MCQ
Electromagnetic radiation with maximum wavelength is
- AUltraviolet
- ✓Radio wave
- C$X$ ray
- DInfra red
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
|
List $I$ (Anion) |
List $II$ $($Gas evolved on reaction with dil $H _{2} SO _{4})$ |
| $A.$ $CO _{3}^{2-}$ | $I.$ Colourless gas which turns lead acetate paper black |
| $B.$ $S^{2-}$ | $II.$ Colourless gas which turns acidified potassium dichromate solution green. |
| $C.$ $SO_{3}{ }^{2-}$ | $III.$ Brown fumes which turns acidified KI solution containing starch blue. |
| $D.$ $NO _{2}^{-}$ | $IV.$ Colourless gas evolved with brisk effervescence, which turns lime water milky. |
Choose the correct answer from the options given below
$N_2H_5 ^+ + NH_3$ $\rightleftharpoons $ $NH_4^+ + N_2H_4$
$NH_3 + HBr $ $\rightleftharpoons $ $NH_4^+ + Br^-$
$N_2H_4 + HBr$ $\rightleftharpoons $ $N_2H_5^+ + Br^-$
Based on this information, what is the order of acidic strength -
$U\,\,\, 1s^2 \,2s^2 \,2p^3$
$V\,\,\, 1s^2\,2s^2 \,2p^6 \,3s^1$
$W\,\,\, 1s^2\,2s^2\, 2p^6\,3s^2\,3p^2$
$X\,\,\, 1s^2\,2s^2\,2p^6\,3s^2\,3p^6\,3d^5\, 4s^2$
$Y\,\,\, 1s^2\, 2s^2\,2p^6\,3s^2\,3p^6\,3d^{10}\, 4s^2\, 4p^6$
Determine which sequence of elements satisfy the following statements :
$(i)$ Element forms a carbonate which is not decomposed by heating
$(ii)$ Element is most likely to form coloured ionic compounds
$(iii)$ Element has largest atomic radius
$(iv)$ Element forms only acidic oxide