Monohar Pandey Solutions for Exercise 11: Exercise 11

Synthetic gas is a mixture of

Consider the following statements
$1$. Sea weeds are important source of I₂.
$2$. Bleaching powder is obtained by the interaction of Cl₂ and dry slaked lime.
$3$. Chlorine is mixed in water so that bacteria are killed.
$4$. Hydrofluoric acid is not preserved in glass bottle because it reacts with silica of glass.
Which of the above is/are true?

Assertion $\left(A\right)$ Phosgene is a poisonous compound forms from chloroform in the presence of $UV$-rays and $O_2$ .
Reason $\left(R\right)$(R) It is used for the synthesis of precursor for the poly urethane polymer.

Consider the following statements:
$1.$ Dry ice is the solid form of ${\mathrm{CO}}_2$ .
$2.$ Dry ice is used primarily as a cooling agent.
$3.$ Water ice is colder than dry ice.

Which of the statement(s) given above is/are correct?

Study the following statements
$1$. Bromine is a reactive non-metal.
$2$. Hydrochloric acid is also called as maratic acid.
$3$. Chlorine is used in the production of phosgine, mustard gas etc.
Which of the statements above are correct?

Consider the following statements.
$1$. Chlorine is manufactured by Deacon's process.
$2$. Bromine is obtained on a commercial scale from carnallite.
$3$. Chlorine acts as bleaching agent only in the presence of moisture.
Which of the above are false?

Match List I  with List-II.
The list I                        List II
A. Teargas            $1.$ $C 1 0 H 5 C l N 2$
B. Litharge           $2.$ $PbO$
C. Red lead          $3.$ $Pb3O4$
D. Carborundum  $4.$ $SiC$

The element which liberated O₂ from water is: