UP PGT Chemistry Mock Test - 1 - UPTET MCQ

E1 Reactions involve carbocation intermediates which has characteristics of rearrangement into more stable carbocation, hence involves more than one transition states (usually).

various oxides of sulphur, nitrogen, carbon, halogens causes Tropospheric pollution

(III) forms tertiary carbocation, hence most reactive. (I) is least reactive as highly unstable carbocation is formed at bridge head carbon of bicyclic compound.

• Ionic solids or compounds are formed by the transfer of electrons from one atom to another atom.
• Hence there is always the formation of anion and cation due to opposite charges electrostatic force of attraction formed between them which holds them together.

Therefore, the correct answer is B. 

because of presence of lp of electron on head of oxygen atom the bond angle in water deviates from standard bond angle of 109.8⁰ . bond angle in water is 104.5⁰

Molarity is temperature dependent. In the formula of molarity, you have L of solution. Volume is temperature-dependent. It varies with changing temperature. Because of this, molarity changes if the temp changes. 

 2-bromomethyl-2-methyl-1-butanol: The bromine substitution occurs at the carbon bonded to oxygen but not at a chiral carbon. Thus option b satisfies the condition.

Molecularity is defined as the number of molecules, atoms, or radicals that must collide simultaneously in order for the reaction to take place. It is always a natural number and cannot be negative.

18g H₂O = 1mol water = 6.02 x 10²³ molecules of water = 6.02 x 10²³ atoms of oxygen.

As the number of moles of reactants and products is the same. Hence, they both will occupy equal volume at the same temperature.
Therefore, the reaction A i.e., H2 (g) +I2 (g) ⇌ 2HI (g) is not affected by change in pressure and volume.

Attractive forces tend to bring two atoms close to each other whereas repulsive forces tend to move them away. In hydrogen, the magnitude of the new attractive forces is greater than that of new repulsive forces. As a result, two atoms come close to each other and potential energy decreases. The atoms approach each other until the equilibrium stage is reached where the net force of attraction balances the force of repulsion and system acquires minimum energy. 

Functional isomers are structural isomers that have the same molecular formula (that is, the same number of atoms of the same elements), but the atoms are connected in different ways so that the groupings are dissimilar or different functional groups.

10 amine to different 10 amines are not functional isomers. 

Hence, option ′d′ is the answer.

Multimolecular colloids are formed when a large number of atoms or molecules of a substance aggregate together to form speices having size in colloidal range. sulphur sol contains a thousand of S8 molecules.

in earth atmosphere hydrogen exists in combined form.

In tellurium, differentiating electron enters in to 5p subshell. Its valence shell configuration is 5s²5p⁴.

For claiming credit for discovering 104^th element, the Americans named it Rutherfordium and the Soviets named it Kurchatovium. While it’s named Unnilquadium as per IUPAC nomenclature. Neptunium is the 93^rd element.

Ferromagnetic substance get permanently magnetised in applied Magnetic Field.

For positional isomerism in alkene 4C-atom required →

For geometrical isomerism in alkene also 4c–atom required →

By Fajans' rule,
Smaller the size of cation, larger the size of anion.
Larger the charge ord-electrons present, then larger the polarising power of cation and larger the covalent nature and smaller the solubility in water.

Cu²⁺ due to shielding effect causes more screening than Zn²⁺.
Thus, polarising power of Na⁺ <Zn²⁺ < Cu²⁺ hence, ionic nature and solubility in water is in order
CuS < ZnS < Na₂S

Due to the formation of a protective oxide layer on the surface of Be, its reactivity with acids decreases.

Amphiprotic : can accept and Release H⁺
Only H₂PO^–₄ & HCO^–₃

The given compound is the result of Hofmann Exhaustive Methylation reaction.
According to Hofmann Rule the less substituted alkene is the major product.


Hence CH₂ = CH₂ will be the major product with

2- pentanone is a methyl ketone. It undergoes haloform reaction with iodine in presence of sodium hydroxide, to form yellow precipitate of iodoform. 3- pentanone is not a methyl ketone. It does not undergo haloform reaction. Hence, 3- pentanone and 2- pentanone can be distinguished by reaction with iodine in presence of NaOH.

Only electronegativity of the given 4 decreases down the group whilst all the others increase or stay the same down the group.

Elements of group 1, i.e. Li, Na, K, Rb, Cs and Fr, are called alkali metals because they react with water to form alkaline solutions. The pH of solutions usually range between 8-12. 

The number of monohalogenation products obtained from any alkane depends upon the number of different types of hydrogen it contains. Compound containing one type of hydrogen gives only one monohalogen product.

Out of the options, neopentane has only one type of hydrogen.