP.

Discussion

5.	Ethanoic acid is commonly called a
Answer» *Ethanoic acid is commonly known as ACETIC acid.It's CHEMICAL FORMULA is CH3COOH.*

Discussion

6.	What is silicons and explain the bhor,s model of atomic theory?
Answer» *Silicons are the Semi metals or so CALLED Metalloids..* Bhor's Atomic Therory > the electrons move in orbits of fixed size and energy >energy of an ELECTRON depends on the size of the orbit and is lower for smaller orbits > atom will be completely stable in the STATE with the smallest orbit, since there is no orbit of lower energy into which the electron can JUMP

Discussion

7.	Who proposed atomic theory?
Answer» JOHN DALTON PROPOSED ATOMIC THEORY.

7.

Who proposed atomic theory?

Answer»

JOHN DALTON PROPOSED ATOMIC THEORY.

Discussion

8.	Why NaHCO3 is added in preparation of soap?
Answer» make the soap hard is the right ANSWER. Becausesodium BICARBONATE doesn't help to INCREASE the ph of the soap. Soap is analkali. It made by NAOH and some Oils.

Discussion

9.	Who discovered chemistry?
Answer» Antoine laurent lavoisier Please be my FRIEND please SAY THANKS and please MARK asbrainliest

9.

Who discovered chemistry?

Answer»

Antoine laurent lavoisier

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Discussion

10.	I want an easy explaination of CHARLES and BOYLES law
Answer» Charles' law and Boyle's law are both examples of "empirical gas laws." What this MEANS is that they wre originally discovered by doing careful measurements of a gas' PRESSURE P, temperature T and volume V. By holding the temperature of the gas fixed and varying its volume, Boyle observed that the larger the volume got, the lower the pressure of the gas became. This inverse RELATIONS ship, P = K/V, is Boyle's law. Similarly, by holding P fixed and varying V, Charles found that the larger the volume got, the higher the temperature became: this direct relationship, V = bT, is Charles' law. in creasing the volume decreases the number of collisions of gas molecules with the walls per unit time, which decreases the pressure. Charles' law is harder. By INCREASING T we increase the average energy of all the molecules.

Discussion

11.	What is the S.T.P(standard temperature and pressure )
Answer» STP in chemistry is the abbreviation for Standard Temperature and Pressure. STP most commonly is used when performing calculations on gases, such as gas density. The standard temperature is 273 K (0° Celsius) and the standard pressure is 1 ATM pressure. At STP, ONE mole of gas occupies 22.4 L of volume (MOLAR volume).

Discussion

12.	What are the earth metals that are titrated using non aqueous titration?
Answer» Earth metals is a term used to describe 17 chemical elements in the periodic table of the elements: scandium, yttrium, and the 15 lanthanides. The so-called rare earth elements are used in many technological devices. Here's the full LIST of the rare earth metals, preceded by their symbols: La lanthanum, Tb terbium, Ce CERIUM, Dy dysprosium, Pr praseodymium, Ho holmium, Nd neodymium, Er ERBIUM, Pm promethium, Tm thulium, Sc scandium, Sm samarium, Yb ytterbium, Eu europium, Lu lutetium, Gd gadolinium, and Y yttrium. Certain of the rare earths are used to manufacture high performance permanent MAGNETS used in electric motors and generators. Hence, they are considered essential for some businesses like wind turbines.

Discussion

13.	A chemical reaction in which oxygen is used but carbon dioxide is not produced.
Answer» A chemical REACTION between dioxides of non-,ETAL and metal with OXYGEN except CO₂. Example: SO₂+O₂⇒SO₃

Discussion

14.	The most abundant rare gas in the atmosphere is
Answer» the noble gases =helium , NEON ,argon , krypton , XENON ,RADON

Discussion

15.	The names of the scientists, Newlands, Mendeleev, and Meyer are associated with the development of
Answer» PERIODIC table of CONTENTS

Discussion

16.	The metal that is usually extracted from sea water is
Answer» The metal that is USUALLY EXTRACTED from sea WATER is MG (MAGNESIUM)

Discussion

17.	The most important ore of aluminium is
Answer» The most IMPORTANT ORE of ALUMINIUM is BAUXITE

Discussion

18.	The ionisation energy of hydrogen atom in the ground state is x KJ. The energy required for an electron to jump from 2nd orbit to 3rd orbit is
Answer» The ionisation energy of hydrogen atom in the GROUND state is X KJ. The energy required for an electron to jump from 2ND ORBIT to 3rd orbit is *5x/36*

Discussion

19.	The most commonly used bleaching agent is
Answer» CHLORINE is the most COMMONLY USED BLEACHING AGENT .

Discussion

20.	Information about extraction of metals of low reactivity silver, platinum and gold
Answer» Extraction Of silver : 1.Silver can be EXTRACTED from Ag2S by using DISPLACEMENT from aqueous solution. 2.Ag2S is dissolved in KCN solution to GET dicyanoargentate (I) ions. From these ions silver is obatined in the form of Precipitate by treating it with Zinc dust. CHEMICAL EQUATION: Ag2S +4CN⁻---->2[Ag(CN2]⁻ + S²⁻ 2[Ag(CN2]⁻ +Zn(s) -----> [Zn(CN)4²⁻ +2Ag(s) Extraction of Gold: Gold is extracted from the ore called as Electrum by treating the ore with weak cynaide solution. Zinc is added and gold separates from the ore. Extraction of platinum: Extraction of platinum INVOLVES froth flotation and smelting

Discussion

21.	The nucleus of a hydrogen atom consists of
Answer» The NUCLEUS of a HYDROGEN ATOM consists of ONE PROTON only.

Discussion

22.	The maximum number of covalent formed by nitrogen is
Answer» The maximum NUMBER of COVALENT formed by NITROGEN is four.

Discussion

23.	The material which can be deformed permanently by heat and pressure is called a
Answer» The MATERIAL which can be deformed PERMANENTLY by heat and PRESSURE is called a thermoset

Discussion

24.	The metal that is used as a catalyst in the hydrogenation of oils is
Answer» The METAL that is used as a catalyst in the hydrogenation of OILS is NI

Discussion

25.	The mass of P4O10 that will be obtained from the reaction of 1.33 gram of P4 and 5.07 of oxygen is
Answer» ACCORDING to LAW of conservation of MASS, the mass should be EQUAL, before and after reaction. the mass obtained = 1.33+5.07 =6.40 GRAMS

Discussion

26.	The gas present in the stratosphere which filters out some of the sun's ultraviolet light and provides an effective shield against radiation damage to living things is
Answer» The GAS PRESENT in the STRATOSPHERE which filters out some of the sun ULTRAVIOLET light and PROVIDE an effective shields against radiation damage to living things is *ozone layer.*

Discussion

27.	The hardest form of carbon is
Answer» The HARDEST CARBON is DIAMOND

Discussion

28.	The number of waves in n x 10th Bohr's orbit are
Answer» The number of waves in N X 10TH Bohr's orbit are .......n

Discussion

29.	The human body is made up of several chemical elements; the element present in the highest proportion (65%) in the body is
Answer» the ELEMENT present in the HIGHEST PROPORTION (65%) in the BODY is OXYGEN

Discussion

30.	The molecular formula of phosphorous is
Answer» MOLECULAR FORMULA of PHOSPHORUS is P4

Discussion

31.	When soap is prepared by cold process, a small amount of sodium carbonate is added to:a)make the soap hardb)increase the pHgive explaination for choosing ur answer
Answer» Make the SOAP hard is the RIGHT answer. Because sodium CARBONATE doesn't help to increase the PH of the soap. Soap is an alkali. It made by NAOH and some Oils.

Discussion

32.	The gas used in the manufacture of vanaspati from vegetable oil is
Answer» Hydrogen PLEASE be my FRIEND and please SAY THANKS and please MARK asbrainliest

32.

The gas used in the manufacture of vanaspati from vegetable oil is

Answer»

Hydrogen

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Discussion

33.	An old man and a scientist were talking about a deserted house. The old man was sure that it was haunted by ghosts, but the scientist discarded the view saying no one had ever seen a ghost. The old man was annoyed and chalenged the scientist about existence of atoms, sub-atomic particles which also could not be seen.· Name the three sub-atomic particles and their discoverers. · Whose viewpoint do you support and why?
Answer» Neutron,proton and electron james chadwick,ernest rutherford and j j thomson of scientist In the modern era today, everything has undergone tremendous change and improvement. HUMAN beings live fast-paced LIVES and have BECOME undeniably materialistic. GREAT scientific discoveries such as human cloning and test-tube babies prove the advanced human intelligence of today. High rises are numerous and systems are computerized for the convenience of all. All these are the results of the usage of advanced technology. dont believe in old sayings becoz i think science has every answer to ur question Please be my friend and please say thanks and please mark asbrainliest

33.

An old man and a scientist were talking about a deserted house. The old man was sure that it was haunted by ghosts, but the scientist discarded the view saying no one had ever seen a ghost. The old man was annoyed and chalenged the scientist about existence of atoms, sub-atomic particles which also could not be seen.· Name the three sub-atomic particles and their discoverers. · Whose viewpoint do you support and why?

Answer»

Neutron,proton and electron
james chadwick,ernest rutherford and j j thomson
of scientist
In the modern era today, everything has undergone tremendous change and improvement. HUMAN beings live fast-paced LIVES and have BECOME undeniably materialistic. GREAT scientific discoveries such as human cloning and test-tube babies prove the advanced human intelligence of today. High rises are numerous and systems are computerized for the convenience of all. All these are the results of the usage of advanced technology. dont believe in old sayings becoz i think science has every answer to ur question

Please be my friend and please say thanks and please mark asbrainliest

Discussion

34.	The National Chemical Laboratory is situated in
Answer» PUNE in WESTERN india PLEASE be my friend and please say THANKS and please mark asbrainliest

Discussion

35.	The gas used for artificial ripening of green fruit is
Answer» Ethylene PLEASE be my FRIEND and please SAY THANKS and please MARK asbrainliest

35.

The gas used for artificial ripening of green fruit is

Answer»

Ethylene

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Discussion

36.	The oil used in the froth floatation process is
Answer» The OIL used in the FROTH FLOTATION process is pine oil.

Discussion

37.	Who discoverd the lead
Answer» Lead is a relatively common element, easily FOUND and MINED in the earth and for this reason, it is IMPOSSIBLE to say who first discovered lead because it was used in MANY different COUNTRIES during the middle ages.

Discussion

38.	Equal masses of oxygen, hydrogen and methane are kept under identical conditions. The ratio of the volumes of gases will be
Answer» To make it concrete, ASSUME you have 32 grams of each GAS 32.0 g O2 x (1 mol O2 / 32.0g O2) = 1 mol 32.0 g H2 x (1 mol H2 / 2.0g H2) = 16 mol 32.0 g CH4 x (1 mol CH4 / 16.0g CH4) = 2 mol CH4

Discussion

39.	The nuclear particles which are assumed to hold the nucleons together are
Answer» The RIGHT ANSWER is MESONS

Discussion

40.	The Latin word formica means ant. The name formic acid is derived from this Latin word because
Answer» The Latin word formica means ANT. The name formic acid is derived from this Latin word because this acid was first obtained by the DISTILLATION of ants.

Discussion

41.	Plzzzz frnds help me answer these questions. i have to submit by tomorrow itself. plzzzzz do help.Q 1) A metal which reacts violently and vigorously with cold water ?Q 2) A metal which does not displace hydrogen from water or steam?Q 3) A monovalent metal which reacts explosively with dilute sulphuric acid.Q 4) A metal which neither reactys with dilute sulphuric acid nor burns in air forming an oxide Q 5) A metal which forms a basic oxide on reaction with oxygen and one which forms and amphoteric oxideQ 6) A metal which has low or negligible tensile strength and is a liquid at a room temperature?Q 7) A metal which has no lustre floats on water and is so soft that it can be cut with a knife?Q 8) A metal which is neither sonorous nor ductile at any temperature?Q 9) A metal which is a good conductor of heat and electricity and is solid at room temperature,
Answer» 1. Potassium 2.Copper SILVER gold 3.Cu hg 4.Ag pt 5.Metal Oxides 6.Bromine 7.Sodium and Potassium 8.Iodine 9.Copper and Silver

Discussion

42.	Calculate de broglie's wawelength for an electron travelling at one % the speed of lightcalculate frequency of a radiation whose wawelength is 4000 angstroms
Answer» De BROGLIE's Wave length λ = H / P, where p = the momentum of the electron λ = 6.626 * 10⁻³⁴ J . s / (9.109 * 10⁻³¹ kg * 3 * 10⁶ m/s) = 2.425 * 10⁻⁹ meters ============== frequency = speed of light / WAVELENGTH = 3 * 10⁸ m/s / 4000 * 10⁻¹° m = 7.50 * 10¹³ Hertz

Discussion

43.	The metallurgical process in which a metal is obtained in a fused state is called
Answer» The metallurgical process in which a METAL is OBTAINED in a fused STATE is called SMELTING..

Discussion

44.	The nucleus of an atom consists of
Answer» The nucleus of an atom CONSISTS of NEUTRONS and PROTONS .. The MASS of the atom is CONCENTRATED in the nucleus only..

Discussion

45.	The heat energy produced when the human body metabolises 1 gram of fat is
Answer» The AMOUNT of EVERGY PRODUCED is 9 CALORIES :)

Discussion

46.	The mass of one Avogadro number of helium atom is
Answer» 4.00 gram Plz be me FRND and MARK as BRAINLIEST and plz SAY THANKS

Discussion

47.	The major constituent of air is
Answer» NITROGEN is the MAJOR CONSTITUENT of AIR.

Discussion

48.	The formula C6H5-CO-CH3 represents
Answer» ACETOPHENONE is REPRESENTED by C6H5-CO-CH3

Discussion

49.	The method that cannot be used for removing permanent hardness of water is
Answer» the method that cannot be used nfor removing PERMANENT hardness of WATER is "BOILING"....

Discussion

50.	What is lone pair of electrons?
Answer» LONE PAIR of electrons refers to a pair of valence electrons that are not shared with ANOTHER atom.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

What are isoelectronic?

Definition of law of conservation of mass

Extraction of metals of low reactivity silver

Butanone is a four-carbon compound with functional group?

Ethanoic acid is commonly called a

What is silicons and explain the bhor,s model of atomic theory?

Who proposed atomic theory?

Why NaHCO3 is added in preparation of soap?

Who discovered chemistry?

I want an easy explaination of CHARLES and BOYLES law

What is the S.T.P(standard temperature and pressure )

What are the earth metals that are titrated using non aqueous titration?

A chemical reaction in which oxygen is used but carbon dioxide is not produced.

The most abundant rare gas in the atmosphere is

The names of the scientists, Newlands, Mendeleev, and Meyer are associated with the development of

The metal that is usually extracted from sea water is

The most important ore of aluminium is

The ionisation energy of hydrogen atom in the ground state is x KJ. The energy required for an electron to jump from 2nd orbit to 3rd orbit is

The most commonly used bleaching agent is

Information about extraction of metals of low reactivity silver, platinum and gold

The nucleus of a hydrogen atom consists of

The maximum number of covalent formed by nitrogen is

The material which can be deformed permanently by heat and pressure is called a

The metal that is used as a catalyst in the hydrogenation of oils is

The mass of P4O10 that will be obtained from the reaction of 1.33 gram of P4 and 5.07 of oxygen is

The gas present in the stratosphere which filters out some of the sun's ultraviolet light and provides an effective shield against radiation damage to living things is

The hardest form of carbon is

The number of waves in n x 10th Bohr's orbit are

The human body is made up of several chemical elements; the element present in the highest proportion (65%) in the body is

The molecular formula of phosphorous is

When soap is prepared by cold process, a small amount of sodium carbonate is added to:a)make the soap hardb)increase the pHgive explaination for choosing ur answer

The gas used in the manufacture of vanaspati from vegetable oil is

The National Chemical Laboratory is situated in

The gas used for artificial ripening of green fruit is

The oil used in the froth floatation process is

Who discoverd the lead

Equal masses of oxygen, hydrogen and methane are kept under identical conditions. The ratio of the volumes of gases will be

The nuclear particles which are assumed to hold the nucleons together are

The Latin word formica means ant. The name formic acid is derived from this Latin word because

Calculate de broglie's wawelength for an electron travelling at one % the speed of lightcalculate frequency of a radiation whose wawelength is 4000 angstroms

The metallurgical process in which a metal is obtained in a fused state is called

The nucleus of an atom consists of

The heat energy produced when the human body metabolises 1 gram of fat is

The mass of one Avogadro number of helium atom is

The major constituent of air is

The formula C6H5-CO-CH3 represents

The method that cannot be used for removing permanent hardness of water is

What is lone pair of electrons?