8881 + Interview Questions in Chemistry in Class 10 Page 61 InterviewSolution

3001.	the decompostionof calciumcarbonate intolime and carbondioxideis a_____ reaction .
Answer» SOLUTION :REVERSIBLE

Discussion

3002.	The decomposition reaction N_(2)O to N_(2) + O_(2) takes place on platinum surface. Here, the rate of reaction is independent of the concentrations of the reactant . However, when this reaction is carried out in the absence of platinum surface, the rate of reaction depends on the concentration of the reactant How do you account for this ?
Answer» SOLUTION :(i) role of PLANTINUM in the REACTION (ii) PROPERTY of platinum (iii) site of decomposition (iv) comparison of mechanism of reaction in the PRESENCE and absence of a catalyst

Discussion

3003.	The damage of the optic nerve, leading to blindness, is caused when………....is consumed.
Answer» ETHANOL METHANAL METHANOL ethanoic acid Answer :C

Discussion

3004.	The d-block elements are called _________ .
Answer» SOLUTION :TRANSITION ELEMENTS

Discussion

3005.	The creation of a reservoir behind the dam submerges a vast area of ____ and ____
Answer» ANSWER :GRASSLAND, VEGETATION

Discussion

3006.	The covalency of 'N' in NH_(4)^(+) ion is equal to number of
Answer» COVALENT BONDS co-ordinate bonds covalent bonds and co-ordinate bonds valence electrons Answer :C

Discussion

3007.	The covalency of oxygen in hydronium ion is equal to number of
Answer» covalent BONDS co-ordinate bonds covalent bonds and co-ordinate bonds valence electrons Solution :In hydronium ion both co-ordinate and covalent bonds are PRESENT. Hence, the COVALENCY of oxygen in hydronium ion is equal to number of covalent bonds and co-ordinate bonds.

Discussion

3008.	The cost of table salt ( NaCl )is Rs. 10 per Kg. calculate its cost per mole. ( Molar mass of NaCl is 58.5" gmol"^(-1) )
Answer» ANSWER :0.58 RS

Discussion

3009.	The corrosive action in the absence of moisture is called ……………… .
Answer» SOLUTION : DRY CORROSION

Discussion

3010.	The corrosive action in the presence of moisture is called wet corrosion.
Answer» SOLUTION :N/A

Discussion

3011.	The corrosion of iron is called _____
Answer» SOLUTION :RUSTING

Discussion

3012.	The corrosion of hightly reactive metal can be prevented by painting the metal surface with grease. (True / False)
Answer» ANSWER :T

Discussion

3013.	The correct structural formula of butanoitc acid is …
Answer» `H-UNDERSET(H)underset(\|)OVERSET(H)overset(\|)C-overset(H)overset(\|)C=overset(H)overset(\|)C-overset(O)overset(\|\|)C-OH` `H-underset(H)underset(\|)overset(H)overset(\|)C-underset(H)underset(\|)overset(H)overset(\|)C-underset(H)underset(\|)overset(H)overset(\|)C-underset(H)underset(\|)overset(H)overset(\|)C-overset(O)overset(\|\|)C-OH` `H-underset(H)underset(\|)overset(H)overset(\|)C-underset(H)underset(\|)overset(H)overset(\|)C-underset(H)underset(\|)overset(H)overset(\|)C-underset(H)underset(\|)overset(H)overset(\|)C-OH` `H-underset(H)underset(\|)overset(H)overset(\|)C-underset(H)underset(\|)overset(H)overset(\|)C-underset(H)underset(\|)overset(H)overset(\|)C-overset(O)overset(\|\|)C-OH` ANSWER :D

Discussion

3014.	The correct statement about fullerenes is
Answer» It is an allotrope of CARBON It is thermodynamically stable FORM of carbon Fullereves are ionic in nature It has an octahedral structure Solution :It is an allotrope of carbon

Discussion

3015.	The correct path of the movement of nerve impulses in the following diagram is
Answer» <P>`Q to S to R to P` `P to Q to R to S` `S to R to Q to P` `P to R to S to Q` ANSWER :D

Discussion

3016.	The correct order of the size of C, N,P,S follows the order
Answer» <P>` N LT C lt P lt S ` `C lt N lt S lt P` `C lt N lt P lt S` `N lt C lt S lt P` ANSWER :D

Discussion

3017.	The ionic radii of Na^(+),F^(-),O^(2-),N^(3-) follow the order
Answer» `Na^(+) LT F^(-) O^(2-) GT N^(3-)` `F^(-) lt O^(2-) lt N^(3) gt Na^(+)` `O^(2-) lt N^(3-) lt F ^(-) gt Na^(+)` `N^(3-) lt Na^(+) gt F ^(-) gt O^(2-)` ANSWER :A

Discussion

3018.	The correct increasing order of the atomic radii of the elements oxygen, fluorine and nitrogen is ..........
Answer» O, F, N N, F, O O, N, F F, O, N

Discussion

3019.	The correct electron dot structure of a water molecule is
Answer» `H.UNDERSET(* )overset( )O.H` `H:underset( )overset( )O.H` `H:underset( )overset( *)O:H` `H:O:H` Solution :Each hydrogen SHARES one electron with oxygen. Oxygen has two LONE pairs of ELECTRONS on it.

Discussion

3020.	The conversion of K_(2)Cr_(2)O_(7) into Cr_(2)(SO_(4))_(3) is a process of
Answer» Oxidation Reduction Decomposition Substitution Answer :B

Discussion

3021.	The ___________ contains the group 1 and 2 elements.
Answer» SOLUTION :s-block

Discussion

3022.	The construction of big dams leads
Answer» DROUGHTS poverty canal networks forestation ANSWER :C

Discussion

3023.	The construction of a dam disturbs the natural balance between the river valley and the animal population .
Answer» ANSWER :T

Discussion

3024.	The consitituents present in baking soda are
Answer» CALCIUM bicarbonate sodium hydrogencarbonate TARTARIC ACID Citric acid Answer :B::C

Discussion

3025.	The conductivity of a conductor is between (in ohm^(-1) m^(-1))
Answer» ` 10^4 - 10^6` ` 10^4 - 10^7` ` 10^4 - 10^5` ` 10^3 - 10^6` ANSWER :B

Discussion

3026.	The conduction of electricity through a solution involves the movement of _____
Answer» SOLUTION :CHARGED PARTICLES

Discussion

3027.	The conditions preferred by some plants are shown in the table below : {:("Plant","Apple","Potato","Black currant","Mint","Onion","Strawberry","Lettuce"),(pH,5.0-6.5,4.5-6.0,6.0-8.0,7.0-8.0,6.0-7.0,5.0-7.0,6.0-7.0):} (a) Which plants grow well over the largest range of pH values ? (b) Which plant can grow in the most acidic soil ? (c) Which plant can grow in the basic soil only ? (d) What is the pH range for onion to grow well ?
Answer» Solution :(a) Black CURRENT and strawberry (B) Potato (4.5 - 6.0) (C) Mint ( 7.0 - 8.0) (d) 6.0 - 7.0

Discussion

3028.	The concept of triads in the elements was given by
Answer» Newlands. DOBEREINER. Mendeleev. Bohr. Solution :Dobereiner GAVE the CONCEPT of TRIADS.

Discussion

3029.	The concentration of OH^(-) in a solution is 1.0xx10^(-10)M. The solution is
Answer» ACIDIC basic neutral None of these SOLUTION :In neutral solution at `25^(@)C` `[H^(+)]=[OH^(-)]=1.0xx10^(-7)M` if `[H^(+)]gt1.0xx10^(-7)MTO` acidic solution if `[OH^(-)]gt1.0xx10^(-7)Mto` basic solution SINCE `[OH^(-)]=1.0xx10^(10)lt1.0xx10^(-7)M`the solution is called acidic solution.

Discussion

3030.	The compounds of carbon and hydrogen are called____.
Answer» SOLUTION :HYDROCARBONS

Discussion

3031.	The compounds formedduringa chemicalreaction are_______.
Answer» SOLUTION :PRODUCTS

Discussion

3032.	The compound which gives effervescence with baking soda solution is
Answer» `C_2H_6O` `C_2H_5O` `C_2H_4O_2` `CH_3OCH_3` ANSWER :B

Discussion

3033.	The compound formed when ethene reacts with hydrogen is _____ (CH_4 , C_2H_6, C_3H_8)
Answer» SOLUTION :`C_2H_6`

Discussion

3034.	The compound formed by the reaction of an alcohol with carboxylic acid is known as…………………and the reaction is called………………….
Answer» SOLUTION :ESTER, ESTERIFICATION

Discussion

3035.	The compound containing 4 carbon and 8 hydrogen atoms is an _______. (alkane/ alkene)
Answer» SOLUTION :ALKENE

Discussion

3036.	The compound C_(5)H_(12) can be represented by the following two structures. (i) CH_(3)-CH_(2)-CH_(2)_CH_(2)-CH_(3) (ii)CH_(3)- underset(CH_(3))underset(\|)(CH)-CH_(2) -CH_(3) These two structures are related to each other as
Answer» allotropes isotopes isobars isomers Answer :D

Discussion

3037.	Consider the reaction CH_(3)CH_(2)CH_(2)OH overset(PCl_(5))toAunderset(KOH)overset(alc)toB. The compound 'B' is
Answer» PROPENE propyne PROPANE PROPANOL Solution :`A to CH_(3)-CH_(2)-Cl "" B to CH_(3)-CH=CH_(2)`

Discussion

3038.	The compositio of thermite mixture is
Answer» iron (III) oxide and aluminium powder in the RATO 1 : 3 aluminium powder and iron (III) oxide in the RATIO 1 : 3 aluminium powder and barium peroxide in the ratio 1 : 3 barium peroxide and aluminium in the ratio 1 : 3 Solution :Thermite mixture is 1 : 3 ratio of AL powder and ferric oxide.

Discussion

3039.	The components in solder are _____.
Answer» ANSWER :SN, PB

Discussion

3040.	The common name of sodium bicarbonate is
Answer» LIME BAKING powder baking SODA washing soda Solution :`NaHCO_(3)to` baking soda and `NaHCO_(3)+` tartaric acid is CALLED baking powder.

Discussion

3041.	The common name of methanoic acid is…………………
Answer» ACETIC ACID Formic acid Propionic acid BUTYRIC acid ANSWER :B

Discussion

3042.	The combustion of 1 mol of benzene takes place at 298 K. After combustion CO_(2) and H_(2)O are formed and 3267 kJ mol^(-1) of heat is liberated. Calculate Delta_(f) H^(0) (C_(6)H_(6)). Given: Delta_(f) H^(0) (CO_(2)) = -286kJ mol^(-1), Delta_(f) H^(0) (H_(2)O) = - 393 kJ mol^(-1)
Answer» SOLUTION :`48.51 KJ MOL^(-1)`

Discussion

3043.	Thecombinationof productsin a reversiblereactionsis called______ Reaction.
Answer» SOLUTION :BACKWARD

Discussion

3044.	The colour of the precipitate obtained when an aqueous solution sodium chloride is treated with silver nitrate solution is
Answer» black yellowish PINK CURDY WHITE ANSWER :D

Discussion

3045.	The colour of the precipitate formed by the reaction of lead nitrate with potassium iodine is.
Answer» WHITE Yellow Black Red

Discussion

3046.	The colour of copper sulphate solution changes when an iron nail is dipped in it. State the reason giving chemical equation for the reaction involved.
Answer» Solution :`CuSO_4+Fe to FeSO_4+Cu` (Blue) (Green) IRON is more REACTIVE than copper. Hence it displaces copper from copper sulphate and DUE to FORMATION of `FeSO_4`, the colour changes from blue to green.

Discussion

3047.	The colour of copper sulphate crystal is
Answer» red yellow green BLUE ANSWER :D

Discussion

3048.	The colour of the pH strip turned red when it was dipped into a sample. The sample could be:
Answer» DILUTE `NaHCO_(3)` solution tap water dilute NAOH solution dilute HCI Answer :D

Discussion

3049.	The colour change takes place when copper (II) oxide reacts with dilute hyfrochloric acid is….
Answer» BLUE to green Black to green Green to black Green to blue Answer :A::B::C

Discussion

3050.	The colour change take place when copper carbonate is strongly heated is……..
Answer» GREEN to black Green to blue Blue to green Blue to black Answer :A::B::C

Discussion

Explore topic-wise InterviewSolutions in .

the decompostionof calciumcarbonate intolime and carbondioxideis a_____ reaction .

The damage of the optic nerve, leading to blindness, is caused when………....is consumed.

The d-block elements are called _________ .

The creation of a reservoir behind the dam submerges a vast area of ____ and ____

The covalency of 'N' in NH_(4)^(+) ion is equal to number of

The covalency of oxygen in hydronium ion is equal to number of

The cost of table salt ( NaCl )is Rs. 10 per Kg. calculate its cost per mole. ( Molar mass of NaCl is 58.5" gmol"^(-1) )

The corrosive action in the absence of moisture is called ……………… .

The corrosive action in the presence of moisture is called wet corrosion.

The corrosion of iron is called _____

The corrosion of hightly reactive metal can be prevented by painting the metal surface with grease. (True / False)

The correct structural formula of butanoitc acid is …

The correct statement about fullerenes is

The correct path of the movement of nerve impulses in the following diagram is

The correct order of the size of C, N,P,S follows the order

The ionic radii of Na^(+),F^(-),O^(2-),N^(3-) follow the order

The correct increasing order of the atomic radii of the elements oxygen, fluorine and nitrogen is ..........

The correct electron dot structure of a water molecule is

The conversion of K_(2)Cr_(2)O_(7) into Cr_(2)(SO_(4))_(3) is a process of

The ___________ contains the group 1 and 2 elements.

The construction of big dams leads

The construction of a dam disturbs the natural balance between the river valley and the animal population .

The consitituents present in baking soda are

The conductivity of a conductor is between (in ohm^(-1) m^(-1))

The conduction of electricity through a solution involves the movement of _____

The concept of triads in the elements was given by

The concentration of OH^(-) in a solution is 1.0xx10^(-10)M. The solution is

The compounds of carbon and hydrogen are called____.

The compounds formedduringa chemicalreaction are_______.

The compound which gives effervescence with baking soda solution is

The compound formed when ethene reacts with hydrogen is _____ (CH_4 , C_2H_6, C_3H_8)

The compound formed by the reaction of an alcohol with carboxylic acid is known as…………………and the reaction is called………………….

The compound containing 4 carbon and 8 hydrogen atoms is an _______. (alkane/ alkene)

The compound C_(5)H_(12) can be represented by the following two structures. (i) CH_(3)-CH_(2)-CH_(2)_CH_(2)-CH_(3) (ii)CH_(3)- underset(CH_(3))underset(|)(CH)-CH_(2) -CH_(3) These two structures are related to each other as

Consider the reaction CH_(3)CH_(2)CH_(2)OH overset(PCl_(5))toAunderset(KOH)overset(alc)toB. The compound 'B' is

The compositio of thermite mixture is

The components in solder are _____.

The common name of sodium bicarbonate is

The common name of methanoic acid is…………………

The combustion of 1 mol of benzene takes place at 298 K. After combustion CO_(2) and H_(2)O are formed and 3267 kJ mol^(-1) of heat is liberated. Calculate Delta_(f) H^(0) (C_(6)H_(6)). Given: Delta_(f) H^(0) (CO_(2)) = -286kJ mol^(-1), Delta_(f) H^(0) (H_(2)O) = - 393 kJ mol^(-1)

Thecombinationof productsin a reversiblereactionsis called______ Reaction.

The colour of the precipitate obtained when an aqueous solution sodium chloride is treated with silver nitrate solution is

The colour of the precipitate formed by the reaction of lead nitrate with potassium iodine is.

The colour of copper sulphate solution changes when an iron nail is dipped in it. State the reason giving chemical equation for the reaction involved.

The colour of copper sulphate crystal is

The colour of the pH strip turned red when it was dipped into a sample. The sample could be:

The colour change takes place when copper (II) oxide reacts with dilute hyfrochloric acid is….

The colour change take place when copper carbonate is strongly heated is……..

The creation of a reservoir behind the dam submerges a vast area of and