MCQ
Cathode rays are made up of
  • A
    Positively charged particles
  • Negatively charged particles
  • C
    Neutral particles
  • D
    None of these

Answer

Correct option: B.
Negatively charged particles
b
(b) Cathode rays are made up of negatively charged particles (electrons, ${e^ - }$)

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

Similar questions

Boron forms $\text{BX3}$​ type of halides. The correct decreasing order of Lewis$-$acid strength of these halides is:
Which is correctly matched ?
When $100 \ mL$ of $1.0 \ M \ HCl$ was mixed with $100 \ mL$ of $1.0 \ M \ NaOH$ in an insulated beaker at constant pressure, a temperature increase of $5.7^{\circ} C$ was measured for the beaker and its contents (Expt. $1$). Because the enthalpy of neutralization of a strong acid with a strong base is a constant $\left(-57.0 \ kJ \ mol ^{-1}\right)$, this experiment could be used to measure the calorimeter constant. In a second experiment (Expt. $2$), $100 \ mL$ of $2.0 \ M$ acetic acid $\left(K_a=2.0 \times 10^{-5}\right)$ was mixed with $100 \ mL$ of $1.0 M \ NaOH$ (under identical conditions to Expt. $1$) where a temperature rise of $5.6^{\circ} C$ was measured.

(Consider heat capacity of all solutions as $4.2 J g ^{-1} K ^{-1}$ and density of all solutions as $1.0 \ g mL ^{-1}$ )

$1.$ Enthalpy of dissociation (in $kJ mol ^{-1}$ ) of acetic acid obtained from the Expt. $2$ is

$(A)$ $1.0$ $(B)$ $10.0$ $(C)$ $24.5$ $(D)$ $51.4$

$2.$ The $pH$ of the solution after Expt. $2$ is

$(A)$ $2.8$ $(B)$ $4.7$ $(C)$ $5.0$ $(D)$ $7.0$

Give the answer question $1$ and $2.$

Which one of the following cannot be prepared by Wurtz reaction ?
Among the following the pair in which the two species are not isostructural is
The required amount of $KBr$ (molar mass $= 119$) in gram to start the precipitation of $AgBr$ in $500\, mL$ solution of $0.05\, M\, AgNO_3$ will be  ($K_{SP}$ of $AgBr = 5 \times 10^{-13}$)
The dipole moment of $o, p$ and $m-$ dichlorobenzene will be in the order
The $\Delta S$ for the vaporisation of $1$ $mol$ of water is $88.3 $ $J/mole\, K$ . The value of $\Delta S$ for the condensation of $1 $ $mol$ of vapour will be.......$ J/mol\, K$
Incorrect statement
The solution of $N{a_2}C{O_3}$ has $pH$