8881 + Interview Questions in Chemistry in Class 10 Page 23 InterviewSolution

1101.	which of the following is least soluble in water ?
Answer» COMMON salt GLUCOSE POTASSIUM chloride Egg albumen Answer :A

Discussion

1102.	The rocky impurity associated with the ore is called ………………. Or ………………. .
Answer» SOLUTION : GANGUE , MATRIX

Discussion

1103.	Write the equation in the symbolic form with state symbols for the following reaction : Zinc + Sulphuric acid to Zinc sulphate + Hydrogen
Answer» Solution :`Zn(s)+H_(2)SO_(4)(AQ)toZnSO_(4)(aq)+H_(2)(G)`

Discussion

1104.	What should be added to pure iron to make stainlass steel ?
Answer» nickel and cobalt CADMIUM ANND CHROMIUM nickel and cadmium chromium and nickel Answer :D

Discussion

1105.	Write the balanced chemical equations for the following reactions : Barium chloride + Potassium sulphate to Barium sulphate + Potassium chloride
Answer» Solution :Balanced CHEMICAL EQUATIONS for the reactions are GIVEN as under : `BaCl_(2)+K_(2)SO_(4)toBaSO_(4)+2KCl`

Discussion

1106.	Which of the following statement is not correct?
Answer» all alkalies are BASES all bases are not alkalies all bases are alkalies all WATER SOLUBLE HYDROXIDES are alkalies Answer :C

Discussion

1107.	What type of bond is present in F_2 molecule ?
Answer» Solution :The BOND PRESENT in `F_2` MOLECULE is FORMED by sharing of electrons, HENCE it is covalent bond.

Discussion

1108.	Which of the following is the most reactive halogen ?
Answer» F Cl Br I ANSWER :A

Discussion

1109.	Whichof thefollowingcorrectlyrepresent 360g ofwater? (i)2 moleof H_2O(ii)20 moles of water (iii )6.023 xx10 ^(23)molecules of water (iv )1.2046 xx 10^(24)moleculeof water
Answer» (i) (i) and (IV ) (II) and (III ) (ii ) ANSWER :D

Discussion

1110.	The sumof thenumberof ______and_____ofan atomsis calleditsmassnumber .
Answer» SOLUTION :PROTONS, NEUTRONS

Discussion

1111.	Which of the following is determined with the help of universal indication ?
Answer» Acidity Basicity pH Neutrality ANSWER :C

Discussion

1112.	What is the pH of a solution when [H^(+)]=10^(-6)? Also tell the nature of the solution.
Answer» SOLUTION :`pH=-log_(10)[H^(+)]=-log_(10)(10^(-6))=-[-6log_(10)10]=6log_(10)10=6xx1=6`

Discussion

1113.	Which element has twice as many electrons in its second shell as in the first shell?
Answer» Be B C N Solution :C

Discussion

1114.	Which of the following are allotropes of carbon ?
Answer» Graphite DIAMOND Fullerene All of the above Solution :All the THREE are ALLOTROPES of CARBON.

Discussion

1115.	What is meant by oxidation and oxidising agent ?
Answer» SOLUTION :A process of adding oxygen to any substance is known as an oxidation. SUBSTANCES which are CAPABLE of adding oxygen to other substances are known as oxidising AGENTS.

Discussion

1116.	Which of the following metals is highly malleable ?
Answer» Gold Silver A and B both None of these Solution : A and B both

Discussion

1117.	What type of oxides are formed when non metals combine with oxygen ?
Answer» SOLUTION :Non-metals combines with oxygen to form acidic OXIDES. For example, `SO_2, SO_3, CO_2, Cl_2O_7`. ETC.

Discussion

1118.	When we take 1 ml ethanol and 1 ml ethanoic acid along with a few drops of concentrated sulphuric acid in a test-tube a sweet smelling substance is formed. Name the compound and give the balanced chemical equation for the reaction. What do we call the reverse reaction to give back alcohol and carboxylic acid which is used in the preparation of soap ?
Answer» SOLUTION : REVERSE REACTION = SAPONIFICATION

Discussion

1119.	Whensodiumcombineswithchlorine.itformsan ediblecompoundnamed______.
Answer» SOLUTION :SODIUMCHLORIDE

Discussion

1120.	Which gas is produced by reaction of base with metal?
Answer» CARBON dioxide Dioxygen Dihydrogeh Dinitrogen Answer :C

Discussion

1121.	Which of the following is hygroscopic in nature?
Answer» FERRIC chloride copper sulphate penta HYDRATE silica GEL none of the above Solution :silica gel

Discussion

1122.	Which of the following reacts with metal by displacing H-atom?
Answer» `CH_(4)` `C_(2)H_(6)` `C_(2)H_(4)` `C_(2)H_(2)` Solution :Hydrogen bonded to triple bonded carbon is ACIDIC in nature and is being REPLACED by METAL. `HC-=C-H+Na to HC-=C^(-)Na^(+)+1//2H_(2)`

Discussion

1123.	Write IUPAC name of the compound having the formula CH_3-CH=CH_2
Answer» SOLUTION : There are 3 C atoms in the continuous chain containing DOUBLE bond, therefore, the root word is .prop.. There is a double bond in the chain, therefore, the primary SUFFIX is .ene.. Thus, the IUPAC NAME of the given compound is Root word + Primary suffix Pent + ene = Propene

Discussion

1124.	What are the advantages of detergents over soaps?
Answer» Solution :Detergents are better than SOAPS because they: can be used in both hard and soft water and can clean more effectively in hard water than soap. can also be used in saline and acidic water. do not leave any soap scum on the tub or clothes. dissolve freely even in cool water and rinse freely in hard water. can be used for washing woollen garments, where as soap cannot be used. have a linear hydrocarbon chain, which is biodegradable. are ACTIVE emulsifiers of MOTOR GREASE. do an EFFECTIVE and safe cleansing, keeping even synthetic fabrics brighter and whiter.

Discussion

1125.	What is the next homologueof C_(3)H_(7)OH called?
Answer» Solution :The NEXT HOMOLOGUE of `C_(3)H_(7)OH` is CALLED butanol `(C_(4)H_(9)OH)`.

Discussion

1126.	There are some vacant places in Mendeleev's Periodic table. In some of these places, the atomic masses are seen to be predicted. Enlist three of these predicted atomic masses along with their group and period
Answer» SOLUTION :

Discussion

1127.	Write the balnced equation for the following chemical reactions : + Aluminium sulphate to Barium sulphate + Aluminium chloride
Answer» SOLUTION :Balaced equations In the symbolic from are given as under : `3BaCl_(2)+Al_(2)(SO_(4))_(3)to3BaSO_(4)+2AlCl_(3)`

Discussion

1128.	What happens when dehydrated copper sulphate is allowed to cool in air ?
Answer» SOLUTION :Dehydrated copper sulphate regains its blue COLOURS OBTAINING WATER molecules from the air.

Discussion

1129.	Which one of the following is the most abudant element in both the Earth's crust and in human body?
Answer» Carbon Silicon OXYGEN Hydrogen Solution :Oxygen

Discussion

1130.	Tomato contains tartaric acid.
Answer» Solution :False – TOMATO CONTAINS OXALIC ACID.

Discussion

1131.	Write the balanced chemical equations for the following reactions : Zinc + Silver nitrate to zinc nitrate + Silver
Answer» Solution :BALANCED CHEMICAL equations for the reactions are given as under : `Zn+2AgNO_(3)toZn(NO_(3))_(2)+2AG`

Discussion

1132.	three elements with filled outermost shells.
Answer» Solution :NEON (NE), ARGON (Ar) and KRYPTON (Kr)

Discussion

1133.	Which of the following is not correct about the trends when going from left to right across the periods of the periodic table ?
Answer» The elements become more non-metallic in nature. The NUMBER of valence electrons INCREASES. The atoms LOSE their electrons easily. The OXIDES become more acidic. ANSWER :A::C

Discussion

1134.	Which of the following is a weak base?
Answer» NaOH KOH `NH_4 OH` NONE of these Answer :C

Discussion

1135.	Water ____ means collecting rainwater.
Answer» SOLUTION :HARVESTING

Discussion

1136.	Which one of the following has the lowest number of molecules?
Answer» 1 litre of `N_(2)` 2 LITRES of `H_(2)` 3 litres of `O_(2)` 4 litres of `Cl_(2)` Solution :1 litre of `N_(2)`

Discussion

1137.	What is meant by 18 carat gold ?
Answer» Solution :6 PART of Ag or Cu MIXED with 18 PARTS of gold.

Discussion

1138.	Unit of ionic product of water is…..
Answer» `mol^(-2)dm^(-6)` `mol^(2)dm^(-6)` `mol^(2)dm^(-6)` `mol dm^(-3)` Answer :B::D

Discussion

1139.	Write two isoelectronic species with Br (35)
Answer» ANSWER :`KR^(+) , SE^(-1)`

Discussion

1140.	Which of the following is a decomposition reaction as well redoc reaction?
Answer» `2KBr+Cl_(2)to2KCl+Br_(2)` `2Na+H_(2)Oto2NaOH+H_(2)` `2MgOto2Mg+O_(2)` `ZnCO_(3)toZnO+CO_(2)` Solution :In `2mgOto2Mg+O_(2)` there is a decompositon of MgO into its CONSTITUENT ELEMENTS. SINCE there is a loss of oxygen from `MgO`, the reaction is a redox reaction.

Discussion

1141.	The solution of a weak acid and a strong base is alkaline.
Answer» SOLUTION :NA

Discussion

1142.	Which one is the characteristic of carbon compounds?
Answer» Carbon COMPOUNDS have high MELTING and BOILING point Carbon compounds show isomerism Carbon compounds are ELECTROVALENT compounds Carbon compounds are not combustible Answer :B

Discussion

1143.	Which one of the following types of medicines is used for treating indigestion ?
Answer» ANTIBIOTIC Analgesic ANTACID Antiseptic SOLUTION :Antacid

Discussion

1144.	Which amongst the following is not an alkalne earth metal ?
Answer» Mg Ba Fr Sr Answer :C

Discussion

1145.	When a soap or detergent is dissolved in water, the molecules join together as clusters called……………….
Answer» SOLUTION :MICELLES

Discussion

1146.	Which of the following pairs will give displacement reactions ?
Answer» NACL SOLUTION and copper METAL `MgCl_2`solution and aluminium metal `FeSO_4`solution and silver metal `AgNO_3`solution and copper metal Solution : `AgNO_3`solution and copper metal

Discussion

1147.	Write the two possible compounds of molecular formula C_(3)H_(6)O.
Answer» SOLUTION :`CH_(3)CH_(2)CHO` : PROPANAL `CH_(3)COCH_(3)` : Propanone.

Discussion

1148.	Which of the following hydrocarbons undergo addition reactions? C_(2)H_(6), C_(3)H_(8), C_(3)H_(6), C_(2)H_(2) and CH_(4)
Answer» Solution :The unsaturated hydrocarbons UNDERGO addition reactions. Out of the given hydrocarbons, `C_(3)H_(6)` (alkene) and `C_(2)H_(2)` (alkyne) are unsaturated. THEREFORE, `C_(3)H_(6)` and `C_(2)H_(2)` will undergo addition reactions.

Discussion

1149.	When a when powdered solid is dropped in water, it produces a hissing sound. What the solid may be ?
Answer» SOLUTION :QUICKLIME (CAO).

Discussion

1150.	Write the balanced chemical equation for the following and identify the type of reaction in each case. (a) Potassium bromide(aq) + Barium iodide(aq) rarr Potassium iodide(aq) + Barium bromide(s) (b) Zinc carbonate(s) rarr Zinc oxide(s) + Carbon dioxide(g) (d) Magnesium(s) + Hydrochloric acid(aq) rarr Magnesium chloride(aq) + Hydrogen(g)
Answer» Solution :(a) `2KBr(AQ)+BaI_(2)(aq)rarr2KI(aq)+BaBr_(2)(s)`, Double displacement reaction (B) `ZnCO_(3)(s)rarrZnO(s)+CO_(2)(g)`, Decomposition reaction (c ) `H_(2)(g)+Cl_(2)(g)rarr2HCl(g)`, Combination reaction (d) `Mg(s)+2HCl(aq)rarrMgCl_(2)(aq)+H_(2)(g)`, Displacement reaction

Discussion

Explore topic-wise InterviewSolutions in .

which of the following is least soluble in water ?

The rocky impurity associated with the ore is called ………………. Or ………………. .

Write the equation in the symbolic form with state symbols for the following reaction : Zinc + Sulphuric acid to Zinc sulphate + Hydrogen

What should be added to pure iron to make stainlass steel ?

Write the balanced chemical equations for the following reactions : Barium chloride + Potassium sulphate to Barium sulphate + Potassium chloride

Which of the following statement is not correct?

What type of bond is present in F_2 molecule ?

Which of the following is the most reactive halogen ?

Whichof thefollowingcorrectlyrepresent 360g ofwater? (i)2 moleof H_2O(ii)20 moles of water (iii )6.023 xx10 ^(23)molecules of water (iv )1.2046 xx 10^(24)moleculeof water

The sumof thenumberof ______and_____ofan atomsis calleditsmassnumber .

Which of the following is determined with the help of universal indication ?

What is the pH of a solution when [H^(+)]=10^(-6)? Also tell the nature of the solution.

Which element has twice as many electrons in its second shell as in the first shell?

Which of the following are allotropes of carbon ?

What is meant by oxidation and oxidising agent ?

Which of the following metals is highly malleable ?

What type of oxides are formed when non metals combine with oxygen ?

Whensodiumcombineswithchlorine.itformsan ediblecompoundnamed______.

Which gas is produced by reaction of base with metal?

Which of the following is hygroscopic in nature?

Which of the following reacts with metal by displacing H-atom?

Write IUPAC name of the compound having the formula CH_3-CH=CH_2

What are the advantages of detergents over soaps?

What is the next homologueof C_(3)H_(7)OH called?

There are some vacant places in Mendeleev's Periodic table. In some of these places, the atomic masses are seen to be predicted. Enlist three of these predicted atomic masses along with their group and period

Write the balnced equation for the following chemical reactions : + Aluminium sulphate to Barium sulphate + Aluminium chloride

What happens when dehydrated copper sulphate is allowed to cool in air ?

Which one of the following is the most abudant element in both the Earth's crust and in human body?

Tomato contains tartaric acid.

Write the balanced chemical equations for the following reactions : Zinc + Silver nitrate to zinc nitrate + Silver

three elements with filled outermost shells.

Which of the following is not correct about the trends when going from left to right across the periods of the periodic table ?

Which of the following is a weak base?

Water ____ means collecting rainwater.

Which one of the following has the lowest number of molecules?

What is meant by 18 carat gold ?

Unit of ionic product of water is…..

Write two isoelectronic species with Br (35)

Which of the following is a decomposition reaction as well redoc reaction?

The solution of a weak acid and a strong base is alkaline.

Which one is the characteristic of carbon compounds?

Which one of the following types of medicines is used for treating indigestion ?

Which amongst the following is not an alkalne earth metal ?

When a soap or detergent is dissolved in water, the molecules join together as clusters called……………….

Which of the following pairs will give displacement reactions ?

Write the two possible compounds of molecular formula C_(3)H_(6)O.

Which of the following hydrocarbons undergo addition reactions? C_(2)H_(6), C_(3)H_(8), C_(3)H_(6), C_(2)H_(2) and CH_(4)

When a when powdered solid is dropped in water, it produces a hissing sound. What the solid may be ?

The sumof thenumberof __and_ofan atomsis calleditsmassnumber .