8881 + Interview Questions in Chemistry in Class 10 Page 100 InterviewSolution

4951.	If two liquids are mutually soluble, they are called ......... liquids.
Answer» MISCIBLE immiscible insoluble VISCOUS SOLUTION :miscible

Discussion

4952.	If the valency of an element is 2, then it lies in group ............
Answer» ANSWER :2

Discussion

4953.	IF the reactantsare gases, increasingtheirpressuredecreases the reactionrate .
Answer» Solution :correct STATEMENT: if THEREACTANTS are GASES , increasing theirpressureincreases the reactionrate .

Discussion

4954.	If the rate with respect to O_(2) , NO and NO_(2) are respectively (-Delta[O_(2)])/(Deltat),(-1)/(2),(Delta[NO])/(Deltat),(+1)/(2)(Delta[NO_(2)])/(Deltat) then the corresponding chemical equation is 2NO +O_(2) to 2NO_(2)
Answer» ANSWER :1

Discussion

4955.	If the phosphate of a metal has the formula MPO_(4)the formula of the metallic sulphate is _____________
Answer» ANSWER :`M_(2)(SO_(4))_(3)`

Discussion

4956.	IF thepH ofrainwater is lessthan 7 thenit is called _________.
Answer» SOLUTION :ACIDRAIN

Discussion

4957.	If the pH of a solution is 4.5,what is its pOH?
Answer» SOLUTION :PH+pOH=14 pOH=14-4.5=9.5 pOH=9.5

Discussion

4958.	If the nuclide of actinium 89^(Ac^(228)), emits beta particle, the daughter nuclide will be
Answer» `88^(Ra^(228))` `90^(Th^(228))` `87^(FR^(224))` `90^(Th^(229))` Answer :B

Discussion

4959.	If the molecule is made of similar kind of atoms, it is called …………….. .
Answer» SOLUTION :HOMO ATOMIC MOLECULE

Discussion

4960.	If themolecularmass ofa compoundis expressedin grams, it iscalledas _______.
Answer» SOLUTION :GRAM MOLECULARMASS

Discussion

4961.	If the molecular formula of an organic compound is C_10H_18. It is:
Answer» alkene alkane ALKYNE Not a HYDROCARBON ANSWER :A

Discussion

4962.	If the long form of periodic table the total number of periods is
Answer» 5 7 8 9 Solution :THER are SEVEN PERIODS in the MODERN PERIODIC table.

Discussion

4963.	If the formation of NO and O_(2)from NO_(2), the rate of production of
Answer» NO and `O_(2)` are equal NO is DOUBLE the rate of CONSUMPTION of `NO_(2)` NO is twice the rate of PRODUCTION of `O_(2)` `O_(2)` is twice the rate of production of NO Solution :In the formation of NO and `O_(2)` from `NO_(2)` , the rate of production of `NO ` is twice the rate of production of `O_(2)` because `2NO_(2) hArr 2NO +O_(2)`

Discussion

4964.	If the first member of alkynes is C_2H_2,what is the formula of the fifth member of this family?
Answer» SOLUTION :`C_6H_10`

Discussion

4965.	If the first member of alkanes is CH_4,what is the formula of the first member of alkynes?
Answer» SOLUTION :`C_2H_2`

Discussion

4966.	If the element with atomic number 18 is a noble gas, to which group do you expect the elements with atomic numbers 17 and 19 belong?
Answer» SOLUTION :GROUP 17 and group 1 RESPECTIVELY

Discussion

4967.	If the electronegativity difference between two elementsis less than 1.7 the bond is 50% ionic and 50% covalent.
Answer» SOLUTION :Correct Statement : If ELECTRONEGATIVITY differenceis LESS than 1.7, the bond is covalent .

Discussion

4968.	If the electronegativity difference between two bonded atoms in amolecule is greater than 1.7, the nature of bonding is ………..
Answer» SOLUTION :IONIC BOND

Discussion

4969.	If the distance between two Cl atoms in Cl_(2) molecule is 1.98 Å, then the radius of Cl atom is …………….. .
Answer» SOLUTION :`R(CL) = (d(Cl-Cl))/(2) = (1.98)/(2) = 0.99 Å`

Discussion

4970.	If the differencein electronegative between two element is 1.7 , the bond has ……………..and……………. .
Answer» Solution : 50% IONIC characte, 50% COVALENT CHARACTER

Discussion

4971.	If the difference in electronegativity between two elements is less than 1.7 the bonds is considered to be …………… .
Answer» SOLUTION : COVALENT

Discussion

4972.	If the differencein electro negativity between two elements is less than 1.7, the bondis consideredto be ____________.
Answer» SOLUTION :COVALENT

Discussion

4973.	If the density of methanol is 0.793 kg L^(–1), what is its volume needed for making 2.5 L of its 0.25 M solution?
Answer» ANSWER : 0.0025 L

Discussion

4974.	If the consecutive ionisation energies of an element A are 496, 4564, 6918, 9542 kJ// mole respectively, the formula of the oxide formed by A is
Answer» (a) `A_(2)O_(3)` (B) AO (C) `AO_(2)` (d) `A_(2)O` Solution :In element A there is a large DIFFERENCE between I and II ionisation energies, so, it can form the STABLE ION `A^(+)` the oxide of A Would be `A_(2)O.`

Discussion

4975.	In the balanced reaction aFe_(2)O_(3) + bH_(2) to cFe + dH_(2)O a, b, c and d, respectivel, are
Answer» 1,1,2,3 1,1,1,1 1,3,2,3 1,2,2,3 Solution :`Fe_(2)O_(3)+3H_(2)to2Fe+3H_(2)O` In the balanced chemical equation, the COEFFICIENTS are 1,3,2,3

Discussion

4976.	If the azimuthal quantam number of an electron is 2 then the shape of orbitals is "____________"
Answer» ANSWER :DOUBLE DUMBBELL

Discussion

4977.	If the atomic number of an elements is 13, it will be placed in the periodic table in
Answer» GROUP 1 Group 3 Group 13 Group 11 Answer :C

Discussion

4978.	If the atomic mass of sodium is 23 amu, then the mass of 3.011xx10^(23) sodium atoms is ………….. .
Answer» 11.5 kg 23 g 0.5 mole 11.5 g Solution :HINT : `"Mass of "6.023xx10^(23)" SODIUM atoms"="23 AMU = 23g"` `THEREFORE"Mass of "3.011xx10^(23)" sodium atoms"` `=(23)/(6.023xx10^(23))xx3.011xx10^(23)=11.5g`

Discussion

4979.	If the angular momentum of an electron is 3.16xx10^(-34) kg m^2//s and the radius and energy of an orbit in which the above electron is present is 0.6xx10^(-10)m and 2.4xx10^(-18) respectively then eal-culate the radius and energy of 2nd orbit of that atom.
Answer» Solution :(i) QUANTISATION of angular momentum (ii) calculation of PRINCIPAL quantum NUMBER from angular momentum (III) calculation of radius Q (IV) calculation of energy of an electron

Discussion

4980.	If ten volumes of dihydrogen gas reacts with five volumes of dioxygen gas, how many volumes of water vapour could be produced?
Answer» Solution :`H_(2) and O_(2)` react ACCORDING to the equation `H_(2(g))+O_(2(g))RARR 2H_(2)O_((g))` THUS, 2 volumes of `H_(2)` react with 1 volume of `O_(2)` to produce 2 volumes of water vapour. Hence, 10 volumes of `H_(2)` will react completely with 5 volumes of `O_(2)` to produce 10 volumes of water vapour.

Discussion

4981.	If ten volumes of dihydrogen gas react with five volumes of dioxygen gas, how much volume of water vapour would be produced ?
Answer» ANSWER : 10 VOLUMES

Discussion

4982.	If someone is suffering from the problem of acidity after overeating , which of the following would you suggest as a remedy ? Lemon juice , Bakig soda solution or Vinegar.
Answer» Solution :BAKING soda solution becauseit is a base and hence NEUTRALISES the EXCESS ACID present in the stomach.

Discussion

4983.	If soil is acidic, which compound would you spread to treat the soil ?
Answer» Solution :Calcium OXIDE, CaO or slaked lime, `CA(OH)_2` or calcium CARBONATE, `CaCO_3`

Discussion

4984.	If r=(-3)/(2)(Delta[A])/(Deltat)=(-5)/(2)(Delta[B])/(Deltat)=(+7)/(3)([DeltaC])/(Deltat),which of the following is the corresponding reaction ?
Answer» 2/3 A + 2/5 B `to` 3/7 C 2/3 A +5/2 B `to` 7/3 C 3/2A + 5/2B `to` 7/3C 7/3C + 5/2 B `to` 3/2A Answer :A

Discussion

4985.	if pH ofrainwateris approximately7, thenit iscalledacidrain .
Answer» SOLUTION :CORRECT STATEMENT : ifpHof rainwaterisapporximately7 , THENIT iscalledrain .

Discussion

4986.	If pH of a solution is 4, its [H^+] is
Answer» `10^(-2)` M `10^4 ` M `1/(10^4)` M `10^(-6) M` ANSWER :C

Discussion

4987.	If organic compounds contains carbon and other atoms like O, N, S etc., these compounds are called……………….
Answer» SOLUTION :HETEROCYCLIC COMPOUNDS

Discussion

4988.	If one hydrogen atom of propane is replaced by a ketone group, then the molecular formula of the compound obtained is
Answer» `C_4H_8O` `C_3H_8O` `C_3H_6O` `C_4H_10 O` SOLUTION :`C_4H_8O`

Discussion

4989.	If Na_2 CO_3 is added to the solution of H_3 CO_3 the pH of H_2 CO_3 solution
Answer» decreases increases REMAINS constant cannot be predicted Answer :D

Discussion

4990.	If K_(c)for the formation of HI from H_(2) and I_(2) each is 64, then calculate K_(c) for the decomposition of 1 mole of HI.
Answer» Solution :`H_(2) + I_(2) hArr 2HI` `1//2H_(2)+ 1//2 I_(2) hArr HI` `IMPLIES K_(c_(1))=([HI]^(2))/([H_(2)]^(1)[I_(2)]^(1)) implies K_(c_(2))=([HI])/([H_(2)]^(1//2)[I_(2)]^(1//2))` `therefore K_(c_(2))=(1)/(sqrt(K_(c_(1))))=(1)/(sqrt(64))=(1)/(8)=0.125`

Discussion

4991.	If K_(C) for the formatiion of ammonia is 2 mol^(-2) L^(2), K_(c) for decoposition of ammonia is________.
Answer» ANSWER :`0.5 MOL^(2)//1^(2)`

Discussion

4992.	If K_(c ) = 1, what will be the value of Delta G?
Answer» ANSWER :ZERO

Discussion

4993.	If element A belongs to group 3 and the second period of the periodic table , which of the following sets of properties would it exhibit ?
Answer» LIQUID , most metallic GASEOUS, MODERATELY metallic Solid, nonmetallic Solid, lessmetallic ANSWER :B

Discussion

4994.	If Delta H = +ve and Delta S = +ve, the rection is spontaneous at ……. Temperature
Answer» ANSWER :HIGH

Discussion

4995.	If copper metal is heated over a flame it develops a coating. What is the colour and composition of coating ?
Answer» SOLUTION :We get black COATING of `CuO`, COPPER oxide.

Discussion

4996.	If copper is kept in open air, it slowly loses its shining brown surface and covered with a green colour coating. It is due to the formation of
Answer» `CuCO_(3)` `CUO+CuCO_(3)` `Cu(OH)_(2).CuCO_(3)` `CuO` ANSWER :C

Discussion

4997.	If an ore contains impurity of SiO_(2), identify the appropriate flux for the removal of it
Answer» ANSWER :A

Discussion

4998.	IF an ironnailis placedin anaqueoussolutionof coppersulphatethe ________displaces_______fromitsaqueoussolution.
Answer» SOLUTION :IRON , COPPER

Discussion

4999.	If an element X is placed in group 14, what will be the formula and the nature of bonding of its chloride?
Answer» Solution : The formula will be `XCl_4` . The element X of GROUP 14 will have 4 valence ELECTRONS. So, it shares its 4electrons and form covalent BOND with 4 chlorine ATOMS.

Discussion

5000.	If an element has seven electrons in its outermost shell then it is likely to have the _____[largest/smallest] atomic size among all the elements in the same period.
Answer» SOLUTION :SMALLEST

Discussion

Explore topic-wise InterviewSolutions in .

If two liquids are mutually soluble, they are called ......... liquids.

If the valency of an element is 2, then it lies in group ............

IF the reactantsare gases, increasingtheirpressuredecreases the reactionrate .

If the rate with respect to O_(2) , NO and NO_(2) are respectively (-Delta[O_(2)])/(Deltat),(-1)/(2),(Delta[NO])/(Deltat),(+1)/(2)(Delta[NO_(2)])/(Deltat) then the corresponding chemical equation is 2NO +O_(2) to 2NO_(2)

If the phosphate of a metal has the formula MPO_(4)the formula of the metallic sulphate is _____________

IF thepH ofrainwater is lessthan 7 thenit is called _________.

If the pH of a solution is 4.5,what is its pOH?

If the nuclide of actinium 89^(Ac^(228)), emits beta par­ticle, the daughter nuclide will be

If the molecule is made of similar kind of atoms, it is called …………….. .

If themolecularmass ofa compoundis expressedin grams, it iscalledas _______.

If the molecular formula of an organic compound is C_10H_18. It is:

If the long form of periodic table the total number of periods is

If the formation of NO and O_(2)from NO_(2), the rate of production of

If the first member of alkynes is C_2H_2,what is the formula of the fifth member of this family?

If the first member of alkanes is CH_4,what is the formula of the first member of alkynes?

If the element with atomic number 18 is a noble gas, to which group do you expect the elements with atomic numbers 17 and 19 belong?

If the electronegativity difference between two elementsis less than 1.7 the bond is 50% ionic and 50% covalent.

If the electronegativity difference between two bonded atoms in amolecule is greater than 1.7, the nature of bonding is ………..

If the distance between two Cl atoms in Cl_(2) molecule is 1.98 Å, then the radius of Cl atom is …………….. .

If the differencein electronegative between two element is 1.7 , the bond has ……………..and……………. .

If the difference in electronegativity between two elements is less than 1.7 the bonds is considered to be …………… .

If the differencein electro negativity between two elements is less than 1.7, the bondis consideredto be ____________.

If the density of methanol is 0.793 kg L^(–1), what is its volume needed for making 2.5 L of its 0.25 M solution?

If the consecutive ionisation energies of an element A are 496, 4564, 6918, 9542 kJ// mole respectively, the formula of the oxide formed by A is

In the balanced reaction aFe_(2)O_(3) + bH_(2) to cFe + dH_(2)O a, b, c and d, respectivel, are

If the azimuthal quantam number of an electron is 2 then the shape of orbitals is "____________"

If the atomic number of an elements is 13, it will be placed in the periodic table in

If the atomic mass of sodium is 23 amu, then the mass of 3.011xx10^(23) sodium atoms is ………….. .

If the angular momentum of an electron is 3.16xx10^(-34) kg m^2//s and the radius and energy of an orbit in which the above electron is present is 0.6xx10^(-10)m and 2.4xx10^(-18) respectively then eal-culate the radius and energy of 2nd orbit of that atom.

If ten volumes of dihydrogen gas reacts with five volumes of dioxygen gas, how many volumes of water vapour could be produced?

If ten volumes of dihydrogen gas react with five volumes of dioxygen gas, how much volume of water vapour would be produced ?

If someone is suffering from the problem of acidity after overeating , which of the following would you suggest as a remedy ? Lemon juice , Bakig soda solution or Vinegar.

If soil is acidic, which compound would you spread to treat the soil ?

If r=(-3)/(2)(Delta[A])/(Deltat)=(-5)/(2)(Delta[B])/(Deltat)=(+7)/(3)([DeltaC])/(Deltat),which of the following is the corresponding reaction ?

if pH ofrainwateris approximately7, thenit iscalledacidrain .

If pH of a solution is 4, its [H^+] is

If organic compounds contains carbon and other atoms like O, N, S etc., these compounds are called……………….

If one hydrogen atom of propane is replaced by a ketone group, then the molecular formula of the compound obtained is

If Na_2 CO_3 is added to the solution of H_3 CO_3 the pH of H_2 CO_3 solution

If K_(c)for the formation of HI from H_(2) and I_(2) each is 64, then calculate K_(c) for the decomposition of 1 mole of HI.

If K_(C) for the formatiion of ammonia is 2 mol^(-2) L^(2), K_(c) for decoposition of ammonia is________.

If K_(c ) = 1, what will be the value of Delta G?

If element A belongs to group 3 and the second period of the periodic table , which of the following sets of properties would it exhibit ?

If Delta H = +ve and Delta S = +ve, the rection is spontaneous at ……. Temperature

If copper metal is heated over a flame it develops a coating. What is the colour and composition of coating ?

If copper is kept in open air, it slowly loses its shining brown surface and covered with a green colour coating. It is due to the formation of

If an ore contains impurity of SiO_(2), identify the appropriate flux for the removal of it

IF an ironnailis placedin anaqueoussolutionof coppersulphatethe ________displaces_______fromitsaqueoussolution.

If an element X is placed in group 14, what will be the formula and the nature of bonding of its chloride?

If an element has seven electrons in its outermost shell then it is likely to have the _____[largest/smallest] atomic size among all the elements in the same period.

If the nuclide of actinium 89^(Ac^(228)), emits beta particle, the daughter nuclide will be

IF an ironnailis placedin anaqueoussolutionof coppersulphatethe __displaces_fromitsaqueoussolution.