MCQ
Artificial smoke screens are made by
- AAluminium oxide
- BLead oxide
- CSodium oxide
- ✓Titanium oxide
✓
Answer
Correct option: D.
Titanium oxide
d
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
Chlorobenzene is prepared commercially by
The molarity of $20\% \,(W/W)$ solution of sulphuric acid is $2.55\, M$. The density of the solution is ........... $g \,cm^{-3}$.
→Major product $\mathrm{B}$ of the following reaction has . . . . . . .$\pi$-bond.
→Indicate the organic structure for the product expected when $2-$methyl propene is heated with acetyl chloride in presence of anhydrous zinc chloride
→The heat evolved in the combustion of methane is given by the following equation
→$C{H_4}(g) + 2{O_2}(g) \to C{O_2}(g) + 2{H_ {2}}O(l);$
$\Delta H = - 890.3\,kJ$
How many grams of methane would be required to produce $445.15\, kJ$ of heat of combustion.....$g$
$'A'$ and $'B'$ respectively are:
→$A \xrightarrow[\left( 2 \right)Zn-{{H}_{2}}O]{\left( 1 \right){{O}_{3}}}$ Ethane$-1,2-$dicarbaldehyde $+$ Glyoxal$/$Oxaldehyde
$B \xrightarrow[\left( 2 \right)Zn-{{H}_{2}}O]{\left( 1 \right){{O}_{3}}} 5-$oxohexanal
$pH$ of completely dissociated $0.005\,M\,{H_2}S{O_4}$ is
→The incorrect postulates of the Dalton's atomic theory are :
→$(A)$ Atoms of different elements differ in mass.
$(B)$ Matter consists of divisible atoms.
$(C)$ Compounds are formed when atoms of different element combine in a fixed ratio.
$(D)$ All the atoms of given element have different properties including mass.
$(E)$ Chemical reactions involve reorganisation of atoms.
Choose the correct answer from the options given below :
The incorrect order of boiling point is
Ammonia forms the complex $[Cu(NH)_3)_4]^{2+}$ with copper ions in alkaline solution but not in acidic solution. the reason for this is
→