For the reaction A + 3B → 2C + 2D, the concentration of A changes from 0.150 M to 0.0135 M in 1 min. The rate of formation of C in mol/L/s is:
- A5 x 105
- B
3 x 10-5- ✓
5 x 10-5- D
2.5 x 10-5Answer: C.
View full solution →The IUPAC name of the compound shown below is:
- A6-bromo-2-chlorocyclohexene
- ✓3-bromo-1-chlorocyclohexene
- C2-bromo-6-chlorocyclohex-1-ene
- D1-bromo-3-chlorocyclohexene
Answer: B.
View full solution →Amide which gives propanamine by Hoffmann bromamide is:- APentanamide
- BHexanamide
- ✓Butanamine
- DPropanamine
Answer: C.
View full solution →For the reaction 3A → 2B, rate of reaction $-\frac{ d [ A ]}{ dt }$ is equal to- A$\frac{+1}{3} \frac{d[ B ]}{ dt }$
- B$\frac{+2}{3} \frac{d[ B ]}{ dt }$
- C$\frac{+1}{2} \frac{d[ B ]}{ dt }$
- ✓$\frac{+3}{2} \frac{d[ B ]}{ dt }$
Answer: D.
View full solution →Haemoglobin and chlorophyll contain:- ✓Fe and Mg
- BFe and Mn
- CFe and Co
- DMg and Fe
Answer: A.
View full solution →Assertion (A): (CH3)3C-O-CH3 gives (CH3)3C-I and CH3OH on treatment with HI.
Reason (R): The reaction occurs by SN1 mechanism.- ✓Both A and R are true and R is the correct explanation of A.
- BBoth A and R are true but R is not the correct explanation of A.
- CA is true but R is false.
- DA is false but R is true.
Answer: A.
View full solution →Assertion (A): Vitamin C cannot be stored in our body.
Reason (R): Vitamin C is fat soluble and is excreted from the body in urine.- ABoth Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
- BBoth Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
- ✓Assertion (A) is true, but Reason (R) is false.
- DAssertion (A) is false, but Reason (R) is true.
Answer: C.
View full solution →Assertion (A): Oximes are less acidic than hydroxyl amine.
Reason (R): Oximes of aldehydes and ketones show geometrical isomerism.- ABoth A and R are true and R is the correct explanation of A.
- BBoth A and R are true but R is not the correct explanation of A.
- CA is true but R is false.
- ✓A is false but R is true.
Answer: D.
View full solution →Assertion (A): Alkylbenzene is not prepared by Friedel-Crafts alkylation of benzene.
Reason (R): Alkyl halides are less reactive than acyl halides.- ABoth A and R are true and R is the correct explanation of A.
- BBoth A and R are true but R is not the correct explanation of A.
- ✓A is true but R is false.
- DA is false but R is true.
Answer: C.
View full solution →View full solution →a. Differentiate between Ideal solution and Non-ideal solution.
b. 30 g of urea is dissolved in 846 g of water. Calculate the vapour pressure of water for this solution if vapour pressure of pure water at 298 K is 23.8 mm Hg.View full solution →Write the formula of the following complexes:
i. Hexaammine platinum (IV) chloride.
ii. Dichloro tetrammine cobalt (III) ion.View full solution →Convert Toluene to m-Nitrobenzoic acid.View full solution →If the density of some lake water is 1.25 g mL-¹ and contains 92 g of Na+ ions per kg of water, calculate the molarity of Na+ ions in the lake.View full solution →Answer the following:
(a) The rate of a reaction is given by rate = k [N2O5]. In this equation what does k stand for?
(b) Is it possible to determine or predict the rate law theoretically by merely looking at the equation?View full solution →How the following conversions can be carried out?
i. 2-Bromopropane to 1-bromopropane
ii. Chloroethane to butane
iii. Benzene to diphenylView full solution →The first order rate constant for the decomposition of ethyl iodide by the reaction
C2H5I(g) → C2H4(g) + HI(g)
at 600 K is 1.60 × 10-2 s-1. Its energy of activation is 209 kJ/mol. Calculate the rate constant of the reaction at 700 Κ.View full solution →Write the chemistry of recharging the lead storage battery, highlighting all the materials that are involved during recharging.View full solution →Silver is deposited on a metallic vessel by passing a current of 0.2 amps. for 3 hrs. Calculate the weight of silver deposited. (At mass of silver = 108 amu, 1 F = 96500 C)?View full solution →How much copper is deposited on the cathode of an electrolytic cell if a current of 5 ampere is passed through a solution of copper sulphate for 45 minutes?View full solution →i. Write one chemical reaction for each
a. Carbylamine reaction
b. Acetylation reaction
ii. Write structure of N,N-ethylmethylethanamideView full solution →List various types of isomerism possible for coordination compounds, giving an example of each.View full solution →Attempt any five of the following:
(a) Aldopentoses named ribose and 2-deoxyribose are found in nucleic acids. What is their relative configuration?
(b) What are the three components of nucleic acids?
(c) Name the sugar present in milk. How many monosaccharide units are present in it? What are such oligosaccharides called?
(d) Is nucleotide and nucleoside the same? What are their roles?
(e) Why cannot vitamin C be stored in our body?
(f) During curdling of milk, what happens to sugar present in it?
(g) Account for the following:
a. There are 5-OH groups in glucose.
b. Glucose is a reducing sugarView full solution →An organic compound A with molecular formula C7H7NO reacts with Br2/aq. KOH to give compound B, which upon reaction with NaNO2 and HCl at 0°C gives C. Compound C on heating with CH3CH2OH gives a hydrocarbon D. Compound B on further reaction with Br2 water gives white precipitate of compound E. Identify the compound A, B, C, D and E; also justify your answer by giving relevant chemical equations.View full solution →Explain with two examples each of the following: Coordination entity, ligand coordination number, coordination polyhedron, homoleptic and heteroleptic.View full solution →Read the following text carefully and answer the questions that follow:
The f-block consists of elements in which 4f and 5f orbitals are progressively filled. They are placed in a separate panel at the bottom of the periodic table. The names transition metals and inner transition metals are often used to refer to the elements of d-and f-blocks respectively. The d-block occupies the large middle section of the periodic table flanked between s and p blocks in the periodic table. In general, the electronic configuration of the outer orbitals of these elements is (n-1)d1-10ns1-2. The electronic configurations of outer orbitals of Zn, Cd, Hg and Cn are represented by the general formula (n - 1)d10ns2. The transition metals and their compounds also exhibit catalytic property and paramagnetic behaviour. Transition metal also forms an alloy. An alloy is a blend of metals prepared by mixing the components. Alloys may be homogeneous solid solutions in which the atoms of one metal are distributed randomly among the atoms of the other.
i. Transition metals form alloys. Justify?
ii. Why do transition elements exhibit higher enthalpies of atomization?
iii. Transition metals and many of their compounds show paramagnetic behaviour. Give reason.View full solution →Out of pure liquid and azeotrope showing positive deviation, Which one has a higher boiling point?View full solution →Read the following text carefully and answer the questions that follow:
The solutions which boil at a constant temperature like a pure liquid and possess the same composition in liquid, as well as vapour state are called azeotropes. The components of azeotropes cannot be separated by fractional distillation. Only non-ideal solutions form azeotropes. Solutions with negative deviation form maximum boiling azeotrope and the solutions with positive deviation form minimum boiling azeotrope. The boiling point of azeotrope is never equal to the boiling points of any of the components of the azeotrope.
i. The azeotropic solutions of two miscible liquids show what type of deviation from Raoult's law?
ii. The azeotropic mixture of water & HCI boils at 108.5°C. What type of deviation is shown by the solution?
Does this solution behave as ideal or non-ideal?
iii. Do ideal solutions form azeotropes?View full solution →Transition metals and their many compounds act as good catalyst. Give reason. - B