What is the correct thermodynamic conditions for a spontaneous reaction at all temperatures?
1. H > 0 and S< 0
2. H < 0 and S> 0
3. H < 0 and S< 0
4. H > 0 and S = 0
1. H > 0 and S< 0
2. H < 0 and S> 0
3. H < 0 and S< 0
4. H > 0 and S = 0
Subtopic: Gibbs Energy Change |
85%
Level 1: 80%+
NEET - 2016
Hints
Natural rubber has:
1. All trans-configuration
2. Alternate cis - and trans-configuration
3. Random cis - and trans-configuration
4. All cis-configuration
Subtopic: Polymers: Natural & Synthetic, Biodegradable & Non Biodegradable |
86%
Level 1: 80%+
NEET - 2016
Hints
In which of the following options, the order of arrangement does not agree with the variation of the property indicated against it?
| 1. | B < C < N < O (increasing first ionisation enthalpy) |
| 2. | I < Br < F < Cl (increasing negative electron gain enthalpy) |
| 3. | Li < Na < K < Rb (increasing metallic radius) |
| 4. | Al3+ < Mg2+ < Na+ <F– (increasing ionic size) |
Subtopic: Ionization Energy (IE) | Electron Affinity (EA) |
83%
Level 1: 80%+
NEET - 2016
Hints
Which of the chemical reagents can be used to distinguish between cis-cyclopenta-1,2-diol
and trans-cyclopenta-1,2-diol?
and trans-cyclopenta-1,2-diol?
1. Ozone
2. MnO2
3. Aluminium isopropoxide
4. Acetone
Subtopic: Aldehydes & Ketones: Preparation & Properties |
Level 3: 35%-60%
NEET - 2016
Hints
The product obtained as a result of a reaction of nitrogen with CaC2 is:
1. CaCN
2. CaCN3
3. Ca2CN
4. CaCN2
Subtopic: Compounds of Ca and Na -Preparations, Properties & Uses |
56%
Level 3: 35%-60%
NEET - 2016
Hints
Fog is a ______ type of colloidal solution:
1. Gas in liquid.
2. Solid in gas.
3. Gas in gas.
4. Liquid in gas.
2. Solid in gas.
3. Gas in gas.
4. Liquid in gas.
Subtopic: Colloidal Solution |
80%
Level 1: 80%+
NEET - 2016
Hints
Links
Which one of the following orders is correct for the bond dissociation enthalpy of halogen molecules?
1. Cl2 > Br2 > F2 > l2
1. Cl2 > Br2 > F2 > l2
2. Br2 > l2 > F2 > Cl2
3. F2 > Cl2 > Br2 > l2
4. l2 > Br2 > Cl2 > F2
Subtopic: Group 17 - Preparation, Properties & Uses |
73%
Level 2: 60%+
NEET - 2016
Hints
Equal moles of hydrogen and oxygen gases are placed in a container with a pin-hole through which both can escape. What fraction of the oxygen escapes in the time required for one-half of the hydrogen to escape?
1. 1/4
2. 3/8
3. 1/2
4. 1/8
2. 3/8
3. 1/2
4. 1/8
Subtopic: Graham's Law |
63%
Level 2: 60%+
NEET - 2016
Hints
Lithium has a bcc structure. Its density is 530 kg m-3 and its atomic mass is 6.94 g mol-1. The edge length of a unit cell of lithium metal is:
(NA= 6.02 X 1023 mol-1)
(NA= 6.02 X 1023 mol-1)
1. 352 pm
2. 527 pm
3. 264 pm
4. 154 pm
Subtopic: Density & Packing Fraction |
56%
Level 3: 35%-60%
NEET - 2016
Hints
Links
Consider the following statements about the composition of the vapour over an ideal 1:1 molar mixture of benzene and toluene. The correct statement is:
Assume that the temperature is constant at 25 oC.
(Given, vapour pressure data at 25 °C, benzene = 12.8 kPa, toluene = 3.85 kPa)
| 1. | The vapour will contain a higher percentage of toluene. |
| 2. | The vapour will contain equal amounts of benzene and toluene. |
| 3. | Not enough information is given to make a prediction. |
| 4. | The vapour will contain a higher percentage of benzene. |
Subtopic: Introduction & Colligative properties |
64%
Level 2: 60%+
NEET - 2016
Hints
Links
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