AWES TGT Chemistry Mock Test - 9 - AWES TGT/PGT MCQ

Mahindra & Mahindra has collaborated with Adani Total Energies to establish a nationwide EV charging infrastructure. This partnership aims to enhance e-mobility solutions and improve customer experience in line with climate action goals.

India and Colombia signed a Memorandum of Understanding (MoU) to share India’s open-sourced digital public infrastructure (DPI). The MoU is for cooperation in digital transformation, including sharing successful digital solutions that have been implemented at population scale. India has developed some of the world’s best digital public goods infrastructure, including delivering services to the public during the COVID pandemic.

City Union Bank, under the leadership of Dr N Kamakodi, earned seven awards at the 19th Banking Technology Conference, Expo & Citations in 2023. These awards recognize the bank's outstanding performance across various technological domains, showcasing its commitment to innovation and excellence in banking services.

The Quad alliance, comprising the United States, Australia, India, and Japan, is a strategic partnership aimed at enhancing cooperation in the Indo-Pacific region. It focuses on various areas such as security, economic development, and geopolitical stability. The alliance seeks to uphold a rules-based order and promote peace and prosperity in the region.

The OECD designates the United States as the leading aid provider in 2022, based on data from ForeignAssistance.gov, an official US government platform, providing insights into US aid patterns and destinations from 2001 to 2023. Between 2001 and 2023, the US allocated $677 billion in aid to 213 nations, with Afghanistan, Israel, and Iraq topping the list of recipients in the last two decades.

Afghanistan has officially closed its embassy in New Delhi permanently, attributing the decision to persistent challenges from the Indian government, following the cessation of operations on September 30.

The reason behind Kritika's this behaviour shows that her thoughts get acknowledged in schools. Sometimes it happens with children, if they feel that they are not being given importance or no one will praise them then they adopt such kind of behaviour that they talk only to those people who praise them gives due importance. Hence, the correct answer is, 'Her thoughts get acknowledged in schools.'

K₂O,    KO₂,  K₂O₂
Rb₂O,   RbO₂,   Rb₂O₂
Na, Li from normal oxide

When freshly prepared solution of FeSO₄ is added in a solution containing NO₃^– ion, it leads to formation of a brown coloured complex. This is known as brown ring test of nitrate.

Fehling's solution to make difference between carbohydrate and ketone functional grp and also used for differentiate reducing and non reducing sugar and as u know glucose is a reducing sugar so it will give red colour with fehling's solution (all monosachharides are reducing sugar).

Also X, has CH₃—CH(OH)—, gives iodoform test and it is chiral.

Charge and solvation of the colloidal particles

Lyophilic sols are colloidal solutions in which the dispersed particles have a strong attraction to the solvent. The stability of lyophilic sols is due to the charge and solvation of the colloidal particles. The particles carry a charge and are surrounded by a layer of solvent molecules, known as the solvation layer. This solvation layer acts as a barrier between the particles, preventing them from coming into contact and aggregating. The charge of the particles also helps to repel them and keep them dispersed.

The size of the colloidal particles is not a direct factor in the stability of lyophilic sols. The charge and solvation of the particles are more important in maintaining stability.

Solvation of the colloidal particles is one of the factors that contribute to the stability of lyophilic sols, but not the only one, it should be combined with the charge of the colloidal particles.

The correct answer is option A
Due to solute presence in the solution, the solution's boiling point is greater than the pure solvent's boiling point. This is called as elevation in boiling point and it can be represented as:
ΔT_b​=K_b​ × molality

Formal charge (F)

where, v = valence electrons = 6
s = shared electrons = 4
u = unshared electron = 4

Both (S – 1) & (S – 2) are true and (S – 2) is not the correct explanation of    (S – 1)

It forms a secondary carbocation which, by hydride shift, rearranges to a tertiary carbocation.

Periods:

• Elements are arranged in increasing the atomic number of elements in a period.
• One extra electron gets added to the outermost shell as we move along the periods from left to right.
• The electron gets added to the same shell or orbit and thus the electrons present for bonding increase by one unit.
• Thus, the shell number remains the same but the number of electrons present for bonding increases along a period.

Groups:

• Elements having the same number of outer electrons are put in the same group of the periodic table.
• When we move down a group, one extra shell gets added to the elements.
• The outermost shell has electrons present for bonding.
• Though the number of shells increases as we go down in a group, the number of electrons in the outermost shell remains the same.
• For example, the Halogens F, Cl, Br, I, At all belong to group 17 and have 7 electrons in the outermost shell.
• Similarly, Group 16 elements have 6 electrons in the outermost shell, group 15 has 5 electrons in the outermost shell, and so on.

Hence, group 17 is called halogens.

Most metal oxides are ionic crystals with high melting and boiling points. They are compounds that contain at least one metal and one oxygen atom, and are generally basic in nature. Metal oxides are basic because they react with acids to form salt and water, neutralizing the acids. 

(8) Barium phosphate is Ba₃( P0₄)₂.

LiAlH₄ reduces all oxiginated functional groups to alcohol and all nitrogenated functional groups to amine thus cyanide is a nitrogenated functional group and to convert cyanide to amine LiAlH4 can be used.

We have ∆G = ∆H - T∆S
At eqm. ∆G=0,
T = ∆H/∆S
    = 3.213 kJ mol-1 / 8.71 JK-1 mol-1
    = 368.88 K

Density = mass/volume. SI unit of mass is kg and that of volume is m³ so SI unit of Density is kg m⁻³

Hydrogen peroxide is used as a bleaching agent, disinfectant, source of power, in the restoration of old paintings in which lead oxide is used as a white paint, antiseptic and germicide. It is not used in teardrops.

Actually when ammonia is passed through a solution of calcium hypochlorite (bleaching powder), bromide water or passed over heated Cu oxide, it is oxidized to dinitrogen gas.

2NH₃ + 3CuO → 3Cu + 3H₂O + N₂
8NH₃ (excess) + 3Cl₂ → 6NH₄Cl + N₂

Fluorine forms molecules with fourteen metals because its small size and single charge as an ion allows surrounding metal atoms with more fluorines than oxygen.