What is common between P4O6 and P4O10?
A. sp3 hybridized B. p – o – p bond C. Acidic Oxide D. All of these Solution: (D) The... View Article
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The unit cell of aluminium is a cube with an edge length of 405 pm. The density of aluminium is 2.70 g cm−3. What is the structure of the unit cell of aluminium
A. Body-centered cubic cell B. Face-centred cubic cell C. End-centered cubic cell D. Simple cubic cell Solution: (B) Density of... View Article
In Kjeldahl’s method, ammonia from 5 g of good neutralizes 30 cm2 of 0.1 N acid. The percentage of nitrogen in the food is
A. 0.84 B. 8.4 C. 16.8 D. 1.68 Solution: (A) From Kjeldahl’s method, the percentage of nitrogen = 1.0 ×... View Article
1 M NaOH solution was slowly added into 1000 mL of 183.75 g impure H2SO4 solution and the following plot was obtained
A. 75%, −⅓ B. 80%, −½ C. 80%, −1 D. None of these Solution: (C) Let us do the calculation... View Article
Which one of the following groupings represents a collection of isoelectronic species? (At. nos.: Cs = 55, Br = 35)
A. Na+, Ca2+, Mg2+ B. N3–, F–, Na+ C. Be, Al3+, Cl– D. Ca2+, Cs+, Br. Solution: (B) If we... View Article
The correct IUPAC name of BR is
A. 7-Bromo-2Z, 5E-Heptadiene B. 1-Bromo-2Z, 5E-Heptadiene C. 1-Bromo-2Z, 5Z-Heptadiene D. 1-Bromo-2E, 5Z-Heptadiene Solution: (D) The correct name is 1-Bromo-2E, 5Z-Heptadiene.
The litmus solution when shaken with charcoal becomes colourless. Explain
Solution: If we take a solution of acetic acid in water and shake it in the presence of charcoal, a... View Article
Volume of O2 liberated at STP by 100 ml of 10 volume H2O2 solution is
Solution: (1000) Given, Volume of H2O2 = 100 ml Volume strength of H2O2 = 10 volume We can calculate the... View Article
The pressure of sodium vapour in a 1.0 L container is 10 torr at 1000 oC. How many atoms are in the container
A. 9.7 × 1017 B. 7.6 × 1019 C. 4.2 × 1017 D. 9.7 × 1019 Solution: (B) 10 torr... View Article
The precipitate of Ag2CrO4 (Ksp = 1.9 x 10-12) is obtained when equal volumes of the following are mixed
A. 10-4 MAg+ + 10-4 MCrO42- B. 10-2 MAg+ + 10-5 MCrO42- C. 10-5 MAg+ + 10-3 MCrO42- D. 10-4... View Article
Bond order normally gives an idea of the stability of a molecular species. All the molecules viz. H2, Li2 and B2 have the same bond order yet they are not equally stable. Their stability order is:
A. H2 > B2 > Li2 B. H2 > Li2 > B2 C. Li2 > B2 > H2 D. B2... View Article
Which of the following is not antibacterial?
A. Prontosil B. Salvarsan C. Sulphanilamide D. Lansoprazole Solution: (D) Lansoprazole is a medication that reduces stomach acid and is... View Article
Which of the following statement describes correctly the bonding in Mn2(CO)10?
A. It has some CO as bridging ligands B. EAN is 35 C. Mn-Mn bond is present in this molecule... View Article
In the following compounds, the least number of monochlorination is possible in?
Solution: (D) The least number of monochlorination is possible in compound D and it will give only one type of... View Article
The actual geometry of NO2- is
A. Planar B. Linear C. V-shape D. Tetrahedral Solution: (C) Let us look at the shape or geometry of NO2–... View Article
The linear structure is assumed by
SnCl2 NCO- NO2+ CS2 Solution: (B, C and D) NCO-, NO2+ and CS2 have linear structures. On the other hand,... View Article
In BrF3 molecule, the lone pairs occupy equatorial positions to minimize
A. Lone pair-bond pair repulsion only B. Bond pair-bond pair repulsion only C. Lone pair – lone pair repulsion and... View Article
100 mL of PH3 on heating forms P and H2. The volume change in the reaction is
A. An increase of 50 mL B. An increase of 100 mL C. An increase of 150 ml D. A... View Article
Calculate the solubility of A2X3 in pure water, assuming that neither kind of ion reacts with water
Solution: (1.0 ×10−5 mol/L) A2X3 ⟶ 2A3+ + 3X−2 Ksp = [A3+]2[X2−]3 Let solubility of A2X3 be S ∴ Ksp... View Article
A cylinder contains 20n kg of N2 gas (M = 28kgk−1mol−1) at a pressure of 5 atm. The mass of hydrogen (M = 2kgk−1mol−1) at a pressure of 3 atm contained in the same cylinder at the same temperature is
A. 1.08 kg B. 0.86 kg C. 0.68 kg D. 1.68 kg Solution: (B) V / T = nR /... View Article
