MCQ
Which has valency two
- A$Al$
- B$Rb$
- ✓$Cu$
- D$Ge$
✓
Answer
Correct option: C.
$Cu$
c
All has a valency $3$ .$Rb$ has valency $1$.$Cu$ has valency $2$ .$Ge$ has valency $4.$
All has a valency $3$ .$Rb$ has valency $1$.$Cu$ has valency $2$ .$Ge$ has valency $4.$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Which of the following reactants on reaction with conc. $\mathrm{NaOH}$ followed by acidification gives the following lactone as the only product?
→$10$ moles of an ideal gas confined to a volume of $10\,L$ is released into atmosphere at $300\, K$ where the pressure is $1\, bar.$ The work done by the gas is ....$L\, bar$
→$(R = 0.083\, L\, bar\, K^{-1} \,mol^{-1})$
Two aliphatic aldehydes $\mathrm{P}$ and $\mathrm{Q}$ react in the presence of aqueous $\mathrm{K}_2 \mathrm{CO}_3$ to give compound $\mathrm{R}$, which upon treatment with $\mathrm{HCN}$ provides compound $\mathrm{S}$. On acidification and heating, $\mathrm{S}$ gives the product shown below: $Image$
→$1.$ The compounds $\mathrm{P}$ and $\mathrm{Q}$ respectively are
MCQ $Image$
$2.$ The compound $R$ is
MCQ $Image$
$3.$ The compound $\mathrm{S}$ is
MCQ $Image$
Give the answer question $1,2$ and $3.$
Which of the following statements about the interstitial compounds is incorrect?
Incorrect statement is :
Migratory aptitude of the following in decreasing order is
On introducing a catalyst at $500\,K,$ the rate constant of a first order reaction increases $2.718$ times. If the activation energy in the presence of a catalyst is $4.15\, kJ\, mol^{-1}.$ Then what will be $E_a$ in absence of catalyst (value of $e = 2.718$ ) ......... $kJ$
→In a first order reaction $A \to B,$ if $k$ is rate constant and initial concentration of the reactant $A$ is $0.5\,M$ then the half-life is
→Given below are two statements :
Statement (I): It is impossible to specify simultaneously with arbitrary precision, both the linear momentum and the position of a particle.
Statement (II) : If the uncertainty in the measurement of position and uncertainty in measurement of momentum are equal for an electron, then the uncertainty in the measurement of velocity is $\geq \sqrt{\frac{h}{\pi}} \times \frac{1}{2 m}$.
In the light of the above statements, choose the correct answer from the options given below :
→Statement (I): It is impossible to specify simultaneously with arbitrary precision, both the linear momentum and the position of a particle.
Statement (II) : If the uncertainty in the measurement of position and uncertainty in measurement of momentum are equal for an electron, then the uncertainty in the measurement of velocity is $\geq \sqrt{\frac{h}{\pi}} \times \frac{1}{2 m}$.
In the light of the above statements, choose the correct answer from the options given below :
The solubility product of $AgCl$ is $1.8 \times 10^{-10}$.Precipitation of $AgCl$ will occur by mixing which of the following solutions when mixed in equal volume ?
→