In context with beryllium,which one of the following statements is incorrect?
- AIts salts rarely hydrolyse.
- BIts hydride is electron-deficient and polymeric.
- CIt is rendered passive by nitric acid.
- DIt forms $Be_2C$.
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Similar Questions
Match the following columns and select the correct option:
Column-$I$ Column-$II$ $(a)$ Floating ribs $(i)$ Located between $2^{nd}$ and $7^{th}$ ribs $(b)$ Acromion process $(ii)$ Head of humerus $(c)$ Scapula $(iii)$ Clavicle articulation $(d)$ Glenoid cavity $(iv)$ Do not connect with the sternum
$(a)\quad(b)\quad(c)\quad(d)$
| Column-$I$ | Column-$II$ |
|---|---|
| $(a)$ Floating ribs | $(i)$ Located between $2^{nd}$ and $7^{th}$ ribs |
| $(b)$ Acromion process | $(ii)$ Head of humerus |
| $(c)$ Scapula | $(iii)$ Clavicle articulation |
| $(d)$ Glenoid cavity | $(iv)$ Do not connect with the sternum |
$(a)\quad(b)\quad(c)\quad(d)$
Name the gas that can readily decolourise acidified $KMnO_4$ solution.
Five capacitors,each of capacitance $C$,are connected as shown in the figure. The ratio of the equivalent capacitance between $P$ and $R$ to the equivalent capacitance between $P$ and $Q$ is:
If $g$ is the acceleration due to gravity on the earth's surface,the gain in the potential energy of an object of mass $m$ raised from the surface of the earth to a height equal to the radius $R$ of the earth is
$A$ glass convex lens $(\mu_g = 1.5)$ has a focal length of $8\,cm$ when placed in air. What would be the focal length of the lens when it is immersed in water $(\mu_w = 1.33)$ (in $,cm$)?
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