Product A in the below chemical reaction is:
Product “A” in the below chemical reaction is: Answer: (d) hence the answer is d
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A central atom in a molecule has two lone pairs of electrons
A central atom in a molecule has two lone pairs of electrons and forms three single bonds. The shape of... View Article
What is the spin-only magnetic moment value (BM) of a divalent metal ion with atomic number 25, in its aqueous solution?
What is the spin-only magnetic moment value (BM) of a divalent metal ion with atomic number 25, in its aqueous... View Article
Mesityl oxide is a common name of:
Mesityl oxide is a common name of: a. 3-Methyl cyclohexane carbaldehyde b. 4-Methyl pent-3-en-2-one c. 2,4-Dimethyl pentan-3-one d. 2-Methyl cyclohexanone... View Article
Given below are two statements:
Given below are two statements: Statement I: Retardation factor (Rf) can be measured in meter/centimetre Statement II: Rf value of... View Article
Which of the following is the correct structure of tyrosine?
Which of the following is the correct structure of tyrosine? Answer: (c) Fact.
Given below are two statements:
Given below are two statements: Statement I: Potassium permanganate on heating at 573 K forms potassium manganate. Statement II: Both... View Article
The INCORRECT statement(s) about heavy water is (are)
The INCORRECT statement(s) about heavy water is (are) (A) Used as a moderator in a nuclear reactor (B) Obtained as... View Article
At 363 K, the vapour pressure of A is 21 kPa and that of B is 18 kPa. One mole of A and 2 moles of B are mixed. Assuming that this solution is ideal, the vapour pressure of the mixture is _______ kPa. (Round off to the nearest integer).
Answer: 19 \(\begin{array}{l}X_{A} = \frac{1}{1+2} = \frac{1}{3}\end{array} \) \(\begin{array}{l}X_{A} = \frac{2}{3}\end{array} \) POA = 21 kPa POB = 18 kPa... View Article
When 35 mL of 0.15 M lead nitrate solution is mixed with 20 mL of 0.12 M chromic sulphate solution, _________ × 10–5 moles of lead sulphate precipitate out. (Round off to the nearest integer)
Answer: 525 3Pb(NO3)2 + Cr2(SO4)3 35 ml 20 ml 0.15 M 0.12 M = 5.25 mmol = 2.4 mmol 3PbSO4... View Article
Ga (atomic mass 70 u) crystallizes in a hexagonal close packed structure. The total number of voids in 0.581 g of Ga is ________ × 1021. (Round off to the nearest integer). [Given: NA = 6.023 × 1023]
Answer: 15 No. of moles of Ga = 0.581 / 70 No. of atoms of Ga = 0.581 / 70... View Article
In Duma’s method of estimation of nitrogen
In Duma’s method of estimation of nitrogen, 0.1840 g of an organic compound gave 30 mL of nitrogen collected at... View Article
Sulphurous acid (H2SO3)
Sulphurous acid (H2SO3) has Ka1 = 1.7 × 10–2 and Ka2 = 6.4 × 10–8. The pH of 0.588 M... View Article
[Ti(H2O)6]3+ absorbs light of wavelength 498 nm during a d–d transition. The octahedral splitting energy for the above complex is ___________ × 10–19 J. (Round off to the nearest integer). h = 6.626 × 10–34 Js; c = 3 × 108 ms–1.
Answer: 4 \(\begin{array}{l}\Delta _{o} = \frac{hc}{I_{abs}} = \frac{6.626\times10^{-34} \times3 \times10^{8} }{498\times10^{-9} }\end{array} \) \(\begin{array}{l}= \frac{6.626\times3}{498}\times 10^{-17} = 3.99 \times 10^{-19}\end{array}... View Article
A and B decompose via first-order kinetics
A and B decompose via first-order kinetics with half-lives 54.0 min and 18.0 min respectively. Starting from an equimolar non-reactive... View Article
The number of orbitals with n = 5
The number of orbitals with n = 5, m1 = +2 is ___________. (Round off to the nearest integer). Answer:... View Article
A 5.0 m mold m–3 aqueous solution of KCl
A 5.0 m mold m–3 aqueous solution of KCl has a conductance of 0.55 mS when measured in a cell... View Article
At 25°C, 50 g of iron reacts with HCl
At 25°C, 50 g of iron reacts with HCl to form FeCl2. The evolved hydrogen gas expands against a constant... View Article
The secondary structure of protein is stabilized by:
a. van der Waals forces b. Peptide bond c. Hydrogen bonding d. Glycosidic bond Answer: (c) The secondary structure of... View Article
Fex2 and Fey3 are known when x and y are:
a. x=Cl, Br, I and y=F, Cl, Br, I b. x=F, Cl, Br, I and y=F, Cl, Br c. x=F,... View Article
