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CH3CH2COCl IUPAC name

A. Propanoyl Chloride B. Ethanoyl Chloride C. Acetyl Chloride D. Chloroethane Solution: (A) CH3CH2COCl has three carbon atoms in the parent... View Article

Oxidation number of iodine in IO3−, IO4−, KI and I2 respectively is _____

A. -2, -5, -1 ,0 B. +5, +7, -1 , 0 C. +2, +5, +1 , 0 C. -1, +1 , 0, +1 Solution: (B) We willl take the oxidation number of iodine as x. The... View Article

The pH of a mixture of 0.01MHCl and 0.1MCH3COOH is approximately

A. 1 B. 2 C. 4 D. 7 Solution: (A) [H+] = 10−2 [OH−] = 10−1 [H+]f = 10−2 × 1000 + 10−1 × 1000 / 1000 + 1000 = 5 × 10−2 Therefore, pH =... View Article

Platinised asbestos is used as a catalyst in the manufacture of

A. HCl B. H2SO4 C. HNO3 D. None of the above Solution: (B) Platinised asbestos is used as a catalyst in the manufacture of H2SO4 (Sulphuric Acid).... View Article

Which of the following molecules can act as a nucleophile and an electrophile?

A. CH3NH2 B. CH3Cl C. CH3CN D. CH3OH Solution: (A) We will look at how CH3NH2 act as a nucleophile and an electrophile; CH3NH2 as a... View Article

Which among the following pairs of molecules can be distinguished by haloform reaction?

A. CH3CHO and CH3COCH3 B. CH3CHO and CH3CH2OH C. CH3OH and CH3CH2OH D. HCHO and CH3CHO Solution: (C and D) Only methyl ketones or alcohols... View Article

Which one of the following halogen compounds is difficult to be hydrolysed by SN 1 mechanism?

A. Tertiary butyl chloride B. Isopropyl chloride C. Benzyl chloride D. Chlorobenzene E. Allyl chloride Solution: (D) The C−Cl bond present... View Article

The number of helium atoms present in 320 amu helium is

Solution: (80) Number of atoms = Mass of substance / Atomic Mass Given, Mass of Helium = 320 amu Atomic mass of He = 4 Number of atoms = 320... View Article

Which of the following complexes have the longest M-C bond length?

A. Mn(CO)6]+ B. Cr(CO)6] C. Fe(CO)5] D. V(CO)6]− Solution: (A) The electron density on metal is less in Mn(CO)6]+ so it has the longest M-C... View Article

The density of methane at 2.0 atm pressure and 27 degrees centigrade is

A. 0.13gL-1 B. 0.26gL-1 C. 1.30gL-1 D. 26.0gL-1 Solution: (C) Given that Methane at 27°C and 2 atm Hence, T = 27°C = 300 K P = 2 atm We... View Article

Which of the following is the major product when 1-butanol is heated with concentrated H2SO4?

A. 1-butene B. Cis-2-butene C. Trans-2-butene D. All of these Solution: (C) Trans-2-butene is the major product when 1-butanol is heated... View Article

Which of the following pair cannot be separated by NaHSO3?

Solution: (C) NaHSO3 can react mainly with aldehyde and methyl ketone. If we... View Article

The density of a mixture of O2 and N2 is 1.33g/L

Solution: (0.28 atm) Let 1 mol of gas be present. So, 22.4 L will be the volume of the mixture Density = volume / mass The Molar Mass of the... View Article

The volumes of 4 N HCl and 10 N HCl required to make 1 litre of 6 N HCI are

A. 0.75 litre of 10 N HCI and 0.25 litre of 4 NHCI B. 0.25 litre of 4 N HCI and 0.75 litre of 10 NHCI C. 0.67 litre of 4 N HCI and 0.33 litre of... View Article

How many benzene based isomers are possible by the compound C7H8O?

Solution: (5) For aromatic compound C7H8O, the total number of isomers possible is 5. They are as follows:... View Article

The activation energies of the two reactions are E1 and E2 with E1 > E2. If the temperature of the reacting system is increased from T1 (rate constants are K1 and K2) to T2(rate constants are K1’ and K2’ ) predict which of the following alternative is correct?

A. K1′ / K1 < K2′ / K2 B. K1′ / K1 > K2′ / K2 C. K1′ / K1 = K2′ / K2 D. K1 / K1′ < K2 / K2′ Solution: (B) If we take the first... View Article

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