UP PGT Chemistry Mock Test - 5 - UPTET MCQ

The correct answer is Option D.
Only primary amines liberate nitrogen gas on reaction with HNO2.

The dispersion of a freshly precipitated material into colloidal solution by the action of an electrolyte in solution is termed peptization. The electrolyte used is called a peptizing agent. For Example, sols obtained by peptization are: Freshly prepared ferric hydroxide on treatment with a small amount of ferric chloride solution at once forms a dark reddish brown solution. Ferric chloride acts as a peptizing agent.

The correct answer is option C
'a' carbon of glucose and 'b' carbon of fructose
Carbon adjacent to the oxygen atom in the cyclic structure of glucose or fructose is known as anomeric carbon. As shown in the structure above ‘a’ and ‘b’ are present adjacent to an oxygen atom. Both carbons differ in configurations of the hydroxyl group.

The correct answer is Option C.
Unit of rate of reaction =sec⁻¹

∴ Units of K1 = sec⁻¹

∴ Unit of K₂ = M⁻¹sec⁻¹

Sodium saccharin (benzoic sulfimide) is an artificial sweetener with effectively no food energy. It is about 300–400 times as sweet as sucrose but has a bitter or metallic aftertaste, especially at high concentrations. Saccharin is used to sweeten products such as drinks, candies, cookies, and medicines.

H₂CO forms cyclic acetal with ethylene glycol but the change cannot be observed visually, in all other cases, change can be observed visually-effervescence with NaNH₂ and NaH while colour change with CrO₃ -H₂SO₄.

The correct answer is Option C
Fat soluble vitamin - A, D, E, K
Water soluble vitamin - Vitamin B complex and C
So, vitamin B is water soluble.
Vitamins which can dissolve in water are called water-soluble vitamins. Water-soluble vitamins include vitamin-C and vitamin-B because they remove the toxins from our body through urine. Therefore, they are not stored in our body and should be taken on a daily basis through the food we eat.

Maleic Acid shows Geometrical Isomerism but does not give optical isomerism.

The aufbau principle explains how electrons fill low energy orbitals (closer to the nucleus) before they fill higher energy ones. Where there is a choice between orbitals of equal energy, they fill the orbitals singly as far as possible(Hunds rule). The diagram summarizes the energies of the orbitals up to the 4p level.Therefore 3d orbitals have higher energy than the other orbitals in the options.

So answer is: (2) n = 3, l = 2, m = 1, s = +1⁄2

The gaseous byproducts escape out on its own continuously driving the reaction in forward direction.

Permutit is hydrated sodium aluminum silicate, it exchanges it’s sodium ions for divalent ions of calcium and magnesium, permutit when fully exhausted can be regenerated by treating with 10% of sodium chloride solution. It is the most efficient method to get water with zero degrees of hardness.

Al³⁺ because they all have the same number of electrons, however Al3+ has the most protons and therefore greatest nuclear charge. In Al³⁺, the same number of electrons are being attracted by more protons in the nucleus, so the electrons are being pulled closer to the nucleus, reducing the size of the ionic radius.

deuterium , also known as heavy hydrogen) is one of two stable isotopes of hydrogen (the other being protium, orhydrogen-1). The nucleus of deuterium, called a deuteron, contains one proton and one neutron, whereas the far more common protium has no neutron in the nucleus.

Sc (3d¹ 4s²)has 631 kJ mol^-1 and Zn (3d¹⁰ 4s²) has 906 kJ mol^-1 

It is semi synthetic polymer.

Be & Mg due to small size does not impart colour to the flame as excitation & deexcitation is not possible.

The converter should contain ceramic honeycomb coated with precious metals

Due to diagonal relationship, Li resembles Mg.

To balance oxidation number, cross-multiply by change in oxidation number

• Neoprene is not a condensation polymer. It is an addition polymer.
• Neoprene is made from monomer chloroprene (2-chlorobuta-1,3-diene). 
• Dacron, Melamine and Glyptal are condensation polymers.
• Dacron ( also known as terylene) is a polyester made by condensation polymerisation of ethylene glycol and dimethyl terephthalate.
• Glyptal is a copolymer of ethylene glycol and phthalic acid.
• Melamine ( or formaldehyde melamine polymer) is obtained from condensation polymerisation of melamine with formaldehyde.

There are 4 atoms that are directly linked to each Cr atom.

Δ_o value is directly proportional to energy and inversely related to the wavelength. Also, more the ligand is a strong field ligand More will be the value of Δ_o and lower will be its wavelength. Among the given complexes the strength of ligands are Br⁻ < H2O < en.

Since the emitted colours are red, green, blue the absorbed colours must be green,red,orange. Hence the  compound [M(H2O)6]²⁺, [M(en)3]²⁺, [M(Br)6]⁴⁻ are blue red and green respectively. Hence option B is correct.

C(s) + CO₂(g) <=========> 2CO(g)
K_p = pCO²/pCO²
GIven K_p = 63 and p_CO = 10p_CO2
Putting the value of pCO in above equation,
63 = 100(_pCO²)²/p_CO2
Or p_CO2 = 0.63
p_CO = 6.3
Therefore, total pressure = 6.3+0.63 = 6.93 atm

As per IUPAC nomenclature, the roots are as follows: 0 – nil, 1 – un, 2 – bi, 3 – tri, 4 – quad, 5 – pent, 6 – hex, 7 – sept, 8 – oct and 9 – enn. So 115 is Ununpentium and the official name is Moscovium was named after the Moscow Oblast in which Joint Institute for Nuclear Research is situated.

The correct answer is option c

The above product is meso form of an isomer which is a type of stereoisomer that possesses an internal plane of symmetry. This symmetry leads to identical or equivalent substituent groups on either side of the plane, resulting in an overall non-chiral (achiral) molecule. Despite having stereocenters, the meso form does not exhibit optical activity because any rotation around the internal plane of symmetry can interconvert its mirror-image configurations, making them superimposable.

Due to symmetry in the complex [Co(NH₃)₃CI₃], it failed to show optical isomerism. The type of coordination entity show fac and mer isomerism or geometrical isomerism.

The facial (fac) and meridional (mer) isomers of [Co(NH₃)₃CI₃]. 

These monomers form PHBV.

Stability of hydrides decreases down the group so most stable is H₂O  

PCl₅ dissociation a closed container