52639 + Interview Questions in Secondary School in Chemistry

1.	Al +H2So4=Al2 (So4)3+H2 balance the chemical equation
Answer» Here is your answer 2Al + 3 H2SO4 = AL2(SO4)3 + 3H2 may be CORRECT

Discussion

2.	What isthe percentage of w/W pf sugar solution containing 14gm sugar in 186gm water
Answer» HI mate. THANKS for ASKING this question. Here is your answer, Given : Mass of solute = 14g. Mass of SOLUTION = 14 +186 = 200 gm. We KNOW that, $\frac{w}{w}\% = \frac{mass \: of \: solute}{mass \: of \: solution} \times 100$ $\frac{w}{w}\% = \frac{14}{200} \times 100$ $\frac{w}{w}\% = \frac{7}{100} \times 100$ $\frac{w}{w} \% = \: 7 \: \%$ Thank you. BE BRAINLY !!!!!!!!!!!!

Discussion

3.	State 4 points of difference between electrovalent and covalent compound
Answer» -Electrovalent compounds are made up of ions. -Electrovalent compounds are heard, crystalline solids e.g. Na CI, Mg CL2 -Electrovalent compounds are usually soluble in water but insoluble in non-polar solvents like CI4 -Electrovalent compounds generally have HIGH melting and BOILING points. -Covalent compounds are FORMED by mutual sharing of electrons as in NH3 -Covalent compounds are made up of molecules. -Covalent compounds are usually liquids or gases. E.g. CH4, C2 H6, NH3 -Covalent compounds are soluble in non-polar solvents like benzene or carbon

3.

State 4 points of difference between electrovalent and covalent compound

Answer»

-Electrovalent compounds are made up of ions.

-Electrovalent compounds are heard, crystalline solids e.g. Na CI, Mg CL2

-Electrovalent compounds are usually soluble in water but insoluble in non-polar solvents like CI4

-Electrovalent compounds generally have HIGH melting and BOILING points.

-Covalent compounds are FORMED by mutual sharing of electrons as in NH3

-Covalent compounds are made up of molecules.

-Covalent compounds are usually liquids or gases. E.g. CH4, C2 H6, NH3

-Covalent compounds are soluble in non-polar solvents like benzene or carbon

Discussion

4.	Give a reason why true solutions does not exhibit tyndall effect.
Answer» TYNDALL effect is in fact the definite test to SHOW the difference between a true and a COLLOIDAL solution. Please mark my ANSWER as the brainliest :)

4.

Give a reason why true solutions does not exhibit tyndall effect.

Answer»

TYNDALL effect is in fact the definite test to SHOW the difference between a true and a COLLOIDAL solution.

Please mark my ANSWER as the brainliest

:)

Discussion

5.	The correct order of in which the o-o bond length increases , h2o2, o2 , o3 with explanation.. must
Answer» O2,H2o3,o3 Bond STRENGTH is directly PROPORTIONAL to stability Bond length is inversely proportional to bond strength so most stable molecules have shortest bond lengths In stability O2>H2o2>o3 Bond length INCREASES in this order

Discussion

6.	All elements in same column in priodic table as borob have common
Answer» YES.............................. .

Discussion

7.	Plz answerwrite the number of atom in 32 gram of oxygen molecule?
Answer» Hey mate here is your answer》》 And SINCE one MOLECULE of O2 contains two atoms, no. of atoms= 2× 6.023× 10²³. 32 GM of oxygen has 2 X 6.023x10^23 atoms. Since, oxygen exists in our nature as a molecule O2. Hope this answer will help you..《《

Discussion

8.	During the formation of addition polymerization, which smaller molecules you think are eliminated:A) H2OB) NH3 C) HClD) No one is eliminated
Answer» NH3 i THINK it will ELIMINATED

Discussion

9.	USES OF ELECTROPLATINGQUESTION FOR CLASS8ANSWER FASTIMP WORK TO DO
Answer» 1) to PROVIDE resistance to rust 2) to ENHANCE lustre 3) to make substances acquire some special properties LIKE such as conductivity MARK AS BRAINLIEST PLEASE

Discussion

10.	Fe +Cl2=FeCl3 balance the chemical equation
Answer» Here is UR ANS ☺☺☺☺☺☺☺☺☺☺☺☺☺☺☺

Discussion

11.	To check the pH of :-1) lemon juice, 2) chalk powder solution, 3) tomato juice, 4) soap solution, 5) tap solution
Answer» Hey Lemon juice It consist of citric acid so it CHANGES the litmus paper from blue to red The PH is below 7 Soap SOLUTION It is a BASE so the pH is above 7

11.

To check the pH of :-1) lemon juice, 2) chalk powder solution, 3) tomato juice, 4) soap solution, 5) tap solution

Answer»

Hey

Lemon juice

It consist of citric acid so it CHANGES the litmus paper from blue to red

The PH is below 7

Soap SOLUTION

It is a BASE so the pH is above 7

Discussion

12.	Which element belonges to8 group
Answer» HEY! Group 8 is a group of chemical element in the periodic table. It CONSISTS of iron (Fe), ruthenium (RU), osmium (Os) and hassium (Hs). They are all TRANSITION metals. I HOPE this helps you.

12.

Which element belonges to8 group

Answer»

HEY!

Group 8 is a group of chemical element in the periodic table. It CONSISTS of iron (Fe), ruthenium (RU), osmium (Os) and hassium (Hs). They are all TRANSITION metals.

I HOPE this helps you.

Discussion

13.	Does [Cr(h2o)6]2+ and [Fe(h2o)6]2+ have the same magnetic moment?
Answer» CANT you do by yourself

Discussion

14.	Compound X and aluminum are used to join railway tracks.a) Identify the compound Xb) Name the reactionc) write down the reactionI hope someone answers this real quick because i have my exam tomorrow
Answer» 1 IRON oxide (Fe2O3) 2 THERMITE REACTION 3 Fe2O3+ Al Gives AL2(O3)2+ Fe

Discussion

15.	Molecular formula of soaps
Answer» HEY, here is your answer The FORMULA of soaps is C 17 H 35 COONa. Hope it helps you

Discussion

16.	What is functional group write the alkylketone series
Answer» Ketones contain the carbonyl group bonded with TWO carbon atoms. Aldehydes and ketones are ORGANIC COMPOUNDS which incorporate a carbonyl functional group, C=O. The carbon atom of this group has two remaining BONDS that may be occupied by hydrogen, alkyl or aryl substituents. I hope this would help you.

16.

What is functional group write the alkylketone series

Answer»

Ketones contain the carbonyl group bonded with TWO carbon atoms. Aldehydes and ketones are ORGANIC COMPOUNDS which incorporate a carbonyl functional group, C=O. The carbon atom of this group has two remaining BONDS that may be occupied by hydrogen, alkyl or aryl substituents.

I hope this would help you.

Discussion

17.	What are the factors which affect on stability of metal.Ion and ligands?
Answer» METAL FACTORS i. Charge and size of metal ion. For a GIVEN ligand, the stability of complexes of METALLIC ions having the same charge on them decreases with the INCREASE of the size of the central metal ion.

Discussion

18.	From natural gas, we can get all of the following except _____.a) Carbon Black b) Coke c) Coal Tar d) Coal gasPlease answer fast. You will get 25 points and I will mark your answer brainliest!
Answer» $\textbf {\huge {\underline{Hey there!}}}$ $From Natural <klux>GAS</klux>, we can <klux>GET</klux> the following materials :-$ 1. Coke 2. Coal Tar 3. Coal gas 4. Ammonium liquids ☺ From Natural gas, we won't get Carbon BLACK. ( OPTION : A ) ☺ $\huge\bf\blue {Thanks}$ $\huge\bf\orange {BeBrainly}$

Discussion

19.	State the fraction of gold present in an carat gold piece
Answer» 1/24 th FRACTION of GOLD is present in an carat gold PIECE.

Discussion

20.	Write your question here (Keep it simple and clear to get the best answer)why aluminum cannot be reduced by carbon
Answer» Because ALUMINIUM are so REACTIVE that their OXIDES cannot be REDUCED by corbon. Hope it will HELP you

Discussion

21.	Define water pollution.what are the various sources of water pollution and their effect on environment
Answer» INDUSTRIES through tostic substances LIKE, FERTILIZER , pesticides , chemical , in a water this termed as water pollution The various sources of water pollution are: . Industrie todti substance . HUMAN WASTE *. Washing cloth in water

21.

Define water pollution.what are the various sources of water pollution and their effect on environment

Answer»

INDUSTRIES through tostic substances LIKE, FERTILIZER , pesticides , chemical , in a water this termed as water pollution

The various sources of water pollution are:

*. Industrie todti substance

*. HUMAN WASTE

*. Washing cloth in water

Discussion

22.	I want a chart of carbon compound used in everyday life
Answer» BAKING Power Soap Detergent Toothpaste Salt Vinegar Graphite Alcohol Bleaching Powder Sugar Aspirin Mouthwash Caustic soda Moth balls Chalk NaHCO3; sodium bicarbonateUsed for baking for cooking, releases CO2 in reaction with other ingredients2SoapEstersUsed for bathing and washing clothes3DetergentSodium sulphate, sodium hydroxide and phosphatecompoundsUsed for washing clothes4ToothpasteCalciuym carbonate, sodium flourideUsed for cleaning TEETH while brushing5SaltNaCl; Sodium ChlorideUsed in seasoning for cooking; also used as preservative6VinegarC2H4O2 acetic acid, ethanoic acid Used as preservative and for seasoning foods. Utilized for various household cleaning uses.7GraphiteCarbonUsed in Pencil8AlcoholEthanol(C2H6O)Used in alcoholic drinks9Bleaching PowderNaOClCommonly used domestic bleach. Used for cleaning purposes10SugarSucrose; C12H22O11Used in cooking as sweetner11AspirinC9H8O4; acetyl salicylic acidUsed in various medicines12MouthwashH2O2; hydrogen peroxide,Used for PERSONAL hygiene.13Caustic soda NaOH; sodium hydroxide It’s a highly corrosive alkali which is used for cleaning, unblocking sinks, DRAINS and toilets.14Moth ballsC6H4Cl2; 1,4-dichlorobenzeneHave strong pungent smell and is used for15Chalk CaCO3; calcium carbonate

Discussion

23.	What are soaps chemically how do they differ from synthetic detergents?
Answer» ANSWER... A soap is the sodium salt of a long chain carboxylic acid which has cleansing PROPERTY in water. Difference between soaps and detergents are as FOLLOWS:- SOAPS:- 1. Soap are the sodium salt of the long chain carboxylic acid. 2. The IONIC group of soap is -COO-Na+ 3. Soap are not suitable for washing purposes when the water is hard. 4. Soaps are biodegradable. 5. Soap have relative WEAK cleansing action. Detergents:- 1. Detergents are the sodium salt of the long chain benzene sulphoric acids or long chain alkyl hydrogensulphates. 2. The ionic group of detergent is -SO3-Na+ 3. Detergents are suitable for washing purposes EVEN when the water is hard. 4. Detergents are not biodegradable. 5. Detergents have strong cleansing action. Hope it helps Thanks...

23.

What are soaps chemically how do they differ from synthetic detergents?

Answer»

ANSWER...

A soap is the sodium salt of a long chain carboxylic acid which has cleansing PROPERTY in water.

Difference between soaps and detergents are as FOLLOWS:-

SOAPS:-

1. Soap are the sodium salt of the long chain carboxylic acid.

2. The IONIC group of soap is

-COO-Na+

3. Soap are not suitable for washing purposes when the water is hard.

4. Soaps are biodegradable.

5. Soap have relative WEAK cleansing action.

Detergents:-

1. Detergents are the sodium salt of the long chain benzene sulphoric acids or long chain alkyl hydrogensulphates.

2. The ionic group of detergent is

-SO3-Na+

3. Detergents are suitable for washing purposes EVEN when the water is hard.

4. Detergents are not biodegradable.

5. Detergents have strong cleansing action.

Hope it helps

Thanks...

Discussion

24.	Reaction between chlorine and hydrogen sulphide and name the yellow precipitate
Answer» The YELLOW PRECIPITATE is CHLORINE SULPHIDE

Discussion

25.	Structural formula of 2 bromo 4 methyl pent-2-ene
Answer» C6H11Br is the MOLECULAR FORMULA

Discussion

26.	Acid present in vinegar
Answer» Hi Here is ur ANSWER ##################################################### ACETIC ACID is PRESENT in Vinegar. ##################################################### HOPE it HELPS U

26.

Acid present in vinegar

Answer»

Hi

Here is ur ANSWER

#####################################################

ACETIC ACID is PRESENT in Vinegar.

#####################################################

HOPE it HELPS U

Discussion

27.	Odd one out with reason sodium carbonate , Acetic acid nitric acid , calcium hydroxide
Answer» CALCIUM HYDROXIDE as it is a BASE..... while OTHERS are ACIDS

Discussion

28.	Name the oxidising agents used for the conversion of ethanol into ethanoic acid. Distinguish between ethanol and ethanoic acid based on litmus test and reaction with sodium carbonate
Answer» Hey.. The oxidising agent can b either alkaline KMnO4 or acidified K2Cr2O7.. On litmus test :- ETHANOL changes red litmus to blue.. Ethanoic acid changes blue litmus to red. On reaction wid NA2CO3 :- Ethanol does not react wid Na2CO3.. Ethanoic acid reacts wid Na2CO3 to give CO2.. 2CH3COOH + Na2CO3 ------> 2CH3COONa + H2O + CO2 HOPE DIS HELPS UH...

Discussion

29.	1.The nucleus of an atom consists of ________2.The number of moles of solute present in 1 kg of a solvent is called its _________3.The most electro negative element among the following is ________
Answer» Here is your answers friend 1. PROTONS and neutrons 2. molality 3. fluorine Hope it helps you Mark me as BRANILIEST

Discussion

30.	To identify the organic compound and function group in given organic compounf
Answer» _Maps/General_Chemistry/Map%3A_Chemistry_(Averill_and_Eldredge)/24%3A_Organic_Compounds/24.1%3A_Functional_Groups_and_Classes_of_Organic_Compounds 24.1: FUNCTIONAL GROUPS and Classes of ORGANIC COMPOUNDS

Discussion

31.	Product formed when v2o5 reacts with strong acid and strong base are respectively
Answer» TRUE a particular EVENT MAY not comprise any particular thing. yet it may be connected to it. it MIGHT influence and might be influenced by the event. If you like me and my answer, give me thanks and love by FOLLOWING me.

31.

Product formed when v2o5 reacts with strong acid and strong base are respectively

Answer»

TRUE

a particular EVENT MAY not comprise any particular thing. yet it may be connected to it. it MIGHT influence and might be influenced by the event.

If you like me and my answer, give me thanks and love by FOLLOWING me.

Discussion

32.	What is the effect of acitic acid on blue litmus paper?
Answer» The LITMUS PAPER CHANGE in RED COLOUR

Discussion

33.	Al 3+ exists but B 3+ does not .why?
Answer» HEY MATE HERE IS YOUR ANSWER ❤️❤️❤️ Atomic no. of Boron(B) is 5. Electronic configuration of B= 1s²2s²2p¹. Due to small size of atom (B) and extra STABILITY of fully filled orbital i.e.(B+ =1s²2s²) a very large AMOUNT of energy is REQUIRED to remove 2 more electrons from 2s orbital which is practically not possible.therefore B+3 does not exist and B+ therefore exist. HOPE IT HELPS.❤️❤️❤️❤️

Discussion

34.	Name one compound and mixture
Answer» COMPOND- methane mixture- SOIL

Discussion

35.	NH2CONH2 WHAT IS NAME OF THIS COMPOUND
Answer» Frnd this MAY be the answer.... The NAME of the GIVEN COMPOUND is urea... plsark the answer as the brainliest...

Discussion

36.	The SI unit of calorific value is not used by anyone . Why?
Answer» Bcoz the calorific value has not GAINED IMPORTANCE WORLDWIDE like the other quantities

Discussion

37.	Psc school si previous question paper
Answer» RATHER than asking these u just STUDY ur text and u can score MARKS easily

Discussion

38.	An elemnet x has mass no 35 and number of neutron 18. write atomic number and electronic configuration of x
Answer» NUMBER of neutrons=mass number-atomic number 18=35-z z=35-18 z=17

Discussion

39.	Compound having all three bonds
Answer» (NH4+)ION is the COMPOUND

Discussion

40.	How many pi bond and sigma bond are present in CH3COOH (full solve)
Answer» 5 sigma bonds and 1 PI bond it CONTAINS.

Discussion

41.	1) choose metal from the reactive series which will not react with steam 2) choose one metal which will safely react with dilute sulphuric acid name the salt formed when the chosen metal in reacts with sulphuric acid
Answer» ANSWER---- ◆ ZINC, Iron and aluminum are do not react with steam. ◆ Zinc will SAFETY react with dilute sulphuric acid. EQUATION = Zn + H2SO4 --- ZnSO4 + H2 ZnSO4 is salt formed when the Zinc metal reacts with dilute sulphuric acid. HOPE ITS HELPS YOU...... ANY DOUBTS YOU CAN ASK ME.... THANK YOU.....

Discussion

42.	Why is electron promotion not essential in case of hybridisation?
Answer» Promotion of electrons is not essential PRIOR to HYBRIDIZATION. this means that for hybridization to take PLACE, it is not necessary that the electrons should be excited and promoted to higher ENERGY LEVEL. electrons when excited jump to higher energy level. so this is not necessary before hybridization takes place.

Discussion

43.	S8 molecule is shaped like
Answer» The SHAPE of S8 is octathiocane or a RING LIKE STRUCTURE

Discussion

44.	What is the effect of electron donating group on acidity of alcohols
Answer» They effect of DONATING the GROUP the make weak ALCOHOLS and acidity

Discussion

45.	Name one element in which corrosion is not proved to be wasteful and how it’s used ?(2 marks)
Answer» In Aluminium, Beryllium, Chromium etc.... corrosion results in a thin oxide layer FORMATION. This renders it a inert layer on SURFACE which prevents further corrosion. THUS, in those elements corrosion is proved to be useful. In case of aluminium, the layer formed is Al₂O₃(Aluminium oxide) layer.

45.

Name one element in which corrosion is not proved to be wasteful and how it’s used ?(2 marks)

Answer»

In Aluminium, Beryllium, Chromium etc.... corrosion results in a thin oxide layer FORMATION. This renders it a inert layer on SURFACE which prevents further corrosion. THUS, in those elements corrosion is proved to be useful.

In case of aluminium, the layer formed is Al₂O₃(Aluminium oxide) layer.

Discussion

46.	6 l of gas at ntp are found to have a mass of 11 g. The molecular mass of the gas is
Answer» 66 will be the MOLECULAR MASS of GAS.

Discussion

47.	Hello guysgood evening.needed poem or quote on fake friends.follow meguysssplsssss
Answer» THE TWO FRIENDS AND THE BEAR MARK AS BRAINIEST

Discussion

48.	Why acetic acid called a weak acid though there are 4 'H' atoms in the molecule?
Answer» There is ph VALUE is due to THISE reason the ACETIC accid is weak sceand one is one is not easly brakedown in WATER thise are reason the are weak ACID

Discussion

49.	The oxidation and coordination number of cr in [cr(c2o4)3]3- is
Answer» Here c2o4 oxalate ion has a CHARGE of -2 and the total charge of complex ion is -3 so going mathematically, Let charge of cr be x, Then, x + 3(-2) = -3 x -6 = -3 x = 6 - 3 x= 3 Therefore charge of cr in [cr(c2o4)3]3- is +3. Hoped it helped you :)

49.

The oxidation and coordination number of cr in [cr(c2o4)3]3- is

Answer»

Here c2o4 oxalate ion has a CHARGE of -2 and the total charge of complex ion is -3 so going mathematically,

Let charge of cr be x,

Then,

x + 3(-2) = -3

x -6 = -3

x = 6 - 3

x= 3

Therefore charge of cr in [cr(c2o4)3]3- is +3.

Hoped it helped you :)

Discussion

50.	What is the chemical process for photosynthesis shown below is incomplete. Complete the equation in either symboles or words
Answer» Carbon DIOXIDE + Water (in PRESENCE of SUNLIGHT and CHLOROPHYLL) CARBOHYDRATES+ Oxygen

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Al +H2So4=Al2 (So4)3+H2 balance the chemical equation

What isthe percentage of w/W pf sugar solution containing 14gm sugar in 186gm water

State 4 points of difference between electrovalent and covalent compound

Give a reason why true solutions does not exhibit tyndall effect.

The correct order of in which the o-o bond length increases , h2o2, o2 , o3 with explanation.. must

All elements in same column in priodic table as borob have common

Plz answerwrite the number of atom in 32 gram of oxygen molecule?

During the formation of addition polymerization, which smaller molecules you think are eliminated:A) H2OB) NH3 C) HClD) No one is eliminated

USES OF ELECTROPLATINGQUESTION FOR CLASS8ANSWER FASTIMP WORK TO DO

Fe +Cl2=FeCl3 balance the chemical equation

To check the pH of :-1) lemon juice, 2) chalk powder solution, 3) tomato juice, 4) soap solution, 5) tap solution

Which element belonges to8 group

Does [Cr(h2o)6]2+ and [Fe(h2o)6]2+ have the same magnetic moment?

Compound X and aluminum are used to join railway tracks.a) Identify the compound Xb) Name the reactionc) write down the reactionI hope someone answers this real quick because i have my exam tomorrow

Molecular formula of soaps

What is functional group write the alkylketone series

What are the factors which affect on stability of metal.Ion and ligands?

From natural gas, we can get all of the following except _____.a) Carbon Black b) Coke c) Coal Tar d) Coal gasPlease answer fast. You will get 25 points and I will mark your answer brainliest!

State the fraction of gold present in an carat gold piece

Write your question here (Keep it simple and clear to get the best answer)why aluminum cannot be reduced by carbon

Define water pollution.what are the various sources of water pollution and their effect on environment

I want a chart of carbon compound used in everyday life

What are soaps chemically how do they differ from synthetic detergents?

Reaction between chlorine and hydrogen sulphide and name the yellow precipitate

Structural formula of 2 bromo 4 methyl pent-2-ene

Acid present in vinegar

Odd one out with reason sodium carbonate , Acetic acid nitric acid , calcium hydroxide

Name the oxidising agents used for the conversion of ethanol into ethanoic acid. Distinguish between ethanol and ethanoic acid based on litmus test and reaction with sodium carbonate

1.The nucleus of an atom consists of ________2.The number of moles of solute present in 1 kg of a solvent is called its _________3.The most electro negative element among the following is ________

To identify the organic compound and function group in given organic compounf

Product formed when v2o5 reacts with strong acid and strong base are respectively

What is the effect of acitic acid on blue litmus paper?

Al 3+ exists but B 3+ does not .why?

Name one compound and mixture

NH2CONH2 WHAT IS NAME OF THIS COMPOUND

The SI unit of calorific value is not used by anyone . Why?

Psc school si previous question paper

An elemnet x has mass no 35 and number of neutron 18. write atomic number and electronic configuration of x

Compound having all three bonds

How many pi bond and sigma bond are present in CH3COOH (full solve)

1) choose metal from the reactive series which will not react with steam 2) choose one metal which will safely react with dilute sulphuric acid name the salt formed when the chosen metal in reacts with sulphuric acid

Why is electron promotion not essential in case of hybridisation?

S8 molecule is shaped like

What is the effect of electron donating group on acidity of alcohols

Name one element in which corrosion is not proved to be wasteful and how it’s used ?(2 marks)

6 l of gas at ntp are found to have a mass of 11 g. The molecular mass of the gas is

Hello guysgood evening.needed poem or quote on fake friends.follow meguysssplsssss

Why acetic acid called a weak acid though there are 4 'H' atoms in the molecule?

The oxidation and coordination number of cr in [cr(c2o4)3]3- is

What is the chemical process for photosynthesis shown below is incomplete. Complete the equation in either symboles or words

1.The nucleus of an atom consists of ____2.The number of moles of solute present in 1 kg of a solvent is called its _3.The most electro negative element among the following is ____