(A) The total number of isotopes of hydrogen is $3$. These are protium $({}_{1}^{1}H)$,deuterium (${}_{1}^{2}H$ or $D$),and tritium (${}_{1}^{3}H$ or

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(A) The total number of isotopes of hydrogen is $3$. These are protium $({}_{1}^{1}H)$,deuterium (${}_{1}^{2}H$ or $D$),and tritium (${}_{1}^{3}H$ or $T$). Among these,only tritium $({}_{1}^{3}H)$ is a radioactive isotope. Therefore,the total number of isotopes is $3$ and the number of radioactive isotopes is $1$. Hence,the correct option is $A$.

Class 11 Chemistry Hydrogen Hydrogen

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The total number of isotopes of hydrogen and the number of radioactive isotopes among them,respectively,are:

JEE MAIN 2019 All JEE MAIN

A
$3$ and $1$
B
$3$ and $2$
C
$2$ and $1$
D
$2$ and $0$

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Hydrogen

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Which one of the following properties has the same value for $H_2$ and $D_2$?

EasyAP EAMCET 2019

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Match List-$I$ (Fuels) with List-$II$ (Composition) and select the correct answer using the codes given below the lists.

List-$I$ (Fuels) List-$II$ (Composition)

$A$. Water gas $i$. $A$ mixture of $CO$ and $N_2$

$B$. Producer gas $ii$. Methane

$C$. Coal gas $iii$. $A$ mixture of $CO$ and $H_2$

$D$. Natural gas $iv$. $A$ mixture of $CO$,$H_2$,$CH_4$ and $CO_2$

Choose the correct sequence for $A-B-C-D$ respectively:

List-$I$ (Fuels)	List-$II$ (Composition)
$A$. Water gas	$i$. $A$ mixture of $CO$ and $N_2$
$B$. Producer gas	$ii$. Methane
$C$. Coal gas	$iii$. $A$ mixture of $CO$ and $H_2$
$D$. Natural gas	$iv$. $A$ mixture of $CO$,$H_2$,$CH_4$ and $CO_2$