AWES PGT Chemistry Mock Test - 8 - AWES TGT/PGT MCQ

Multinational Exercise 'Cutlass Express' 2024 was organized at PortVictoria, Seychelles from 26 February to 08 March 2024. Indian Naval ship 'INS Tir' represented the Indian contingent. 16 countries participated in this exercise. The Indian Navy has been participating in this exercise since 2019.

The time between two successive passages of the mean sun across the meridian at noon is known as mean solar time. It means that solar time is equal to one day. Some additional facts:

• 1 Astronomical Unit = 1.5 × 1011 m. It is used to determine the distance between the earth and the sun. 
• 1 Slug = 14.59 kg. It is a unit of mass in the FPS System. 
• 1 Lunar Month = 27.3 solar days. It is the time between the two consecutive full moons. 

Hence, we conclude that one solar day is of 24 hours.

(a) CO (14e), no unpaired electron, magnetic moment = 0
CO⁺ (13e), One electron is lost from bonding melecular orbital unpaired electron = 1, magnetic moment =
(b)  (15e) Unpaired electron = 1, magnetic moment =
(13e) Unpaired electron = 1, magnetic moment =
(c) Zn, Zn²⁺, unpaired electron = 0
(d) O₂ (16e), unpaired electron = 2, magnetic moment =
, unpaired electron = 1, magnetic moment =

The negative electron gain enthalpy of fluorine is less than that of chlorine. It is due to small size of fluorine atom. As a result, there are strong interelectronic repulsions in the relatively small 2p orbitals of fluorine and thus, the incoming electron does not experience much attraction.

(a.c.d) Regardlessvehether a cell is a volatic or an electrolysis cell, anode s the electrode at which oxidation takes place and cathode is the electrode at which reduction takes place. In electrochemical cell, Zn → Zn²⁺ + 2e^- .

It is losing electrons thus, anode is negative terminal. In electrolysis cell. cation migrates to cathode thus -ye terminal. anion migrates to anode thus +ve terminal. 

= 2.53/106   2.59 × 10^-2  5.9 × 10^-2
0.238 × 0.25          = 1.18 × 10^-3

250 ml - 0.238

= 0.955

0.955  0.955 

Since both cation & anion constitute coordination sphere so it exhibit coordination isomerism and contains ambident ligand so, it shows linkage isomerism

Fluorine has highest electronegativity among all known elements, so it shows only negative oxidation states.

Due to unpaired electron paramagnetic, N-atom in NO₂ is electron deficie nt thus, to complete octet, dimer is formed.

In N₂O₄ formation, each N-atom gets charge. Dipole-dipole repulsion increases (N— N) bond length which is larger than (N— N)covalent bond.

Thus, (a), (b), (c) and (d) are correct. 

In oxymercuration-demercuration reaction, Markownikoff's addition of H₂O takes place with HO^- added to carbon where more stable carbocation could be formed.

Recycling of materials and energy will lead to decrease in environmental pollution

Bredig's arc method is a method of preparation of the colidal solution of metals such as silver, gold, platinum etc. Copper sol is not prepared using Bredig's arc method.

The correct answer is option  A
1-butyne can react with sodium in liquid ammonia. Because terminal alkynes have acidic hydrogen. This acidic hydrogen can replace Na in presence of liquid ammonia.

 

NaHCO₃ + H₂SO₄ →  Na₂SO₄ + H₂O + CO₂
extingusher fire

Dobereiner's Triads were groups of three elements with similar chemical properties, where the atomic mass of the middle element was approximately equal to the average of the other two. Carbon, being a nonmetal with a unique set of properties, did not fit into any known triad.

BeO is amphoteric due to its diogional similarly with Al

The enthalpies of fusion for all reactions are always positive because melting of a solid is an endothermic process in which heat is supplied to the reaction Hence the sum of enthalpies of the product is greater than the sum of enthalpies of the reactant.

Ozone is detected by using Hg.

Group 15 doping on group 14 element forms n type semiconductor due to excess electrons.

Precipitation of AgCl is an example of instantaneous reaction.

30% of hydrogen peroxide is called Perhydrol, which is used as an antiseptic and germicide for washing wounds, teeth, and ears. The volume strength of Perhydrol is hundred and its molarity is given by 8.8

The amount of energy required to remove an electron from the atom decreases. Ionization potential, thus, decreases down a group. The element with highest ionization potential in the periodic table is Helium (2372.1 kj/mol), while the element with the lowest ionization potential is Caesium (375.7 kj/mol).

Conductivity is high due to [H⁺]

For 4f orbital electrons, n = 4

                       s p d f

l = 3 (because 0 1 2 3 )

m = +3, +2, +1, 0, –1, –2, –3

s = ±1/2.

As shown in the above mechanism 1-butene and 2-butene cannot be formed by this free radical. release of 1 hydrogen radical gives 2-methyl propene as disproportionated product.

Hence, the correct option is C.

Chemical Formula: ZnSO₄
Molar Mass: 161.47 g/mol (anhydrous)

Be and Al forms compound with Cl as BeCl

F^- is isoelectronic with Ne  both have 10 electrons

Both statements are true but the two different products are due to resonance in carbocation intermediate as