Download App

STD 12 - 4. d and f- block elements — JEE STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceJEESTD 12 - 4. d and f- block elements4 Marks
MCQ
Which of the following statement is Correct
  • A
    $Ce^{+4}$ act as oxidising as well as reducing agent
  • B
    Pure $PH_3$ is produced by heating of $PH_4I$ with dil. $CH_3COOH$
  • C
    Urea, sulphamic acid and thiourea are used to destroy nitrate ion
  • ✓
    Titration of boric acid solution is not satisfactory with $NaOH$ solution
✓

Answer

Correct option: D.
Titration of boric acid solution is not satisfactory with $NaOH$ solution
d

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

Find the value of $\frac {P}{k_p}$ for reaction at a certain temperature is :-

$2NOBr(g)\,\,\rightleftharpoons  \,\,2NO(g)\,\,+\,\,Br_2(g),$  where $P$  is the total pressure of gases at equilibrium and $P_{Br_2}\,\,=\,\,\frac {P}{9}$

→
A natural product was isolated in the laboratory and its observed rotation was $+10^o$. When meausured in a $1\,\, dm$ sample tube containing $1\, gm$ of compoud in $10\, ml$ of water. What is the specific rotation of this compound.
→
The alcohol which does not give a stable compound on dehydration is
→
Give the correct order of electrical conductivity of aqueous solution of following complexes 
$(A)\, [Pt(NH_3)_6]Cl_4 \,\,\,\,\,\,\,\,\,\,\, (B)\, [Cr(NH_3)_6]Cl_3$
$(C)\, [Co(NH_3)_4Cl_2]\, Cl \,\,\,\,\,(D)\, K_2[PtCl_6]$
→
Total number of stereo isomers possible for the given structure:

 Image 
→
$EMF$ of following concentration cell will be ............. $\mathrm{V}$

 ${\text{C}}{{\text{l}}_2}\,{\text{(1}}\,{\text{atm) |}}\,{\text{C}}{{\text{l}}^ - }\,{\text{(1}}\,\,{\text{M)}}\,{\text{|| C}}{{\text{l}}^ - }\,(0.1\,M)\,|\,C{l_2}\,(2\,atm)$

→
An element $(A)$ occurs in the short period having electronic configuration $ns^2\,np^1$. The formula of its oxide will be
→
Consider the following groups :

$(I)$ $-OAc$                        $(II)$ $-OMe$

$(III)$ $-O-SO_2-Me$          $(IV)$ $-O-SO_2-CF_3$

The order of leaving power is :

→
In the Arrhenius equation, $k = A{e^{ - Ea/RT}}$, the Arrhenius constant $A$ will be equal to the rate constant when

$(A)$ $E_a = 0$

$(B)$ $T$ $=$ $\infty $

$(C)$ $T = 0$

$(D)$ $E_a$ $=$ $\infty $

→
Which complex is most stable ?

Where $kd =$ Dissociation constant

→