What is the effect of adding gypsum to cement?
- AThe setting time of cement decreases.
- BThe setting time of cement increases.
- CThe colour of cement becomes light.
- D$A$ shining surface is obtained.
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Match items of List-$I$ with those of List-$II$ :
List-$I$ (Property) List-$II$ (Example) $a$. Diamagnetism $i$. $MnO$ $b$. Ferrimagnetism $ii$. $O_{2}$ $c$. Paramagnetism $iii$. $NaCl$ $d$. Antiferromagnetism $iv$. $Fe_{3}O_{4}$
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| $a$. Diamagnetism | $i$. $MnO$ |
| $b$. Ferrimagnetism | $ii$. $O_{2}$ |
| $c$. Paramagnetism | $iii$. $NaCl$ |
| $d$. Antiferromagnetism | $iv$. $Fe_{3}O_{4}$ |
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