Which one of the following metals cannot evolve H_2 from acids or… - Vidyadip

MCQ

Which one of the following metals cannot evolve ${H_2}$from acids or ${H_2}O$ or from its compounds

✓
$Hg$
B
$Al$
C
$Pb$
D
$Fe$

✓

Answer

Correct option: A.

$Hg$

a
(a)$Hg$ has greater reduction potential than that of ${H^ + }$and hence cannot displace hydrogen from acid.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

JEE STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

Which of the following compounds is oxidised to prepare methyl ethyl ketone

For the electrochemical cell, $Mg ( s )\left| Mg ^{2+}( aq , 1 M ) \| Cu ^{2+}( aq , 1 M )\right| Cu ( s )$ the standard emf of the cell is $2.70 V$ at $300 K$. When the concentration of $Mg ^{2+}$ is changed to $x$, the cell potential changes to $2.67 V$ at $300 K$. The value of $x$ is.

(given, $\frac{ F }{ R }=11500 K V ^{-1}$, where $F$ is the Faraday constant and $R$ is the gas constant, The value of $\ln (10)=2.30$ )

The highest possible oxidation states of uranium and plutonium, respectively, are

Which one of the following on oxidation will not give a carboxylic acid with the same number of carbon atoms

Assertion : $RCOCl, (RCO)_2O$ and $RCOOR$’ all react with Grignard reagents to form $3^o$ alcohols.
Reason : $RCOCl$ reacts with $R_2Cd$ to form ketones but $(RCO)_2O$ and $RCOOR'$ do not react at all.

You have two $C_6H_{10}O$ ketones, $I$ and $II$. Both are optically active, but $I$ is racemized by treatment with acid and $II$ is not. Wolff kishner reduction of both ketones gives the same achiral hydrocarbon, formula $C_6H_{12}$. What reasonable structures may be assigned to $I$ and $II$ respectively ?

Two salts $A _{2} X$ and $MX$ have the same value of solubility product of $4.0 \times 10^{-12}$. The ratio of their molar solubilities i.e. $\frac{S\left(A_{2} X\right)}{S(M X)}=...........$

(Round off to the Nearest Integer).

Which of the following is the best scientific method to test the presence of water in a liquid

An increase in equivalent conductance of a strong electrolyte with dilution is mainly due to

The metal-having highest melting point is