Download App

STD 11 -p-Block elements - I — JEE STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceJEESTD 11 -p-Block elements - I4 Marks
MCQ
What is not true about borax ?
  • A
    Molecular formula is $Na_2B_4O_7.10H_2O$
  • B
    Crystalline borax also contains tetra nuclear unit
  • ✓
    It hydrolyses to give an acidic solution
  • D
    White crystalline solid
✓

Answer

Correct option: C.
It hydrolyses to give an acidic solution
c
$N{a_2}{B_4}{O_7}.10{H_2}O\,\,\overset{HOH}{\rightarrow}\,\mathop {NaOH\,}\limits_{SB}  + \,\mathop {{H_3}B{O_3}}\limits_{WA} $

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

Explore more

JEE STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

The total number of electron that takes part in forming bonds in ${N_2}$ is
→
The reaction of sodium acetate with acetyl chloride proceeds through which of the  following mechanisms ?
→
Cyanide and isocyanide are isomers of type
→
Given below are two statements :
Statement I : In Lassaigne's test, the covalent organic molecules are transformed into ionic compounds.
Statement II : The sodium fusion extract of an organic compound having N and S gives prussian blue colour with $FeSO _4$ and $Na _4\left[ Fe ( CN )_6\right]$In the light of the above statements, choose the correct answer from the options given below
→
What mass of $AgI$ will dissolve in $1.0\, L$ of its saturated solution ? [Given $: K_{sp}(AgI) = 1.0\times10^{-16} ; (At\, wt.\, Ag = 108; I=127)$
→
Under isothermal and reversible conditions, the term "free energy" in thermodynamics signifies
→
Correct match is

                Complexes       No. of unpaired electron
  $A$           $[CrF_6]^{-4}$  $P$       $5$
  $B$           $[MnF_6]^{-4}$  $Q$        $2$
  $C$           $[Cr(CN)_6]^{-4}$  $R$       $1$
  $D$           $[Mn(CN)_6]^{-4}$  $S$       $4$

 

→
Which of the following is a normal element
→
Which one of the following arrangements represents the correct order of least negative to most negative electron gain enthalpy for $C, Ca, Al, F$ and $O$ ?
→
The element or elements whose position is anomalous in the periodic table is
→