11242 + Mcqs in Chemistry Page 89 McqOptions

4401.	Isotopes differ in [NCERT 1973]
A.	Number of protons
B.	Valency
C.	Chemical reactivity
D.	Number of neutrons
Answer» E.

Discussion

4402.	The \[\beta \]-decay of \[_{11}N{{a}^{24}}\] produces an isotope of [NCERT 1978]
A.	Mg
B.	Na
C.	Al
D.	Ne
Answer» B. Na

Discussion

4403.	An isotope of oxygen has mass number 18. Other isotopes of oxygen will have the same [MP PMT 1985; MADT Bihar 1981]
A.	Mass number
B.	Atomic weight
C.	Number of neutrons
D.	Number of protons
Answer» E.

Discussion

4404.	Positron emission results from the transformation of one nuclear proton into neutron. The isotope thus produced possesses [MP PMT 1990]
A.	Same mass number
B.	Higher nuclear charge
C.	Intense radioactivity
D.	No radioactivity
Answer» B. Higher nuclear charge

Discussion

4405.	Atoms in hydrogen gas have preponderance of [CPMT 1972]
A.	\[_{1}{{H}^{1}}\] atoms
B.	Deuteron atoms
C.	Tritium atoms
D.	All the three A, B and C are in equal proportion
Answer» B. Deuteron atoms

Discussion

4406.	\[_{18}A{{r}^{40}},{{\,}_{20}}C{{a}^{40}}\] and \[_{19}{{K}^{40}}\] are [MNR 1983; DPMT 1991; EAMCET 1992; RPMT 1997; Pb.CET 2000]
A.	Isomers
B.	Isotopes
C.	Isobars
D.	Isotones
Answer» D. Isotones

Discussion

4407.	Two atoms have the same atomic mass but different atomic numbers. Such atoms are called as [NCERT 1971, 76; IIT 1983]
A.	Isotopes
B.	Isobars
C.	Isomer
D.	Isoelectronic
Answer» C. Isomer

Discussion

4408.	Which of the following is an isobaric pair [CPMT 1987, 93]
A.	\[_{6}{{C}^{13}},{{\,}_{7}}{{N}^{13}}\]
B.	\[_{6}{{C}^{13}},{{\,}_{7}}{{N}^{14}}\]
C.	\[_{7}{{N}^{14}},{{\,}_{8}}{{O}^{15}}\]
D.	\[_{7}{{N}^{13}},{{\,}_{8}}{{O}^{15}}\]
Answer» B. \[_{6}{{C}^{13}},{{\,}_{7}}{{N}^{14}}\]

Discussion

4409.	The symbol of an isotope is \[_{32}{{X}^{65}}\], this reveals that [MP PET 1991]
A.	Its atomic number is 32 and atomic weight is 65
B.	Its atomic number is 65
C.	It has 65 electrons
D.	It has 32 neutrons
Answer» B. Its atomic number is 65

Discussion

4410.	Which character is different of the two isotopes of an element [NCERT 1971; EAMCET 1980, 92; CPMT 1992]
A.	Atomic mass
B.	Atomic number
C.	Number of electrons
D.	Number of protons
Answer» B. Atomic number

Discussion

4411.	If a radioactive isotope with atomic number A and mass number M emits an \[\alpha \]-particle, the atomic number and mass number of that new isotope will become [NCERT 1980]
A.	A ? 2, M ? 4
B.	A ? 2, M
C.	A, M ? 2
D.	A ? 4, M ? 2
Answer» B. A ? 2, M

Discussion

4412.	Atomic weight of the isotope of hydrogen which contains 2 neutrons is the nucleus would be [CPMT 1980]
A.	2
B.	3
C.	1
D.	4
Answer» C. 1

Discussion

4413.	Addition of two neutrons in an atom \[A\] would [AMU 1984]
A.	Change the chemical nature of \[A\]
B.	Produce an isobar of \[A\]
C.	Produce an isotope of A
D.	Produce another element
Answer» D. Produce another element

Discussion

4414.	The isotope \[_{92}{{U}^{235}}\] decays in a number of steps to an isotope of lead \[_{82}P{{b}^{207}}\]. The groups of particles emitted in this process will be [MP PMT 1987]
A.	\[4\alpha ,\,7\beta \]
B.	\[6\alpha ,\,4\beta \]
C.	\[7\alpha ,\,4\beta \]
D.	\[10\alpha ,\,8\beta \]
Answer» D. \[10\alpha ,\,8\beta \]

Discussion

4415.	Which of the following properties are different for neutral atoms of isotopes of the same element [EAMCET 1987; NCERT 1971; CPMT 1976; MP PET 1994]
A.	Mass
B.	Atomic number
C.	General chemical reactions
D.	Number of electrons
Answer» B. Atomic number

Discussion

4416.	An element \['A'\] emits an \[\alpha \]-particle and forms \['B'.\,'A'\] and \['B'\] are [DPMT 1990]
A.	Isotopes
B.	Isobars
C.	Isotones
D.	Isodiasphere
Answer» E.

Discussion

4417.	Isotopes are those which contain [RPMT 1997]
A.	Same number of neutrons
B.	Same physical properties
C.	Same chemical properties
D.	Different atomic mass
Answer» D. Different atomic mass

Discussion

4418.	The atomic number of bromine is 35 and its atomic weight is 79. Two isotopes of bromine are present in equal amounts. Which of the following statements represents the correct number of neutrons [NCERT 1983]
A.	First isotope 34 Second isotope 36
B.	First isotope 44 Second isotope 46
C.	First isotope 45 Second isotope 47
D.	First isotope 79 Second isotope 81
Answer» C. First isotope 45 Second isotope 47

Discussion

4419.	O ? 18 isotope of oxygen will have [CPMT 1972, 79]
A.	18 protons
B.	9 protons and 9 neutrons
C.	8 neutrons and 10 protons
D.	10 neutrons and 8 protons
Answer» E.

Discussion

4420.	\[_{6}{{C}^{11}}\] and \[_{5}{{B}^{11}}\] are referred as [NCERT 1978]
A.	Nuclear isomers
B.	Isobars
C.	Isotopes
D.	Fission products
Answer» C. Isotopes

Discussion

4421.	Which of the following is an isotonic pair [AMU (Engg.) 2000]
A.	\[_{19}^{40}K,\,_{20}^{40}Ca\]
B.	\[_{19}^{39}K,\,_{20}^{40}Ca\]
C.	\[_{18}^{33}Ar,\,_{\,18}^{40}Ar\]
D.	\[_{18}^{40}Ar,\,_{\,20}^{40}Ca\]
Answer» C. \[_{18}^{33}Ar,\,_{\,18}^{40}Ar\]

Discussion

4422.	Difference in \[_{17}C{{l}^{35}}\] and \[_{17}C{{l}^{37}}\] is of [AFMC 2000]
A.	Atomic number
B.	Number of protons
C.	Number of neutrons
D.	Number of electrons
Answer» D. Number of electrons

Discussion

4423.	The maximum sum of the number of neutrons and protons in an isotope of hydrogen is [Pb. PMT 2001]
A.	4
B.	5
C.	6
D.	3
Answer» E.

Discussion

4424.	Which of the following species is isotonic with \[_{37}R{{b}^{86}}\] [BHU 2001]
A.	\[_{36}K{{r}^{84}}\]
B.	\[_{37}R{{b}^{85}}\]
C.	\[_{38}S{{r}^{87}}\]
D.	\[_{39}{{Y}^{89}}\]
Answer» D. \[_{39}{{Y}^{89}}\]

Discussion

4425.	Which property is different for neutral atoms of the two isotopes of the same element [JIPMER 2001]
A.	Number of protons
B.	Atomic number
C.	Number of neutrons
D.	None of these
Answer» D. None of these

Discussion

4426.	\[_{20}{{X}^{40}}\] and \[_{21}{{X}^{40}}\] are [CPMT 1996]
A.	Isobars
B.	Isotopes
C.	Isotones
D.	Isostereomers
Answer» B. Isotopes

Discussion

4427.	Isobaric atoms may contain
A.	Same number of \[{{p}^{+}}\] and different number of \[{{n}^{0}}\]
B.	Same number of \[{{n}^{0}}\] and different number of \[{{p}^{+}}\]
C.	Same number of both \[{{p}^{+}}\] and \[{{n}^{0}}\]
D.	Different numbers of both \[{{p}^{+}}\] and \[{{n}^{0}}\]
Answer» E.

Discussion

4428.	Isotones are elements having [Bihar MEE 1996; Bihar CEE 1995]
A.	Same mass number but different neutrons
B.	Same atomic number but different neutrons
C.	Same atomic number, mass number and neutrons
D.	Different atomic and mass number but same neutrons
Answer» E.

Discussion

4429.	Which of the following statement is false [Manipal MEE 1995]
A.	In chlorine gas, the ratio of \[C{{l}^{35}}\] and \[C{{l}^{37}}\] is 1 : 3
B.	The hydrogen bomb is based on the principle of nuclear fusion
C.	The atom bomb is based on the principle of nuclear fission
D.	The penetrating power of a proton is less than that of an electron
Answer» B. The hydrogen bomb is based on the principle of nuclear fusion

Discussion

4430.	Tritium is an isotope of [DPMT 1985]
A.	Hydrogen
B.	Titanium
C.	Tantalum
D.	Tellurium
Answer» B. Titanium

Discussion

4431.	Which of the following isotopes is likely to be most stable [EAMCET 1982]
A.	\[_{30}Z{{n}^{71}}\]
B.	\[_{30}Z{{n}^{66}}\]
C.	\[_{30}Z{{n}^{64}}\]
D.	None of these
Answer» D. None of these

Discussion

4432.	An isotope of ?parent? is produced, when its nucleus loses [CPMT 1987; MP PET 1991]
A.	One \[\alpha \]-particle
B.	One \[\beta \]-particle
C.	One \[\alpha \] and two \[\beta \]-particles
D.	One \[\beta \] and two \[\alpha \]- particles
Answer» D. One \[\beta \] and two \[\alpha \]- particles

Discussion

4433.	Nuclei of isotopes differ in [CPMT 1986, 90; MP PMT 1987]
A.	The number of protons
B.	The number of neutrons
C.	The number of protons and neutrons both
D.	None of these
Answer» C. The number of protons and neutrons both

Discussion

4434.	In the following radioactive transformation \[R\xrightarrow{\alpha }X\xrightarrow{\beta }Y\xrightarrow{\beta }Z\]; the nuclei \[R\] and \[Z\] are [BHU 1987]
A.	Isotopes
B.	Isobars
C.	Isomers
D.	Isotones
Answer» B. Isobars

Discussion

4435.	Whose number is common in isotopes [AIIMS 1988]
A.	Proton
B.	Neutron
C.	Proton and neutron
D.	Nucleon
Answer» B. Neutron

Discussion

4436.	Isotopes of an element have [MNR 1985]
A.	Similar chemical properties but different physical properties
B.	Similar chemical and physical properties
C.	Similar physical properties but different chemical properties
D.	Different chemical and physical properties
Answer» B. Similar chemical and physical properties

Discussion

4437.	Atomic weights of carbon, nitrogen and oxygen are 12, 14 and 16 respectively. An atom of atomic weight 14 and nuclear charge + 6 is an isotope of
A.	Oxygen
B.	Carbon
C.	Nitrogen
D.	None of these
Answer» C. Nitrogen

Discussion

4438.	Radioactive isotopes that have an excessive neutron/proton ratio generally exhibit
A.	\[{{e}^{-}}\] emission
B.	\[_{2}H{{e}^{4}}\] emission
C.	\[{{e}^{+}}\] emission
D.	K -electron capture
Answer» B. \[_{2}H{{e}^{4}}\] emission

Discussion

4439.	Substances which have identical chemical properties but differ in atomic weights are called [EAMCET 1980, 83; DPMT 1985; MNR 1982]
A.	Isothermals
B.	Isotopes
C.	Isentropus
D.	Elementary particles
Answer» C. Isentropus

Discussion

4440.	Emission of \[\beta \]-particle by an atom of an element results in the formation of its [BHU 1979; DPMT 1985; KCET 1999]
A.	Isotope
B.	Isomer
C.	Isomorph
D.	Isobar
Answer» E.

Discussion

4441.	Coordination isomerism is caused by the interchange of ligands between the [UPSEAT 2002]
A.	Cis and Trans structure
B.	Complex cation and complex anion
C.	Inner sphere and outer sphere
D.	Low oxidation and higher oxidation states
Answer» B. Complex cation and complex anion

Discussion

4442.	\[{{[Ti{{({{H}_{2}}O)}_{6}}]}^{+3}}\] is paramagnetic in nature due to [RPMT 2002]
A.	One unpaired \[{{e}^{-}}\]
B.	Two unpaired \[{{e}^{-}}\]
C.	Three unpaired \[{{e}^{-}}\]
D.	No unpaired \[{{e}^{-}}\]
Answer» B. Two unpaired \[{{e}^{-}}\]

Discussion

4443.	Which would exhibit ionisation isomerism [MP PET 1997]
A.	\[\left[ Cr{{\left( N{{H}_{3}} \right)}_{6}} \right]C{{l}_{3}}\]
B.	\[\left[ Co{{\left( N{{H}_{3}} \right)}_{5}}Br \right]S{{O}_{4}}\]
C.	\[\left[ Cr{{(en)}_{2}}C{{l}_{2}} \right]\]
D.	\[\left[ Cr{{(en)}_{3}}C{{l}_{3}} \right]\]
Answer» C. \[\left[ Cr{{(en)}_{2}}C{{l}_{2}} \right]\]

Discussion

4444.	\[\left[ Co{{\left( N{{H}_{3}} \right)}_{4}}C{{l}_{2}} \right]N{{O}_{2}}\] and \[\left[ Co{{\left( N{{H}_{3}} \right)}_{4}}Cl.N{{O}_{2}} \right]Cl\] are ........ isomers [MP PMT 1993; MP PET 1995, 2001]
A.	Geometrical
B.	Optical
C.	Linkage
D.	Ionization
Answer» E.

Discussion

4445.	(i) \[{{K}_{4}}[Fe{{(CN)}_{6}}]\] (ii) \[{{K}_{3}}[Cr{{(CN)}_{6}}]\](iii) \[{{K}_{3}}[Fe{{(CN)}_{6}}]\] (iv) \[{{K}_{2}}[Ni{{(CN)}_{4}}\] Choose the complex which is paramagnetic [Kerala CET 2005]
A.	(i), (ii) and (iii)
B.	(i), (iii)and (iv)
C.	(i), (iii) and (iv)
D.	(i), (ii) and (iv)
E.	(ii) and (iv)
Answer» D. (i), (ii) and (iv)

Discussion

4446.	What is the magnetic moment of \[{{K}_{3}}[Fe{{F}_{6}}]\] [Orissa JEE 2005]
A.	5.91 BM
B.	4.89 BM
C.	3.87 BM
D.	6.92 BM
Answer» B. 4.89 BM

Discussion

4447.	In coordination compound \[[Co{{(en)}_{2}}C{{l}_{2}}]Cl\] which is false [Kerala CET 2005]
A.	Show geometrical Isomerism
B.	Show optical Isomerism
C.	Show ionic Isomerism
D.	A octahedral complex
E.	A cationic complex
Answer» D. A octahedral complex

Discussion

4448.	The number of ions per mole of a complex \[[CoC{{l}_{2}}.5\,N{{H}_{3}}]C{{l}_{2}}\] in aqueous solution will be [MP PMT 2001]
A.	Nine
B.	Four
C.	Three
D.	Two
Answer» D. Two

Discussion

4449.	The colour of tetrammine copper (II) sulphate is
A.	Blue
B.	Red
C.	Violet
D.	Green
Answer» B. Red

Discussion

4450.	\[\left[ Co{{(N{{H}_{3}})}_{5}}Br \right]\]\[S{{O}_{4}}\] and \[\left[ Co{{(N{{H}_{3}})}_{5}}S{{O}_{4}} \right]Br\] are examples of which type of isomerism [MP PMT 1993, 94, 95; MP PET 1997; MP PET/PMT 1998]
A.	Linkage
B.	Geometrical
C.	Ionization
D.	Optical
Answer» D. Optical

Discussion

Explore topic-wise MCQs in Joint Entrance Exam - Main (JEE Main).

Isotopes differ in [NCERT 1973]

The \[\beta \]-decay of \[_{11}N{{a}^{24}}\] produces an isotope of [NCERT 1978]

An isotope of oxygen has mass number 18. Other isotopes of oxygen will have the same [MP PMT 1985; MADT Bihar 1981]

Positron emission results from the transformation of one nuclear proton into neutron. The isotope thus produced possesses [MP PMT 1990]

Atoms in hydrogen gas have preponderance of [CPMT 1972]

\[_{18}A{{r}^{40}},{{\,}_{20}}C{{a}^{40}}\] and \[_{19}{{K}^{40}}\] are [MNR 1983; DPMT 1991; EAMCET 1992; RPMT 1997; Pb.CET 2000]

Two atoms have the same atomic mass but different atomic numbers. Such atoms are called as [NCERT 1971, 76; IIT 1983]

Which of the following is an isobaric pair [CPMT 1987, 93]

The symbol of an isotope is \[_{32}{{X}^{65}}\], this reveals that [MP PET 1991]

Which character is different of the two isotopes of an element [NCERT 1971; EAMCET 1980, 92; CPMT 1992]

If a radioactive isotope with atomic number A and mass number M emits an \[\alpha \]-particle, the atomic number and mass number of that new isotope will become [NCERT 1980]

Atomic weight of the isotope of hydrogen which contains 2 neutrons is the nucleus would be [CPMT 1980]

Addition of two neutrons in an atom \[A\] would [AMU 1984]

The isotope \[_{92}{{U}^{235}}\] decays in a number of steps to an isotope of lead \[_{82}P{{b}^{207}}\]. The groups of particles emitted in this process will be [MP PMT 1987]

Which of the following properties are different for neutral atoms of isotopes of the same element [EAMCET 1987; NCERT 1971; CPMT 1976; MP PET 1994]

An element \['A'\] emits an \[\alpha \]-particle and forms \['B'.\,'A'\] and \['B'\] are [DPMT 1990]

Isotopes are those which contain [RPMT 1997]

The atomic number of bromine is 35 and its atomic weight is 79. Two isotopes of bromine are present in equal amounts. Which of the following statements represents the correct number of neutrons [NCERT 1983]

O ? 18 isotope of oxygen will have [CPMT 1972, 79]

\[_{6}{{C}^{11}}\] and \[_{5}{{B}^{11}}\] are referred as [NCERT 1978]

Which of the following is an isotonic pair [AMU (Engg.) 2000]

Difference in \[_{17}C{{l}^{35}}\] and \[_{17}C{{l}^{37}}\] is of [AFMC 2000]

The maximum sum of the number of neutrons and protons in an isotope of hydrogen is [Pb. PMT 2001]

Which of the following species is isotonic with \[_{37}R{{b}^{86}}\] [BHU 2001]

Which property is different for neutral atoms of the two isotopes of the same element [JIPMER 2001]

\[_{20}{{X}^{40}}\] and \[_{21}{{X}^{40}}\] are [CPMT 1996]

Isobaric atoms may contain

Isotones are elements having [Bihar MEE 1996; Bihar CEE 1995]

Which of the following statement is false [Manipal MEE 1995]

Tritium is an isotope of [DPMT 1985]

Which of the following isotopes is likely to be most stable [EAMCET 1982]

An isotope of ?parent? is produced, when its nucleus loses [CPMT 1987; MP PET 1991]

Nuclei of isotopes differ in [CPMT 1986, 90; MP PMT 1987]

In the following radioactive transformation \[R\xrightarrow{\alpha }X\xrightarrow{\beta }Y\xrightarrow{\beta }Z\]; the nuclei \[R\] and \[Z\] are [BHU 1987]

Whose number is common in isotopes [AIIMS 1988]

Isotopes of an element have [MNR 1985]

Atomic weights of carbon, nitrogen and oxygen are 12, 14 and 16 respectively. An atom of atomic weight 14 and nuclear charge + 6 is an isotope of

Radioactive isotopes that have an excessive neutron/proton ratio generally exhibit

Substances which have identical chemical properties but differ in atomic weights are called [EAMCET 1980, 83; DPMT 1985; MNR 1982]

Emission of \[\beta \]-particle by an atom of an element results in the formation of its [BHU 1979; DPMT 1985; KCET 1999]

Coordination isomerism is caused by the interchange of ligands between the [UPSEAT 2002]

\[{{[Ti{{({{H}_{2}}O)}_{6}}]}^{+3}}\] is paramagnetic in nature due to [RPMT 2002]

Which would exhibit ionisation isomerism [MP PET 1997]

\[\left[ Co{{\left( N{{H}_{3}} \right)}_{4}}C{{l}_{2}} \right]N{{O}_{2}}\] and \[\left[ Co{{\left( N{{H}_{3}} \right)}_{4}}Cl.N{{O}_{2}} \right]Cl\] are ........ isomers [MP PMT 1993; MP PET 1995, 2001]

(i) \[{{K}_{4}}[Fe{{(CN)}_{6}}]\] (ii) \[{{K}_{3}}[Cr{{(CN)}_{6}}]\](iii) \[{{K}_{3}}[Fe{{(CN)}_{6}}]\] (iv) \[{{K}_{2}}[Ni{{(CN)}_{4}}\] Choose the complex which is paramagnetic [Kerala CET 2005]

What is the magnetic moment of \[{{K}_{3}}[Fe{{F}_{6}}]\] [Orissa JEE 2005]

In coordination compound \[[Co{{(en)}_{2}}C{{l}_{2}}]Cl\] which is false [Kerala CET 2005]

The number of ions per mole of a complex \[[CoC{{l}_{2}}.5\,N{{H}_{3}}]C{{l}_{2}}\] in aqueous solution will be [MP PMT 2001]

The colour of tetrammine copper (II) sulphate is

\[\left[ Co{{(N{{H}_{3}})}_{5}}Br \right]\]\[S{{O}_{4}}\] and \[\left[ Co{{(N{{H}_{3}})}_{5}}S{{O}_{4}} \right]Br\] are examples of which type of isomerism [MP PMT 1993, 94, 95; MP PET 1997; MP PET/PMT 1998]