Description : Why HCOOH does not give HVZ (Hell Volhand Zelinsky) reaction but CH3COOH does ?
Last Answer : Ans. CH3 COOH contains hydrogens and hence give HVZ reaction but HCOOH does not contain -hydrogen and hence does not give HVZ reaction.
Description : Which of the following reagents will react with pyrrole to form 2- formylpyrrole? (a) HCOOH (b) CHCl3/KOH (c) H2O2 (d) (CH3CO)2O/SnCl4
Last Answer : CHCl3/KOH
Description : What is the hybridization of the carbon atom in CH3NH2? (a) 3sp3 (b) sp (c) sp2 (d) sp3
Last Answer : sp3
Description : What is the hybridization of the nitrogen atom in CH3NH2? (a) sp (b) sp2 (c) sp3 (d) s-sp3
Description : Which of the following has the greatest solubility in CH3CH2CH2CH3? (a) CH3OH (b) CH3NH2 (c) CH3OCH3 (d) (CH3)3CH
Last Answer : (CH3)3CH
Description : What is the conjugate base of CH3NH2? (a) CH3NH3+ (b) CH3NH– (c) NH4+ (d) NH2–
Last Answer : CH3NH–
Description : What is the conjugate acid of CH3NH2? (a) CH3NH3+ (b) CH3NH– (c) NH4+ (d) NH2–
Last Answer : CH3NH3+
Description : Which of the following is not normally considered to be a nucleophile? (a) NH3 (b) CH3NH2 (c) HC≡C:– (d) CH3CH2+
Last Answer : CH3CH2+
Description : Which one of the following substances will form strong hydrogen bonds? A HCOOH B CH3CN C CCl4 D SiH4 E CH3OCH3
Last Answer : A HCOOH
Description : The reaction `RCH_(2)CH_(2)COOH overset(Red P)underset(Br_(2))toRCH_(2)-underset(Br)underset(|)(C)HCOOH` is called as
Last Answer : The reaction `RCH_(2)CH_(2)COOH overset(Red P)underset(Br_(2))toRCH_(2)-underset(Br) ... reaction C. Reimer Teimann reaction D. Sandmeyer reaction
Description : Which is decreasing order of acidity in, `HCOOH(I), CH_(3)COOH(II), CH_(3)CH_(2)COOH(III) and C_(6)H_(5)COOH(IV)`?
Last Answer : Which is decreasing order of acidity in, `HCOOH(I), CH_(3)COOH(II), CH_(3)CH_(2)COOH( ... B. `IVgtIIIgtIIgtI` C. `IVgtIgtIIgtIII` D. `IgtIVgtIIgtIII`
Description : Is CH3NH2 inorganic or organic?
Last Answer : CH3NH2 is methyl amine, and it is ORGANIC.
Description : What is the atomic mass of HCOOH(formic acid)?
Last Answer : The molar (not atomic) mass of HCOOH (formic acid) is 46,03g.
Description : Name the acid present in Ant sting and its chemical formula. (a) Methanoic acid and HCOOH (b) Formic acid and HCOOH (c) Acetic acid and CH3COOH (d) Both a and b
Last Answer : (d) Both a and b
Description : Two liquids (A)and(B)are separated by fractional distillation, the boiling point of (A) is less than (B).which liquid comes out first in distillate? Explain.
Last Answer : The liquid (a) comes out first in distillate. On boiling the vapours of lower boiling component are formed first.
Description : Explain the following (a) The density of ice is less than that of liquid water? (b) The boiling point of water is less than that of H2S. (c) NaH has higher reducing character than H2O.
Last Answer : Ans-a) In structure of ice , Oxygen atom is tetrahedrally surrouneded by four hydrogen (with two hydrogen by hydrogen bond and with two hydrogen by covalent bond ) and have vacant spaces in ... Due to extensive hydrogen bonding in water c)NaH is ionic compound while water is a covalent compound
Description : Asserion (A): The boiling point of `C_(2)H_(5)OH` is less than that of `H_(2)O` though the molecular weight of `C_(2)H_(5)OH` is more than that of wat
Last Answer : Asserion (A): The boiling point of `C_(2)H_(5)OH` is less than that of `H_(2)O` though the molecular ... but R is false D. A is false but R is true
Description : At hill stations, the boiling point of water will be – (1) same as at sea level (2) less than that at sea level (3) more than that at sea level (4) equal to the melting point of ice
Last Answer : (2) less than that at sea level Explanation: The boiling point is the temperature at which the vapour pressure of the liquid equals the environmental pressure surrounding the liquid. Atmospheric pressure ... The atmospheric pressure at high altitudes like hill station is less than at the sea level.
Description : . A dilute aqueous solution is to be concentrated in an evaporator system. High pressure steam is available. Multiple effect evaporator system is employed, because (A) Total heat transfer area of ... in a single effect is much lower than that in any effect in a multi-effect system
Last Answer : (B) Total amount of vapor produced per Kg of feed steam in a multiple effect system is much higher than in a single effect
Description : The capacity of double-effect evaporator is less than half of the capacity of two single effects, each of which is operating over same terminal temperature difference, when the (A) Solution has ... B) Evaporators operate under vacuum (C) Evaporators operate at atmospheric pressure (D) None of these
Last Answer : (A) Solution has an elevation of boiling point
Description : In sub-cooled boiling, (A) Temperature of the heating surface is less than the boiling point of the liquid (B) Temperature of the heating surface is more than the boiling point of the liquid (C) ... from heating surface are absorbed by the mass of the liquid (D) Very large vapour space is necessary
Last Answer : (B) Temperature of the heating surface is more than the boiling point of the liquid
Description : At hill stations, the boiling point of water will be (1) same as at sea level (2) less than that at sea level (3) more than that at sea level (4) equal to the melting point of ice
Last Answer : less than that at sea level
Description : Why do trans isomers of alkenes have lower boiling points than cis isomers? (a) trans isomers have better symmetry (b) cis isomers have better symmetry (c) trans isomers are less polar (d) cis isomers are less polar
Last Answer : trans isomers are less polar
Description : Glycerine is used as a coolant in cooling of some engines instead of water, because (A) Its higher boiling point (290°C) increases its heat carrying capacity (B) Comparatively less weight of coolant is required (C) Smaller radiator can be used (D) All a, b & c
Last Answer : (D) All a, b & c
Description : Give reasons i) H2O is a liquid but H2S a gas. ii) Ammonia has higher boiling point than phosphine ii) Krypton & xenon make compounds.
Last Answer : Ans: i) Hydrogen bond is found in H2O but not in H2S. ii) Hydrogen bond is found in NH3 but not in PH3. iii) Because they have low ionization energy.
Description : Give reason for the higher melting point and boiling point of alkali earth metals than alkali metals.
Last Answer : The melting and boiling points of these metals are higher than the corresponding alkali metals due to smaller sizes.
Description : Which of the following properties is lower for a solution than for the pure solvent? w) osmotic pressure x) vapor pressure y) temperature z) boiling point
Last Answer : ANSWER: X -- VAPOR PRESSURE
Description : Which of the following properties is greater for a solution than for the pure solvent? w) freezing point x) vapor pressure y) temperature z) boiling point
Last Answer : ANSWER: D -- BOILING POINT
Description : What element has a lower boiling point than hydrogen?
Last Answer : ANSWER: HELIUM
Description : What is the boiling point of liquid Nitrogen ? -Chemistry
Last Answer : The boling point of liquid nitrogen is -195 degree C.
Description : What is the boiling point of titanium ?
Last Answer : Titanium has a boiling point of 3277 degrees Celsius.
Description : What is the boiling point of scandium ?
Last Answer : Scandium has a boiling point of 2831 degrees Celsius.
Description : What is the boiling point of helium ?
Last Answer : Helium has a boiling point of minus 269 degrees Celsius.
Description : What is the boiling point of hydrogen ?
Last Answer : The boiling point of hydrogen is minus 253 degrees Celsius.
Description : What is the boiling point of calcium ?
Last Answer : Calcium boiling point is 1487 degrees Celsius.
Description : What is the boiling point of potassium ?
Last Answer : The boiling point of potassium is 754 degrees Celsius.
Description : What is the boiling point of argon ?
Last Answer : Boiling point of argon - 186 degrees Celsius.
Description : What is the boiling point of chlorine ?
Last Answer : Boiling point of chlorine - 34 degrees Celsius.
Description : What is the boiling point of sulfur ?
Last Answer : The boiling point of sulfur is 445 degrees Celsius.
Description : What is the boiling point of phosphorus ?
Last Answer : Phosphorus boiling point is 280 degrees Celsius.
Description : What is the boiling point of silicon ?
Last Answer : Silicon has a boiling point of 2355 degrees Celsius.
Description : What is the boiling point of aluminum ?
Last Answer : The boiling point of aluminum is 2467 degrees Celsius.
Description : What is the boiling point of magnesium ?
Last Answer : The boiling point of magnesium is 1090 degrees Celsius.
Description : t itle: What is the boiling point of sodium ?
Last Answer : The boiling point of sodium is 890 degrees Celsius.
Description : What is the boiling point of neon ?
Last Answer : Neon's boiling point - 246 degrees Celsius.
Description : What is the boiling point of fluorine ?
Last Answer : Boiling point of fluorine - 188 degrees Celsius.
Description : What is the boiling point of oxygen ?
Last Answer : Boiling point of oxygen - 196 degrees Celsius.
Description : What is the boiling point of carbon ?
Last Answer : The boiling point of carbon is 4827 degrees Celsius.
Description : What is the boiling point of boron ?
Last Answer : Boron's boiling point is 3660 degrees Celsius.
Description : What is the boiling point of beryllium ?
Last Answer : The boiling point of beryllium is 2990 degrees Celsius.