Which of the following compounds contain(s) no covalent bond(s)? KCl, PH3, O2, B2H6, H2SO4
1) KCl, H2SO4 2) KCl 3) KCl, B2H6 4) KCl, B2H6, PH3 Answer: (2) KCl – Ionic bond between K+... View Article
Latest Posts
Which type of ‘defect’ has the presence of cations in the interstitial sites?
1) Vacancy defect 2) Frenkel defect 3) Metal deficiency defect 4) Schottky defect Answer (2) In Frenkel defect, cation is... View Article
The correct order of basicity of the following compound is :
1) (b) < (a) < (c) < (d) 2) (b) < (a) < (d) < (c) 3) (d) < (b)... View Article
According to molecular orbital theory, which of the following will not be a viable molecule?
1) He2+ 2) H2– 3) H22- 4) He22+ Answer: (3) Molecule having zero bond order will not be a viable... View Article
When metal ‘M’ is treated with NaOH, a white gelatinous precipitate ‘X’ is obtained, which is soluble in excess of NaOH. Compound ‘X’ when heated strongly gives an oxide which is used in chromatography as an adsorbent. The metal ‘M’ is
1) Ca 2) Al 3) Fe 4) Zn Answer: (2) Al2O3 is used in column chromatography.
Total number of lone pair of electrons in I3 ion is
1) 6 2) 9 3) 12 4) 3 Answer: (2) Structure of I3– Number of lone pairs in I3– is... View Article
How long (approximate) should water be electrolysed by passing through 100 amperes current so that the oxygen released can completely burn 27.66 g of diborane? (Atomic weight of B = 10.8 u)
1) 0.8 hours 2) 3.2 hours 3) 1.6 hours 4) 6.4 hours Answer: (2) B2H6 +3O2 -> B2O3 +3H2O 27.66... View Article
The compound that does not produce nitrogen gas by the thermal decomposition is
1) (NH4)2Cr2O7 2) NH4NO2 3) (NH4)2SO4 4) Ba(N3)2 Answer: (3) Among all the given compounds, only (NH4)2SO4 do not form... View Article
The combustion of benzene (l) gives CO2(g) and H2O (l). Given that heat of combustion of benzene at constant volume is -3263.9 kJ mol -1 at 250C ; heat of combustion (in kJ/mol) of benzene at constant pressure will be (R = 8.314 JK-1 mol-1)
1) -452.46 2) 3260 3) -3267.6 4) 4152.6 Answer: (3) C6H6 (l) + (15/2)O2 (g) -> 6CO2 (g) + 3H2O... View Article
An aqueous solution contain 0.10 M H2S and 0.20 M HCl. If the equilibrium constant for the formation of HS– from H2S is 1.0×10-7 and that of S2- from HS– ions is 1.2×10-13 then the concentration of S2- ions in aqueous solution is
1) 3×10-20 2) 6×10-21 3) 5×10-19 4) 5×10-8 Answer: (1) \(\begin{array}{l}H_{2}S\rightleftharpoons 2H^{+}+S^{2-}\end{array} \) Ka1.Ka2 = Keq \(\begin{array}{l}\frac{{[H^{+}]^{2}[S^{2-}]}}{[H_{2}S]} = 1\times 10^{-7}\times... View Article
An alkali is titrated against an acid with methyl orange as indicator, which of the following is a correct combination?
Base Acid End point 1. Strong Strong Pinkish red to yellow 2. Weak Strong Yellow to Pinkish red 3. Strong... View Article
Which of the following are Lewis acids?
1) AlCl3 and SiCl4 2) PH3 and SiCl4 3) BCl3 and AlCl3 4) PH3 and BCl3 Answer: (3) BCl3 –... View Article
Which of the following compounds will be suitable for Kjeldahl’s method for nitrogen estimation?
Answer: (1) Kjeldahl method is not applicable for compounds containing nitrogen in nitro, and azo groups and nitrogen in ring,... View Article
Which of the following salts is the most basic in aqueous solution?
1) CH3COOK 2) FeCl3 3) Pb(CH3COO)2 4) Al(CN)3 Answer: (1) CH3COOK + H2O -> CH3COOH + KOH (basic) FeCl3 –... View Article
[latex]Fe{{C}_{2}}{{O}_{4}},F{{e}_{2}}{{({{C}_{2}}{{O}_{4}})}_{3}},FeS{{O}_{4}},F{{e}_{2}}{{(S{{O}_{4}})}_{3}}[/latex] one mole each, will react with how many moles of [latex]KMn{{O}_{4}}[/latex]
a.1 b.2 c.3 d.5 Answer: (b) \(\begin{array}{l}Fe{{C}_{2}}{{O}_{4}}+KMn{{O}_{4}} \end{array} \)→\(\begin{array}{l} {{}}F{{e}^{3+}}+C{{o}_{2}}+M{{n}^{2+}}\end{array} \) \(\begin{array}{l}F{{e}_{2}}{{\left( {{C}_{2}}{{O}_{4}} \right)}_{3}}+MnO_{4}^{-}\end{array} \) → \(\begin{array}{l}{{}}F{{e}^{3+}}\end{array} \) \(\begin{array}{l}F{{e}_{3}}{{O}_{4}}\end{array} \)... View Article
Three mole of Ag is heated from 300 K to 1000 K. Calculate ΔH when P = 1 atm and CP = 23 + 0.01 T.
a. 62 kJ/mol b. 45 kJ/mol c. 38 kJ/mol d. 54 kJ/mol Answer: (a) \(\begin{array}{l}\Delta H=\int\limits_{{{T}_{1}}}^{{{T}_{2}}}{n\,CpdT}\end{array} \) \(\begin{array}{l}n\int\limits_{30}^{400}{\left( 23+0.1T \right)dT}\end{array}... View Article
In isoelectronic species [latex]C{{l}^{-}},Ar,C{{a}^{2+}}[/latex] size differ due to
a.Nuclear charge b.Electronic – electronic repulsion in valence shell c.Magnetic quantum number d.Principal quantum number Answer: (a) In isoelectronic species,... View Article
Assertion: Ozone is getting depleted due to CFCs. Reason: With the deplection of ozone layer more UV radiation filters into troposphere
a. Both Assertion and Reason are true and Reason is the correct explanation of Assertion. b. Both Assertion and Reason... View Article
What will the order of magnetic moment (μ) be
Given complexes are low spin complexes, \(\begin{array}{l}{{[V{{(CN)}_{6}}]}^{4-}}\end{array} \) \(\begin{array}{l}{{[Cr{{(N{{H}_{3}})}_{6}}]}^{2+}}\end{array} \) \(\begin{array}{l}{{[Ru{{(N{{H}_{3}})}_{6}}]}^{3+}}\end{array} \) \(\begin{array}{l}{{[Fe{{(CN)}_{6}}]}^{4-}}\end{array} \) Then order of magnetic moment (μ)... View Article
For [latex]Z{{r}_{3}}{{(P{{O}_{4}})}_{4}}[/latex] the solubility product is Ksp and solubility is S. Find the correct relation.
a. \(\begin{array}{l}S={{\left( \frac{{{K}_{sp}}}{6912} \right)}^{1/7}}\end{array} \) b. \(\begin{array}{l}S={{\left( \frac{{{K}_{sp}}}{216} \right)}^{1/7}}\end{array} \) c. \(\begin{array}{l}S={{\left( \frac{{{K}_{sp}}}{216} \right)}^{1/8}}\end{array} \) d. \(\begin{array}{l}S={{\left( \frac{{{K}_{sp}}}{912} \right)}^{1/3}}\end{array} \)... View Article
