Pyridine reacts with a mixture of KNO3 and H2SO4 at 300°C to give (a) 1-Nitropyridine (b) 2-Nitropyridine (c) 3-Nitropyridine (d) 4-Nitropyridine

Pyridine reacts with a mixture of KNO3 and H2SO4 at 300°C to give
(a) 1-Nitropyridine
(b) 2-Nitropyridine
(c) 3-Nitropyridine
(d) 4-Nitropyridine
by

1 Answer

Answer :

3-Nitropyridine
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Benzene reacts with propene in the presence of H2SO4 catalyst to give (a) n-Propylbenzene (b) Benzophenone (c) Cumene (d) Nothing happens

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Last Answer : Electrophilic substitution

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Which of the following is not used as a medium for high temperature heating ? (A) Dowtherm (B) Mercury (C) Liquid metal (e.g. molten sodium) (D) Fused salts (e.g., an eutectic mixture of 53% KNO3 , 40% NaNO2and 7% NaNO3 )

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Inside the ____ is a gas generator containing a mixture of NaN3 (Sodium Azide), KNO3 (Potassium Nitrate) and SiO2 (Silicon Dioxide). When the undesired event happens, an electric circuit is turned on by a sensor, and a series of chemical reactions generate nitrogen gas that fills ____ in 20 to 30 milliseconds. Fill up the blank

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A compound, C4H6, reacts with bromine and forms a white precipitate with ammoniacal silver nitrate solution. It reacts with dilute H2SO4 in the presence of mercuric sulfate to form 2-butanone. The compound could be (a) 1-Butyne (b) 1-Butene (c) 2-Butyne (d) 2-Butene

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Which of the following statements is false about toluene? (a) can be prepared by treating benzene with methyl chloride in the presence of AlCl3. (b) is converted to benzoic acid on refluxing with acidic KMnO4 solution. (c) on refluxing with concentrated H2SO4 gives a mixture of ortho and para toluenesulfonic acid. (d) can be nitrated with concentrated nitric acid to give a mixture of ortho and meta nitrotoluene.

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When glycerol is treated with a mixture of concentrated HNO3 + H2SO4, it forms (a) Nitroethane (b) 1-Nitropropane (c) Nitroglycerine (d) 2-Nitropropane

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Out of (a) 0.01 M KNO3 , (b) 0.01 M Na2 SO4 which aqueous soln. will exhibit high B. P.?

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When conc. H2 SO4 is added to dry KNO3 , brown fumes are evolved. These fumes are due to (1) SO3 (2) SO2 (3) NO2 (4) N2O

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A circular plate, a cube and a sphere, all made up of same material and having the same mass, are heated to 300°C and left in a room. Which of them will have the slowest rate of cooling? (1) Circular plate (2) Cube (3) Sphere (4) All will cool at the same rate

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A cube, sphere & a thin circular plate (all having same mass and made of same material) are all heated to 300°C and allowed to cool in natural air. Which one will cool the slowest? (A) Cube (B) Plate (C) Sphere (D) All will cool at the same rate

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Last Answer : (D) All will cool at the same rate

The radiation heat flux from a heating element at a temperature of 800°C, in a furnace maintained at 300°C is 8 kW/m2 . The flux, when the element temperature is increased to 1000°C for the same furnace temperature is (A) 11.2 kW/m2(B) 12.0 kW/m2(C) 14.6 kW/m2(D) 16.5 kW/m

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Last Answer : (D) 16.5 kW/m2

For water at 300°C, it has a vapour pressure 8592.7 kPa and fugacity 6738.9 kPa Under these conditions, one mole of water in liquid phase has a volume of 25.28 cm3 and that in vapour phase in 391.1 cm3.Fugacity of water (in kPa) at 9000 kPa will be (A) 6738.9 (B) 6753.5 (C) 7058.3 (D) 9000

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Last Answer : (B) 6753.5

A cyclic engine exchanges heat with two reservoirs maintained at 100 and 300°C respectively. The maximum work (in J) that can be obtained from 1000 J of heat extracted from the hot reservoir is (A) 349 (B) 651 (C) 667 (D) 1000

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Last Answer : (A) 349

Brazing filler metal used for joining steel plates (A) Melts below the melting points of base metals (B) Melts below 300°C (C) Is copper phosphorous alloy

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Last Answer : (A) Melts below the melting points of base metals

A circular plate, a cube and a sphere, all made up of same material and having the same mass, are heated to 300°C and left in a room. Which of them will have the slowest rate of cooling? (1) Circular plate (2) Cube (3) Sphere (4) All will cool at the same rate

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Last Answer : Sphere

acetaldehyde reacts with a mixture of KCN and `NH_(4)Cl` to give a product X which upon hydrolysis yields alanine. The products X is

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Pyridine undergoes nuclophilic substitution with NaNH2 at 100°C to form (a) 2-Aminopyridine (b) 3-Aminopyridine (c) 4-Aminopyridine (d) None of these

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Last Answer : 2-Aminopyridine

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Last Answer : sp2 hybrid orbita

Pyrrole is less basic than pyridine because the lone-pair of electrons on Natom in pyrrole (a) is part of the delocalized π molecular orbital. (b) is not part of the delocalized π molecular orbital. (c) resides in sp2 hybrid orbital (d) resides in sp hybrid orbital

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Last Answer : is part of the delocalized π molecular orbital.

Pyridine has a delocalized π molecular orbital containing (a) 4 electrons (b) 6 electrons (c) 8 electrons (d) 12 electrons

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Last Answer : 6 electrons

The ‘N’ atom in pyridine is (a) sp3 hybridized (b) sp2 hybridized (c) sp hybridized (d) cannot be predicted

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Which of the following heterocyclic compounds is not aromatic? (a) Pyridine (b) Pyrrole (c) Furan (d) Piperidine

Description : Which of the following heterocyclic compounds is not aromatic? (a) Pyridine (b) Pyrrole (c) Furan (d) Piperidine

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Last Answer : Pyridine

What is Potassium Nitrate ( KNO3) known in Bangladesh ?

Description : What is Potassium Nitrate ( KNO3) known in Bangladesh ?

Last Answer : Salt Peter or Nitrate of Potash.

How many atoms are in 2 KNO3?

Description : How many atoms are in 2 KNO3?

Last Answer : The number of atoms in two formula units of potassium nitrate is 10.

What are Two Reasons why the percent composition of Zn(No3)2 plus 2 KOH Zn(OH)2 plus 2 KNo3 is not 100?

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How do you balance KNO3 plus H2CO3 K2CO3 plus HNO3?

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If 140 grams of KNO3 is dissolved in 100g of water at 80oC, the solution will be?

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Last Answer : That's hard

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Last Answer : (B) K2O

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