Which of the following compounds is useful as a fertilizer?
- A$CaC_2$
- B$NaAlO_2$
- C$Ca(H_2PO_4)_2 \cdot H_2O + CaSO_4$
- DAll of the above
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Calcium cyanamide on treatment with steam produces:
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Reason : $s-$Block elements are highly electropositive in nature.
Reason : $s-$Block elements are highly electropositive in nature.
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View SolutionAssertion : $Al(OH)_3$ is insoluble in $NH_4OH$ but soluble in $NaOH$.
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Reason : $NaOH$ is a strong alkali.
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View SolutionIdentify the correct statements from the following:
$I$. $LiF$ is less soluble in water than $NaF$
$II$. Both $LiCl$ and $MgCl_2$ are insoluble in ethanol
$III$. Both $Li$ and $Mg$ form nitrides
$IV$. $Na_2CO_3$ gives $CO_2$ on heating
$I$. $LiF$ is less soluble in water than $NaF$
$II$. Both $LiCl$ and $MgCl_2$ are insoluble in ethanol
$III$. Both $Li$ and $Mg$ form nitrides
$IV$. $Na_2CO_3$ gives $CO_2$ on heating
Match column-$I$ with column-$II$ :
column-$I$ column-$II$ $a$. $Ra$ $p$. Aeroplane industry $b$. $K$ $q$. Down cell $c$. $Li$ $r$. Photo electric cell $d$. $Na$ $s$. Radioactive
| column-$I$ | column-$II$ |
| $a$. $Ra$ | $p$. Aeroplane industry |
| $b$. $K$ | $q$. Down cell |
| $c$. $Li$ | $r$. Photo electric cell |
| $d$. $Na$ | $s$. Radioactive |
Medium
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