Methane reacts with steam at 1273 K in the presence of nickel catalyst to form:
1. CO and \(H_2\)
2. CO and \(H_2O\)
3. \(CO_2\) and \(H_2O\)
4. \(CO_2\) and \(H_2\)
1. CO and \(H_2\)
2. CO and \(H_2O\)
3. \(CO_2\) and \(H_2O\)
4. \(CO_2\) and \(H_2\)
Subtopic: Aliphatic Hydrocarbon- Physical Properties | Alkanes, Alkenes and Alkynes - Chemical Properties |
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Compound P (C8H8O) gives a red orange precipitate with 2,4-DNP reagent and it does not reduce Fehling's reagent. On drastic oxidation with chromic acid, P gives an aromatic product Q that produces effervescence on treating with aq. NaHCO3; Compounds P and Q, respectively, are :
| 1. |  |
| 2. |  |
| 3. |  |
| 4. |  |
Subtopic: Aldehydes & Ketones: Preparation & Properties | Carboxylic Acids: Preparation & Properties |
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A solution of copper sulphate is electrolysed for 10 minutes with a current of 1.5 amperes. The mass of copper deposited at cathode is:
(Given : Molar mass of Cu = 63 g mol-1; 1 F = 96487 C mol-1)
1. 2.4036 g
2. 1.7018 g
3. 0.5876 g
4. 0.2938 g
(Given : Molar mass of Cu = 63 g mol-1; 1 F = 96487 C mol-1)
1. 2.4036 g
2. 1.7018 g
3. 0.5876 g
4. 0.2938 g
Subtopic: Faraday’s Law of Electrolysis |
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The functional group that can be identified through phthalein dye test is:
1. Phenolic
2. Alcohol
3. Aldehyde
4. Carboxylic acid
1. Phenolic
2. Alcohol
3. Aldehyde
4. Carboxylic acid
Subtopic: Phenols: Preparation & Properties | Electrophilic Substitution Reactions, Uses of Phenols |
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The correct statement about the secondary structure of DNA/RNA is :
| 1. | DNA possesses a single-stranded helix structure and contains uracil as one of the four bases. |
| 2. | RNA possesses a single-stranded helix structure and contains thymine as one of the four bases. |
| 3. | DNA possesses a double-stranded helix structure and contains thymine as one of the four bases. |
| 4. | RNA possesses a double-stranded helix structure and contains uracil as one of the four bases. |
Subtopic: DNA, RNA & Metal Ions |
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Identify the correct statements:
Choose the correct answer from the options given below :
1. A and C only
2. A, B, and C only
3. A, D, and E only
4. A and B only
| A. | The molality of 2.5 g of ethanoic acid (Molar mass: 60 g mol-1) in 75 g of benzene solution is 0.556 m. |
| B. | The molarity of a solution containing 5 g of NaOH (molar mass: 40 g mol-1) in 450 mL of solution is 0.278 M at 298 K. |
| C. | Aquatic species are more comfortable in cold water. |
| D. | The solubility of a gas increases with a decrease in pressure. |
| E. | For a binary mixture of A and B, the number of moles of A and B are nA and nB, respectively. The mole fraction of B will be xB = nA / (nA + nB). |
Choose the correct answer from the options given below :
1. A and C only
2. A, B, and C only
3. A, D, and E only
4. A and B only
Subtopic: Concentration Terms & Henry's Law |
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A mixture of chloroform and acetone forms a solution with negative deviation from Raoult's law due to :
| 1. | formation of hydrogen bonding between acetone and chloroform. |
| 2. | increase in the escaping tendency of molecules of each component. |
| 3. | stronger intermolecular forces between chloroform molecules than those between chloroform and acetone molecules. |
| 4. | repulsive forces. |
Subtopic: Raoult's Law |
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At 298 K, a certain buffer solution contains equal concentrations of X- and HX, Kb for X- is 10-10.
What is the pH of this buffer solution ?
1. 2
2. 10
3. 4
4. 6
What is the pH of this buffer solution ?
1. 2
2. 10
3. 4
4. 6
Subtopic: pH calculation | Buffer |
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Identify the incorrect statement from the following:
| 1. | The name of the element with atomic number 107 is Unnilseptium. |
| 2. | The largest and the smallest species among \(\text{Mg}\), \(\text{Mg}^{2+}\), \(\text{Al}\) and \(\text{Al}^{3+}\) are \(\text{Al}\) and \(\text{Mg}^{2+}\), respectively. |
| 3. | The similarity in behaviour of \(\text{Li}\) with \(\text{Mg}\) is referred to as 'diagonal relationship'. |
| 4. | The oxidation state and covalency of \(\text{Al}\) in \([\text{AlCl}(\text{H}_2\text{O})_5]^{2+}\) are 3 and 6 respectively. |
Subtopic: Modern Periodic Table & Periodicity | Atomic Size |
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The correct order of increasing metallic character of Na, Be, P, Mg and Si is:
1. P < Si < Be < Mg < Na
2. Be < Si < P < Mg < Na
3. P < Si < Na < Mg < Be
4. P< Mg < Be < Si < Na
1. P < Si < Be < Mg < Na
2. Be < Si < P < Mg < Na
3. P < Si < Na < Mg < Be
4. P< Mg < Be < Si < Na
Subtopic: Modern Periodic Table & Periodicity | Nature of Compound |
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