The pH values of 0.1 M solution of HCl, CH3COOH, NH4Cl and CH3COONa will have the order
HCl <CH3COOH < NH4Cl <CH3COONa
CH3COONa <NH4Cl<CH3COOH <HCl
NH4Cl <CH3COONa <CH3COOH <HCl
All will have same pH value
A.
HCl <CH3COOH < NH4Cl <CH3COONa
Strong acids have low pH value while strong bases have high pH value. Hence, the order of pH is
HCl <CH3COOH < NH4Cl <CH3COONa
Strong acid < weak acid < salt of weak base and strong acid< salt of weak acid and strong base
For the titration of solution of oxalic acid and sodium hydroxide, the suitable indicator is
phenolphthalein
methyl orange
any of these
None of these
C2H2 + → 2CO2 + H2O ; ΔH = -310 Kcal
C + O2 → CO2 ; ΔH = -94 Kcal
H2 + → H2O ; ΔH = -68 Kcal
On the basis of the above equations, ΔHf (enthalpy of formation) of C2H2 ,will be
-148 Kcal
+54 Kcal
-54 Kcal
+80 Kcal
I2(s) I2(g) ΔH= + 40Kcal, ΔS= 80cal. The sublimation point of I2(s) will be
100°C
127°C
227°C
500°C
In which of the following pairs both molecules do not possess same type of hybridisation?
CH4 and H2O
PCl5 and SF4
SF6 and XeF4
BCl3 and NCl3
If H-X bond length is 2.00 Å. and H-X bond has dipole moment 5.12 x 10-30 C-m, the percentage of ionic character in the molecule will be
100%
16%
18%
20%
(i) H—C—H angle in CH4
(ii) Cl—B—Cl angle in BCl3
(iii) F—I—F angle in IF7 in a plane
(iv) I—I—I angle in I
Increasing order of above bond angles is
(i) < (ii)< (iii)< (iv)
(ii)< (i) < (iii)< (iv)
(iii)< (i)< (ii)< (iv)
(iv)< (ii) < (i) < (iii)
An organic alkadiene on reductive ozonolysis produces
(i) acetaldehyde
(ii) acetone
(iii) 2-methylpropane-1,3-dial
The formula of alkadiene will be
CH3C(CH3)=CHCH(CH3)CH=CHCH3
CH3CH(CH3)CH=C(CH3)CH=CHCH3
CH3C(CH3)=CHCHC(CH3)=CHCH3
CH3CH2CH(CH3)CH=CHC(CH3)=CH2