MCQ
Choose the typical element
- A$K$
- ✓$Na$
- C$Sc$
- D$He$
✓
Answer
Correct option: B.
$Na$
b
$(b)$ In third group $Na$ is a typical element.
$(b)$ In third group $Na$ is a typical element.
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
The ratio of number of oxygen atoms $(O)$ in $16.0\,g$ ozone $(O_3),\,28.0\,g$ carbon monoxide $(CO)$ and $16.0$ oxygen $(O_2)$ is (Atomic mass $: C = 12, O = 16$ and Avogadro' s constant $N_A = 6.0 \times 10^{23}\,mol^{- 1}$ )
→$1.12\, ml$ of a gas is produced at $STP$ by the action of $4.12\, mg$ of alcohol, with methyl magnesium iodide. The molecular mass of alcohol is
→The ionic radii (in $\mathop A\limits^o $) of $N^{3-} , O^{2-}$ and $F^-$ are respectively :
→The ratio of equivalent weights of $C_2H_5OH$ in the following reactions is
→$(i) C_2H_5OH \longrightarrow CH_3CHO$
$(ii) C_2H_5OH \longrightarrow C_2H_5ONa$
In photography sodium thiosulphate is used as
What is the slope of graph plotted between half-life $(t_{1/2})$ and initial concentration $(a)$ for a $I^{st}$ order reaction
→The number of endothermic process/es from the following is
→$A.$ $I _2( g ) \rightarrow 2 I ( g )$
$B.$ $HCl ( g ) \rightarrow H ( g )+ Cl ( g )$
$C.$ $H _2 O ( l ) \rightarrow H _2 O ( g )$
$D.$ $C ( s )+ O _2( g ) \rightarrow CO _2( g )$
$E.$ Dissolution of ammonium chloride in water
Concentrated aqueous sulphuric acid is $98\%\,\, H_2SO_4$ by mass and has a density of $1.80\, g\, mL^{-1}.$ Volume of acid required to make one litre of $0.1\, M \,H_2SO_4$ solution is ........ $mL$.
→The correct order of equivalent conductance of $LiCl, NaCl$ and $KCl$ at infinite dilution is
→$A$ is
→